Hesham El Faham

Université Catholique de Louvain

H-index: 33

Europe-Belgium

About Hesham El Faham

Hesham El Faham, With an exceptional h-index of 33 and a recent h-index of 33 (since 2020), a distinguished researcher at Université Catholique de Louvain, specializes in the field of Particle Physics.

His recent articles reflect a diverse array of research interests and contributions to the field:

Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at = 13 TeV

Extracting the speed of sound in the strongly interacting matter created in ultrarelativistic lead-lead collisions at the LHC

arXiv : Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at = 13 TeV

Search for Scalar Leptoquarks Produced via τ-Lepton–Quark Scattering in pp Collisions at s= 13 TeV

Search for long-lived particles decaying to final states with a pair of muons in proton-proton collisions at = 13.6 TeV

Measurement of the production cross section for a W boson in association with a charm quark in proton–proton collisions at [... formula...]

Measurement of energy correlators inside jets and determination of the strong coupling

Constraints on anomalous Higgs boson couplings from its production and decay using the WW channel in proton-proton collisions at = 13 TeV

Hesham El Faham Information

University	Université Catholique de Louvain
Position	Physics Doctoral Student
Citations(all)	3138
Citations(since 2020)	3135
Cited By	5
hIndex(all)	33
hIndex(since 2020)	33
i10Index(all)	74
i10Index(since 2020)	74
Email	Access Email
University Profile Page	Université Catholique de Louvain

Hesham El Faham Skills & Research Interests

Particle Physics

Top articles of Hesham El Faham

Measurement of multijet azimuthal correlations and determination of the strong coupling in proton-proton collisions at = 13 TeV

Authors

Aram Hayrapetyan,Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Konstantinos Damanakis,Marko Dragicevic,Priya Sajid Hussain,Manfred Jeitler,Natascha Krammer,Ang Li,Dietrich Liko,Ivan Mikulec,Jochen Schieck,Robert Schöfbeck,Dennis Schwarz,Mangesh Sonawane,Sebastian Templ,Wolfgang Waltenberger,Claudia-Elisabeth Wulz,Mohamed Rashad Darwish,Tahys Janssen,Pierre van Mechelen,Emil Sørensen Bols,Jorgen d'Hondt,Soumya Dansana,Alexandre de Moor,Martin Delcourt,Hesham El Faham,Steven Lowette,Inna Makarenko,Denise Müller,Abanti Ranadhir Sahasransu,Stefaan Tavernier,Michael Tytgat,Gerrit Patrick van Onsem,Senne van Putte,David Vannerom,Barbara Clerbaux,Aloke Kumar Das,Gilles de Lentdecker,Laurent Favart,Dmytro Hohov,Johny Jaramillo,Ali Khalilzadeh,Kyeongpil Lee,Mostafa Mahdavikhorrami,Andrea Malara,Santiago Paredes,Laurent Pétré,Nicolas Postiau,Laurent Thomas,Max Vanden Bemden,Pascal Vanlaer,Maarten de Coen,Didar Dobur,Yanwen Hong,Joscha Knolle,Luka Lambrecht,Gianny Mestdach,Kevin Mota Amarilo,César Rendón,Amrutha Samalan,Kirill Skovpen,Niels van den Bossche,Jan van der Linden,Liam Wezenbeek,Anna Benecke,Agni Bethani,Giacomo Bruno,Claudio Caputo,Christophe Delaere,Izzeddin Suat Donertas,Andrea Giammanco,Khawla Jaffel,Sandhya Jain,Vincent Lemaitre,Jindrich Lidrych,Paola Mastrapasqua,Kuntal Mondal,Tu Thong Tran,Sébastien Wertz,Gilvan Alves,Eduardo Coelho,Carsten Hensel,Thales Menezes de Oliveira,Arthur Moraes,Patricia Rebello Teles,Mariana Soeiro,Walter Luiz Aldá Júnior,Miguel Alves Gallo Pereira,Mapse Barroso Ferreira Filho,Helena Brandao Malbouisson,Wagner Carvalho,Jose Chinellato,Eliza Melo da Costa,Gustavo Gil da Silveira,Dilson de Jesus Damiao,Sandro Fonseca de Souza,Raphael Gomes de Souza,Jordan Martins,Clemencia Mora Herrera,Luiz Mundim,Helio Nogima,Alberto Santoro,Andre Sznajder,Mauricio Thiel,Antonio Vilela Pereira,Cesar Augusto Bernardes,Luigi Calligaris,Thiago Tomei,Eduardo de Moraes Gregores,Pedro G Mercadante,Sergio F Novaes,Breno Orzari,Sandra Padula,Aleksandar Aleksandrov,Georgy Antchev,Roumyana Hadjiiska,Plamen Iaydjiev,Milena Misheva,Mariana Shopova,Georgi Sultanov,Anton Dimitrov,Leander Litov,Borislav Pavlov,Peicho Petkov,Anton Petrov,Elton Shumka,Sumit Keshri,Shalini Thakur,Tongguang Cheng,Qianying Guo,Tahir Javaid,Li Yuan,Zhen Hu,Jinfeng Liu,Kai Yi,Guo-Ming Chen,He-Sheng Chen,Mingshui Chen,Fabio Iemmi,Chun-Hua Jiang,Anshul Kapoor,Hongbo Liao,Zhenan Liu,Ramkrishna Sharma,Jia-Ning Song,Junquan Tao

Journal

arXiv preprint arXiv:2404.16082

Published Date

2024/4/26

A measurement is presented of a ratio observable that provides a measure of the azimuthal correlations among jets with large transverse momentum . This observable is measured in multijet events over the range of = 360-3170 GeV based on data collected by the CMS experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 134 fb. The results are compared with predictions from Monte Carlo parton-shower event generator simulations, as well as with fixed-order perturbative quantum chromodynamics (pQCD) predictions at next-to-leading-order (NLO) accuracy obtained with different parton distribution functions (PDFs) and corrected for nonperturbative and electroweak effects. Data and theory agree within uncertainties. From the comparison of the measured observable with the pQCD prediction obtained with the NNPDF3.1 NLO PDFs, the strong coupling at the Z boson mass scale is = 0.1177 0.0013 (exp) (theo) = 0.1177, where the total uncertainty is dominated by the scale dependence of the fixed-order predictions. A test of the running of in the TeV region shows no deviation from the expected NLO pQCD behaviour.

Extracting the speed of sound in the strongly interacting matter created in ultrarelativistic lead-lead collisions at the LHC

Authors

Aram Hayrapetyan,Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Konstantinos Damanakis,Marko Dragicevic,Priya Sajid Hussain,Manfred Jeitler,Natascha Krammer,Ang Li,Dietrich Liko,Ivan Mikulec,Jochen Schieck,Robert Schöfbeck,Dennis Schwarz,Mangesh Sonawane,Sebastian Templ,Wolfgang Waltenberger,Claudia-Elisabeth Wulz,Mohamed Rashad Darwish,Tahys Janssen,Pierre van Mechelen,Emil Sørensen Bols,Jorgen d'Hondt,Soumya Dansana,Alexandre de Moor,Martin Delcourt,Hesham El Faham,Steven Lowette,Inna Makarenko,Denise Müller,Abanti Ranadhir Sahasransu,Stefaan Tavernier,Michael Tytgat,Gerrit Patrick van Onsem,Senne van Putte,David Vannerom,Barbara Clerbaux,Aloke Kumar Das,Gilles de Lentdecker,Laurent Favart,Paraskevas Gianneios,Dmytro Hohov,Johny Jaramillo,Ali Khalilzadeh,Kyeongpil Lee,Mostafa Mahdavikhorrami,Andrea Malara,Santiago Paredes,Nicolas Postiau,Laurent Thomas,Max Vanden Bemden,Pascal Vanlaer,Maarten de Coen,Didar Dobur,Yanwen Hong,Joscha Knolle,Luka Lambrecht,Gianny Mestdach,Kevin Mota Amarilo,César Rendón,Amrutha Samalan,Kirill Skovpen,Niels van den Bossche,Jan van der Linden,Liam Wezenbeek,Anna Benecke,Agni Bethani,Giacomo Bruno,Claudio Caputo,Christophe Delaere,Izzeddin Suat Donertas,Andrea Giammanco,Khawla Jaffel,Sandhya Jain,Vincent Lemaitre,Jindrich Lidrych,Paola Mastrapasqua,Kuntal Mondal,Tu Thong Tran,Sébastien Wertz,Gilvan Alves,Eduardo Coelho,Carsten Hensel,Thales Menezes de Oliveira,Arthur Moraes,Patricia Rebello Teles,Mariana Soeiro,Walter Luiz Aldá Júnior,Miguel Alves Gallo Pereira,Mapse Barroso Ferreira Filho,Helena Brandao Malbouisson,Wagner Carvalho,Jose Chinellato,Eliza Melo da Costa,Gustavo Gil da Silveira,Dilson de Jesus Damiao,Sandro Fonseca de Souza,Raphael Gomes de Souza,Jordan Martins,Clemencia Mora Herrera,Luiz Mundim,Helio Nogima,Joao Pedro Pinheiro,Alberto Santoro,Andre Sznajder,Mauricio Thiel,Antonio Vilela Pereira,Cesar Augusto Bernardes,Luigi Calligaris,Thiago Tomei,Eduardo de Moraes Gregores,Pedro G Mercadante,Sergio F Novaes,Breno Orzari,Sandra Padula,Aleksandar Aleksandrov,Georgy Antchev,Roumyana Hadjiiska,Plamen Iaydjiev,Milena Misheva,Mariana Shopova,Georgi Sultanov,Anton Dimitrov,Leander Litov,Borislav Pavlov,Peicho Petkov,Anton Petrov,Elton Shumka,Sumit Keshri,Shalini Thakur,Tongguang Cheng,Tahir Javaid,Li Yuan,Zhen Hu,Jinfeng Liu,Kai Yi,Guo-Ming Chen,He-Sheng Chen,Mingshui Chen,Fabio Iemmi,Chun-Hua Jiang,Anshul Kapoor,Hongbo Liao,Zhenan Liu,Ramkrishna Sharma,Jia-Ning Song,Junquan Tao

Published Date

2024/1/17

Ultrarelativistic nuclear collisions create a strongly interacting state of hot and dense quark-gluon matter that exhibits a remarkable collective flow behavior with minimal viscous dissipation. To gain deeper insights into its intrinsic nature and fundamental degrees of freedom, we extracted the speed of sound in this medium created using lead-lead (PbPb) collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 0.607 nb. The measurement is performed by studying the multiplicity dependence of the average transverse momentum of charged particles emitted in head-on PbPb collisions. Our findings reveal that the speed of sound in this matter is nearly half the speed of light, with a squared value of 0.241 0.002 (stat) 0.016 (syst) in natural units. The effective medium temperature, estimated using the mean transverse momentum, is 219 8 (syst) MeV. The measured squared speed of sound at this temperature aligns precisely with predictions from lattice quantum chromodynamic (QCD) calculations. This result provides a stringent constraint on the equation of state of the created medium and direct evidence for a deconfined QCD phase being attained in relativistic nuclear collisions.

arXiv : Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at = 13 TeV

Authors

Aram Hayrapetyan,Robin Erbacher,Camilo Andres Carrillo Montoya,Dave M Newbold,Wagner Carvalho,Nimmitha Karunarathna,Maciej Górski,Martin Janda,Manuel Sommerhalder,Cole Lindsey,Nukulsinh Parmar,Balazs Ujvari,Ayse Polatoz,Anna Tsatsos,Elton Shumka,Alfredo Gurrola,Anne-Marie Magnan,Roumyana Hadjiiska,Ian Laflotte,Ian Mcalister,Willard Johns,Ludivine Ceard,Pierre Van Hove,Mohammad Alhusseini,Alberto Orso Maria Iorio,Ulrich Heintz,Giuseppe Latino,Andrew Hart,Robin Hofsaess,Federico Vazzoler,Sinan Sagir,Changgi Huh,Georgios Tsipolitis,Joseph Lynn Dulemba,Sanghyun Ko,Dylan Apparu,Soureek Mitra,Hubert Niewiadomski,Sergei Slabospitskii,Shamik Ghosh,Martin Doubek,Michael Tytgat,Robert Schöfbeck,Julia Vazquez Escobar,Vladimir Samoylenko,James Hirschauer,Andreas Nürnberg,Ho Fung Tsoi,Reza Goldouzian,Victor Golovtcov,Ram Krishna Dewanjee,Chiara Rovelli,Eliza Melo Da Costa,Daniele Fasanella,Polina Simkina,Vipin Bhatnagar,Zhen Hu,Konstantin Sharko,Hans Reithler,Austin Baty,Soumya Mukherjee,Tomas Lindén,Jonathon Langford,Graham Wilson,William Tabb,Elena Popova,Furkan Dolek,Attilio Santocchia,Sergio Sánchez Navas,Manuel Calderon De La Barca Sanchez,Wolfram Dietrich Zeuner,Jiří Procházka,Hesham El Faham,Jithin Madhusudanan Sreekala,Raphael Granier de Cassagnac,Georgios Daskalakis,Kin Ho Lo,Axel Buchot Perraguin,Andrés Abreu,Ernesto Migliore,Alexander Zotz,Tilman Rohe,Paul Schütze,Ece Asilar,Edoardo Bossini,Grace Cummings,Yasser Assran,Florian Joel J Bury,Gurkan Karaman,Henri Petrow,Jonathan Guiang,Kai-Feng Chen,Matthew Nguyen,Liam Brennan,Irene Dutta,Giorgio Apollinari,Michael Oshiro,Damir Lelas,Gillian Kopp,Michel Della Negra,Amitabh Lath,Vladimir Eremin,Daria Selivanova,Klitos Savva,Alexander Pauls,Martijn Mulders,Fabrizio Palla,Nikolas Pervan,Lorenzo Uplegger,Marina Kolosova,Sunil Bansal,Roberval Walsh,Hugo Becerril Gonzalez,Vladimir Makarenko,Christopher Palmer,Kristan Allan Hahn,Tao Huang,Olmo Cerri,George Stephans,Siqi Yuan,Kimmo Tuomas Samuli Kallonen,Olena Karacheban,Alicia Calderon,Tyler Lam,Kevin Black,Thomas Kress,Georgia Karapostoli,Samuel Lascio,Fotios Ptochos,Berkan Kaynak,Wei Wei,Achille Petrilli,Diogo Bastos,Bhargav Madhusudan Joshi,Abhishikth Mallampalli,Chenfeng Lu,Maria Cepeda,Mauricio Thiel,Bingran Wang,J William Gary,Dylan Blend,Cécile Caillol,Yannik Rath,John Paul Chou,Nihar Ranjan Saha,Orgho Neogi,Mohammed Mahmoud,Peicho Petkov,John Rotter,Davide Piccolo

Published Date

2024/1/26

Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at = 13 TeV-Hayrapetyan, Aram et al-arXiv: 2401.14494 CMS-SMP-21-004TOTEM-2024-001CERN-EP-2023-279

Search for Scalar Leptoquarks Produced via τ-Lepton–Quark Scattering in pp Collisions at s= 13 TeV

Authors

A Hayrapetyan,A Tumasyan,W Adam,JW Andrejkovic,T Bergauer,S Chatterjee,K Damanakis,M Dragicevic,A Escalante Del Valle,PS Hussain,M Jeitler,N Krammer,D Liko,I Mikulec,J Schieck,R Schöfbeck,D Schwarz,M Sonawane,S Templ,W Waltenberger,CE Wulz,MR Darwish,T Janssen,P Van Mechelen,ES Bols,J D’Hondt,S Dansana,A De Moor,M Delcourt,H El Faham,S Lowette,I Makarenko,D Müller,AR Sahasransu,S Tavernier,M Tytgat,S Van Putte,D Vannerom,B Clerbaux,G De Lentdecker,L Favart,D Hohov,J Jaramillo,A Khalilzadeh,K Lee,M Mahdavikhorrami,A Malara,S Paredes,L Pétré,N Postiau,L Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,M De Coen,D Dobur,Y Hong,J Knolle,L Lambrecht,G Mestdach,C Rendón,A Samalan,K Skovpen,N Van Den Bossche,L Wezenbeek,A Benecke,G Bruno,C Caputo,C Delaere,IS Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,J Lidrych,P Mastrapasqua,K Mondal,TT Tran,S Wertz,GA Alves,E Coelho,C Hensel,T Menezes De Oliveira,A Moraes,P Rebello Teles,M Soeiro,WL Aldá Júnior,M Alves Gallo Pereira,Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,EM Da Costa,GG Da Silveira,D De Jesus Damiao,S Fonseca De Souza,J Martins,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,A Santoro,SM Silva Do Amaral,A Sznajder,M Thiel,A Vilela Pereira,CA Bernardes,L Calligaris,TR Tomei,EM Gregores,PG Mercadante,SF Novaes,B Orzari,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Shopova,G Sultanov,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,E Shumka,S Keshri,S Thakur,T Cheng,Q Guo,T Javaid,M Mittal,L Yuan,G Bauer,Z Hu,J Liu,K Yi,GM Chen,HS Chen,M Chen,F Iemmi,CH Jiang,A Kapoor,H Liao,ZA Liu,F Monti,MA Shahzad,R Sharma

Journal

Physical Review Letters

Published Date

2024/2/8

The first search for scalar leptoquarks produced in τ-lepton–quark collisions is presented. It is based on a set of proton-proton collision data recorded with the CMS detector at the LHC at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 138 fb− 1. The reconstructed final state consists of a jet, significant missing transverse momentum, and a τ lepton reconstructed through its hadronic or leptonic decays. Limits are set on the product of the leptoquark production cross section and branching fraction and interpreted as exclusions in the plane of the leptoquark mass and the leptoquark-τ-quark coupling strength.

Search for long-lived particles decaying to final states with a pair of muons in proton-proton collisions at = 13.6 TeV

Authors

Aram Hayrapetyan

Published Date

2024/2/22

An inclusive search for long-lived exotic particles (LLPs) decaying to final states with a pair of muons is presented. The search uses data corresponding to an integrated luminosity of 36.6 fb collected by the CMS experiment from the proton-proton collisions at = 13.6 TeV in 2022, the first year of Run 3 of the CERN LHC. The experimental signature is a pair of oppositely charged muons originating from a common vertex spatially separated from the proton-proton interaction point by distances ranging from several hundred m to several meters. The sensitivity of the search benefits from new triggers for displaced dimuons developed for Run 3. The results are interpreted in the framework of the hidden Abelian Higgs model, in which the Higgs boson decays to a pair of long-lived dark photons, and of an -parity violating supersymmetry model, in which long-lived neutralinos decay to a pair of muons and a neutrino. The limits set on these models are the most stringent to date in wide regions of lifetimes for LLPs with masses larger than 10 GeV.

Measurement of the production cross section for a W boson in association with a charm quark in proton–proton collisions at [... formula...]

Authors

CMS collaboration

Journal

The European physical journal. C, Particles and fields

Published Date

2024

The strange quark content of the proton is probed through the measurement of the production cross section for a W boson and a charm (c) quark in proton–proton collisions at a center-of-mass energy of 13 Te V. The analysis uses a data sample corresponding to a total integrated luminosity of 138 fb-1 collected with the CMS detector at the LHC. The W bosons are identified through their leptonic decays to an electron or a muon, and a neutrino. Charm jets are tagged using the presence of a muon or a secondary vertex inside the jet. The W+ c production cross section and the cross section ratio R c±= σ (W++ c)/σ (W-+ c) are measured inclusively and differentially as functions of the transverse momentum and the pseudorapidity of the lepton originating from the W boson decay. The precision of the measurements is improved with respect to previous studies, reaching 1% in R c±= 0.950±0.005 (stat)±0.010 (syst). The …

Measurement of energy correlators inside jets and determination of the strong coupling

Authors

Aram Hayrapetyan,Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Konstantinos Damanakis,Marko Dragicevic,Priya Sajid Hussain,Manfred Jeitler,Natascha Krammer,Ang Li,Dietrich Liko,Ivan Mikulec,Jochen Schieck,Robert Schöfbeck,Dennis Schwarz,Mangesh Sonawane,Sebastian Templ,Wolfgang Waltenberger,Claudia-Elisabeth Wulz,Mohamed Rashad Darwish,Tahys Janssen,Pierre van Mechelen,Emil Sørensen Bols,Jorgen d'Hondt,Soumya Dansana,Alexandre de Moor,Martin Delcourt,Hesham El Faham,Steven Lowette,Inna Makarenko,Denise Müller,Abanti Ranadhir Sahasransu,Stefaan Tavernier,Michael Tytgat,Gerrit Patrick van Onsem,Senne van Putte,David Vannerom,Barbara Clerbaux,Aloke Kumar Das,Gilles de Lentdecker,Laurent Favart,Paraskevas Gianneios,Dmytro Hohov,Johny Jaramillo,Ali Khalilzadeh,Fakhri Alam Khan,Kyeongpil Lee,Mostafa Mahdavikhorrami,Andrea Malara,Santiago Paredes,Laurent Thomas,Max Vanden Bemden,Pascal Vanlaer,Maarten de Coen,Didar Dobur,Yanwen Hong,Joscha Knolle,Luka Lambrecht,Gianny Mestdach,Kevin Mota Amarilo,César Rendón,Amrutha Samalan,Kirill Skovpen,Niels van den Bossche,Jan van der Linden,Liam Wezenbeek,Anna Benecke,Agni Bethani,Giacomo Bruno,Claudio Caputo,Christophe Delaere,Izzeddin Suat Donertas,Andrea Giammanco,Khawla Jaffel,Sandhya Jain,Vincent Lemaitre,Jindrich Lidrych,Paola Mastrapasqua,Kuntal Mondal,Tu Thong Tran,Sébastien Wertz,Gilvan Alves,Eduardo Coelho,Carsten Hensel,Thales Menezes de Oliveira,Arthur Moraes,Patricia Rebello Teles,Mariana Soeiro,Walter Luiz Aldá Júnior,Miguel Alves Gallo Pereira,Mapse Barroso Ferreira Filho,Helena Brandao Malbouisson,Wagner Carvalho,Jose Chinellato,Eliza Melo da Costa,Gustavo Gil da Silveira,Dilson de Jesus Damiao,Sandro Fonseca de Souza,Raphael Gomes de Souza,Jordan Martins,Clemencia Mora Herrera,Luiz Mundim,Helio Nogima,Joao Pedro Pinheiro,Alberto Santoro,Andre Sznajder,Mauricio Thiel,Antonio Vilela Pereira,Cesar Augusto Bernardes,Luigi Calligaris,Thiago Tomei,Eduardo de Moraes Gregores,Pedro G Mercadante,Sergio F Novaes,Breno Orzari,Sandra Padula,Aleksandar Aleksandrov,Georgy Antchev,Roumyana Hadjiiska,Plamen Iaydjiev,Milena Misheva,Mariana Shopova,Georgi Sultanov,Anton Dimitrov,Leander Litov,Borislav Pavlov,Peicho Petkov,Anton Petrov,Elton Shumka,Sumit Keshri,Shalini Thakur,Tongguang Cheng,Tahir Javaid,Li Yuan,Zhen Hu,Jinfeng Liu,Kai Yi,Guo-Ming Chen,He-Sheng Chen,Mingshui Chen,Fabio Iemmi,Chun-Hua Jiang,Anshul Kapoor,Hongbo Liao,Zhenan Liu,Ramkrishna Sharma,Jia-Ning Song,Junquan Tao

Published Date

2024/2/27

Energy correlators that describe energy-weighted distances between two or three particles in a jet are measured using an event sample of = 13 TeV proton-proton collisions collected by the CMS experiment and corresponding to an integrated luminosity of 36.3 fb. The measured distributions reveal two key features of the strong interaction: confinement and asymptotic freedom. By comparing the ratio of the two measured distributions with theoretical calculations that resum collinear emissions at approximate next-to-next-to-leading logarithmic accuracy matched to a next-to-leading order calculation, the strong coupling is determined at the Z boson mass: = 0.1229, the most precise value obtained using jet substructure observables.

Constraints on anomalous Higgs boson couplings from its production and decay using the WW channel in proton-proton collisions at = 13 TeV

Authors

Aram Hayrapetyan,Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Konstantinos Damanakis,Marko Dragicevic,Priya Sajid Hussain,Manfred Jeitler,Natascha Krammer,Ang Li,Dietrich Liko,Ivan Mikulec,Jochen Schieck,Robert Schöfbeck,Dennis Schwarz,Mangesh Sonawane,Sebastian Templ,Wolfgang Waltenberger,Claudia-Elisabeth Wulz,Mohamed Rashad Darwish,Tahys Janssen,Pierre van Mechelen,Emil Sørensen Bols,Jorgen d'Hondt,Soumya Dansana,Alexandre de Moor,Martin Delcourt,Hesham El Faham,Steven Lowette,Inna Makarenko,Denise Müller,Abanti Ranadhir Sahasransu,Stefaan Tavernier,Michael Tytgat,Gerrit Patrick van Onsem,Senne van Putte,David Vannerom,Barbara Clerbaux,Aloke Kumar Das,Gilles de Lentdecker,Laurent Favart,Paraskevas Gianneios,Dmytro Hohov,Johny Jaramillo,Ali Khalilzadeh,Kyeongpil Lee,Mostafa Mahdavikhorrami,Andrea Malara,Santiago Paredes,Laurent Pétré,Nicolas Postiau,Laurent Thomas,Max Vanden Bemden,Pascal Vanlaer,Maarten de Coen,Didar Dobur,Yanwen Hong,Joscha Knolle,Luka Lambrecht,Gianny Mestdach,Kevin Mota Amarilo,César Rendón,Amrutha Samalan,Kirill Skovpen,Niels van den Bossche,Jan van der Linden,Liam Wezenbeek,Anna Benecke,Agni Bethani,Giacomo Bruno,Claudio Caputo,Christophe Delaere,Izzeddin Suat Donertas,Andrea Giammanco,Khawla Jaffel,Sandhya Jain,Vincent Lemaitre,Jindrich Lidrych,Paola Mastrapasqua,Kuntal Mondal,Tu Thong Tran,Sébastien Wertz,Gilvan Alves,Eduardo Coelho,Carsten Hensel,Thales Menezes de Oliveira,Arthur Moraes,Patricia Rebello Teles,Mariana Soeiro,Walter Luiz Aldá Júnior,Miguel Alves Gallo Pereira,Mapse Barroso Ferreira Filho,Helena Brandao Malbouisson,Wagner Carvalho,Jose Chinellato,Eliza Melo da Costa,Gustavo Gil da Silveira,Dilson de Jesus Damiao,Sandro Fonseca de Souza,Raphael Gomes de Souza,Jordan Martins,Clemencia Mora Herrera,Luiz Mundim,Helio Nogima,Joao Pedro Pinheiro,Alberto Santoro,Andre Sznajder,Mauricio Thiel,Antonio Vilela Pereira,Cesar Augusto Bernardes,Luigi Calligaris,Thiago Tomei,Eduardo de Moraes Gregores,Pedro G Mercadante,Sergio F Novaes,Breno Orzari,Sandra Padula,Aleksandar Aleksandrov,Georgy Antchev,Roumyana Hadjiiska,Plamen Iaydjiev,Milena Misheva,Mariana Shopova,Georgi Sultanov,Anton Dimitrov,Leander Litov,Borislav Pavlov,Peicho Petkov,Anton Petrov,Elton Shumka,Sumit Keshri,Shalini Thakur,Tongguang Cheng,Tahir Javaid,Li Yuan,Zhen Hu,Jinfeng Liu,Kai Yi,Guo-Ming Chen,He-Sheng Chen,Mingshui Chen,Fabio Iemmi,Chun-Hua Jiang,Anshul Kapoor,Hongbo Liao,Zhenan Liu,Ramkrishna Sharma,Jia-Ning Song

Journal

arXiv preprint arXiv:2403.00657

Published Date

2024/3/19

A study of the anomalous couplings of the Higgs boson to vector bosons, including -violation effects, has been conducted using its production and decay in the WW channel. This analysis is performed on proton-proton collision data collected with the CMS detector at the CERN LHC during 2016-2018 at a center-of-mass energy of 13 TeV, and corresponds to an integrated luminosity of 138 fb. The different-flavor dilepton (e) final state is analyzed, with dedicated categories targeting gluon fusion, electroweak vector boson fusion, and associated production with a W or Z boson. Kinematic information from associated jets is combined using matrix element techniques to increase the sensitivity to anomalous effects at the production vertex. A simultaneous measurement of four Higgs boson couplings to electroweak vector bosons is performed in the framework of a standard model effective field theory. All measurements are consistent with the expectations for the standard model Higgs boson and constraints are set on the fractional contribution of the anomalous couplings to the Higgs boson production cross section.

New Structures in the Formula Presented Mass Spectrum in Proton-Proton Collisions at Formula Presented

Authors

A Hayrapetyan,A Tumasyan,W Adam,J Andrejkovic,T Bergauer,S Chatterjee,K Damanakis,M Dragicevic,A Escalante Del Valle,P Hussain,M Jeitler,N Krammer,D Liko,I Mikulec,J Schieck,R Schofbeck,D Schwarz,M Sonawane,S Templ,W Waltenberger,C Wulz,M Darwish,T Janssen,P Van Mechelen,E Bols,J D'Hondt,S Dansana,A De Moor,M Delcourt,H El Faham,S Lowette,I Makarenko,D Muller,A Sahasransu,S Tavernier,M Tytgat,S Van Putte,D Vannerom,B Clerbaux,G De Lentdecker,L Favart,D Hohov,J Jaramillo,A Khalilzadeh,K Lee,M Mahdavikhorrami,A Malara,S Paredes,L Pétré,N Postiau,L Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,M De Coen,D Dobur,Y Hong,J Knolle,L Lambrecht,G Mestdach,C Rendón,A Samalan,K Skovpen,N Van Den Bossche,L Wezenbeek,A Benecke,G Bruno,C Caputo,C Delaere,I Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,J Lidrych,P Mastrapasqua,K Mondal,T Tran,S Wertz,G Alves,E Coelho,C Hensel,T Menezes De Oliveira,A Moraes,P Rebello Teles,M Soeiro,W Alda Junior,M Alves Gallo Pereira,Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,E Da Costa,G Da Silveira,D De Jesus Damiao,S Fonseca De Souza,J Martins,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,A Santoro,S Silva Do Amaral,A Sznajder,M Thiel,A Vilela Pereira,C Bernardes,L Calligaris,T Tomei,E Gregores,P Mercadante,S Novaes,B Orzari,Sandra Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Shopova,G Sultanov,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,E Shumka,S Keshri,S Thakur,T Cheng,Q Guo,T Javaid,M Mittal,L Yuan,G Bauer,J Chen,J Gu,Z Hu,J Liu,X Wang,H Wen,K Yi,J Zhang,G Chen,H Chen,M Chen,F Iemmi,C Jiang,A Kapoor

Journal

Physical Review Letters

Published Date

2024

A search is reported for near-threshold structures in the Formula Presented invariant mass spectrum produced in proton-proton collisions at Formula Presented from data collected by the CMS experiment, corresponding to an integrated luminosity of Formula Presented. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of Formula Presented. Another structure with even higher significance is found at a mass of Formula Presented, which is consistent with the Formula Presented resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of Formula Presented. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference.

Search for the lepton flavor violating τ→ 3μ decay in proton-proton collisions at

Authors

A Hayrapetyan,A Tumasyan,W Adam,JW Andrejkovic,T Bergauer,S Chatterjee,K Damanakis,M Dragicevic,PS Hussain,M Jeitler,N Krammer,A Li,D Liko,I Mikulec,J Schieck,R Schöfbeck,D Schwarz,M Sonawane,S Templ,W Waltenberger,CE Wulz,MR Darwish,T Janssen,P Van Mechelen,ES Bols,J D'Hondt,S Dansana,A De Moor,M Delcourt,H El Faham,S Lowette,I Makarenko,D Müller,AR Sahasransu,S Tavernier,M Tytgat,S Van Putte,D Vannerom,B Clerbaux,G De Lentdecker,L Favart,D Hohov,J Jaramillo,A Khalilzadeh,K Lee,M Mahdavikhorrami,A Malara,S Paredes,L Pétré,N Postiau,L Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,M De Coen,D Dobur,Y Hong,J Knolle,L Lambrecht,G Mestdach,C Rendón,A Samalan,K Skovpen,N Van Den Bossche,L Wezenbeek,A Benecke,G Bruno,C Caputo,C Delaere,IS Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,J Lidrych,P Mastrapasqua,K Mondal,TT Tran,S Wertz,GA Alves,E Coelho,C Hensel,T Menezes De Oliveira,A Moraes,P Rebello Teles,M Soeiro,WL Aldá Júnior,M Alves Gallo Pereira,Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,EM Da Costa,GG Da Silveira,D De Jesus Damiao,S Fonseca De Souza,J Martins,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,A Santoro,A Sznajder,M Thiel,A Vilela Pereira,CA Bernardes,L Calligaris,TR Fernandez Perez Tomei,EM Gregores,PG Mercadante,SF Novaes,B Orzari,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Shopova,G Sultanov,A Dimitrov,L Litov,B Pavlov,P Petkov,A Petrov,E Shumka,S Keshri,S Thakur,T Cheng,Q Guo,T Javaid,L Yuan,Z Hu,J Liu,K Yi,GM Chen,HS Chen,M Chen,F Iemmi,CH Jiang,A Kapoor,H Liao,ZA Liu,R Sharma,JN Song,J Tao,C Wang,J Wang,Z Wang,H Zhang

Journal

Physics Letters B

Published Date

2024/4/10

A search for the lepton flavor violating τ→ 3μ decay is performed using proton-proton collision events at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2017–2018, corresponding to an integrated luminosity of 97.7 fb− 1. Tau leptons produced in both heavy-flavor hadron and W boson decays are exploited in the analysis. No evidence for the decay is observed. The results of this search are combined with an earlier null result based on data collected in 2016 to obtain a total integrated luminosity of 131 fb− 1. The observed (expected) upper limits on the branching fraction(τ→ 3μ) at confidence levels of 90 and 95% are 2. 9× 10− 8 (2. 4× 10− 8) and 3. 6× 10− 8 (3. 0× 10− 8), respectively.

Test of lepton flavor universality in B K and B Kee decays in proton-proton collisions at = 13 TeV

Authors

Aram Hayrapetyan

Published Date

2024/1/13

A test of lepton flavor universality in B K and B Kee decays, as well as a measurement of differential and integrated branching fractions of a nonresonant B K decay are presented. The analysis is made possible by a dedicated data set of proton-proton collisions at = 13 TeV recorded in 2018, by the CMS experiment at the LHC, using a special high-rate data stream designed for collecting about 10 billion unbiased b hadron decays. The ratio of the branching fractions (B K) to (B Kee) is determined from the measured double ratio (K) of these decays to the respective branching fractions of the B J/K with J/ and ee decays, which allow for significant cancellation of systematic uncertainties. The ratio (K) is measured in the range 1.1 6.0 GeV, where is the invariant mass of the lepton pair, and is found to be (K) = 0.78, in agreement with the standard model expectation (K) 1. This measurement is limited by the statistical precision of the electron channel. The integrated branching fraction in the same range, (B K) = (12.42 0.68) 10, is consistent with the present world-average value and has a comparable precision.

Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at = 13 TeV

Authors

Aram Hayrapetyan

Published Date

2024/1/25

The central exclusive production of charged-hadron pairs in pp collisions at a centre-of-mass energy of 13\TeV is examined, based on data collected in a special high- run of the LHC. The nonresonant continuum processes are studied with the invariant mass of the centrally produced two-pion system in the resonance-free region, 0.7 GeV or 1.8 GeV. Differential cross sections as functions of the azimuthal angle between the surviving protons, squared exchanged four-momenta, and are measured in a wide region of scattered proton transverse momenta, between 0.2 and 0.8 GeV, and for pion rapidities $\lvert y\rvert$ 2. A rich structure of interactions related to double-pomeron exchange is observed. A parabolic minimum in the distribution of the two-proton azimuthal angle is observed for the first time. It can be interpreted as an effect of additional pomeron exchanges between the protons from the interference between the bare and the rescattered amplitudes. After model tuning, various physical quantities are determined that are related to the pomeron cross section, proton-pomeron and meson-pomeron form factors, pomeron trajectory and intercept, and coefficients of diffractive eigenstates of the proton.

Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at = 13 TeV

Authors

Aram Hayrapetyan

Published Date

2024/2/2

A combination of the results of several searches for the electroweak production of the supersymmetric partners of standard model bosons, and of charged leptons, is presented. All searches use proton-proton collision data at = 13 TeV recorded with the CMS detector at the LHC in 2016-2018. The analyzed data correspond to an integrated luminosity of up to 137 fb. The results are interpreted in terms of simplified models of supersymmetry. Two new interpretations are added with this combination: a model spectrum with the bino as the lightest supersymmetric particle together with mass-degenerate higgsinos decaying to the bino and a standard model boson, and the compressed-spectrum region of a previously studied model of slepton pair production. Improved analysis techniques are employed to optimize sensitivity for the compressed spectra in the wino and slepton pair production models. The results are consistent with expectations from the standard model. The combination provides a more comprehensive coverage of the model parameter space than the individual searches, extending the exclusion by up to 125 GeV, and also targets some of the intermediate gaps in the mass coverage.

Search for a scalar or pseudoscalar dilepton resonance produced in association with a massive vector boson or top quark-antiquark pair in multilepton events at $\sqrt {s} $= 13 TeV

Authors

Armen Tumasyan

Published Date

2024/2/16

A search for beyond the standard model spin-0 bosons, , that decay into pairs of electrons, muons, or tau leptons is presented. The search targets the associated production of such bosons with a W or Z gauge boson, or a top quark-antiquark pair, and uses events with three or four charged leptons, including hadronically decaying tau leptons. The proton-proton collision data set used in the analysis was collected at the LHC from 2016 to 2018 at a center-of-mass energy of 13 TeV, and corresponds to an integrated luminosity of 138 fb. The observations are consistent with the predictions from standard model processes. Upper limits are placed on the product of cross sections and branching fractions of such new particles over the mass range of 15 to 350 GeV with scalar, pseudoscalar, or Higgs-boson-like couplings, as well as on the product of coupling parameters and branching fractions. Several model-dependent exclusion limits are also presented. For a Higgs-boson-like model, limits are set on the mixing angle of the Higgs boson with the boson. For the associated production of a boson with a top quark-antiquark pair, limits are set on the coupling to top quarks. Finally, limits are set for the first time on a fermiophilic dilaton-like model with scalar couplings and a fermiophilic axion-like model with pseudoscalar couplings.

A search for bottom-type vector-like quark pair production in dileptonic and fully hadronic final states in proton-proton collisions at = 13 TeV

Authors

Published Date

2024/2/27

A search is described for the production of a pair of bottom-type vector-like quarks (B VLQs) with mass greater than 1000 GeV. Each B VLQ decays into a b quark and a Higgs boson, a b quark and a Z boson, or a t quark and a W boson. This analysis considers both fully hadronic final states and those containing a charged lepton pair from a Z boson decay. The products of the H bb boson decay and of the hadronic Z or W boson decays can be resolved as two distinct jets or merged into a single jet, so the final states are classified by the number of reconstructed jets. The analysis uses data corresponding to an integrated luminosity of 138 fb collected in proton-proton collisions at = 13 TeV with the CMS detector at the LHC from 2016 to 2018. No excess over the expected background is observed. Lower limits are set on the B VLQ mass at 95% confidence level. These depend on the B VLQ branching fractions and are 1570 and 1540 GeV for 100% B bH and 100% B bZ, respectively. In most cases, the mass limits obtained exceed previous limits by at least 100 GeV.

New Structures in the J/ψJ/ψ Mass Spectrum in Proton-Proton Collisions at s= 13 TeV

Authors

A Hayrapetyan,A Tumasyan,W Adam,JW Andrejkovic,T Bergauer,S Chatterjee,K Damanakis,M Dragicevic,A Escalante Del Valle,PS Hussain,M Jeitler,N Krammer,D Liko,I Mikulec,J Schieck,R Schöfbeck,D Schwarz,M Sonawane,S Templ,W Waltenberger,CE Wulz,MR Darwish,T Janssen,P Van Mechelen,ES Bols,J D’Hondt,S Dansana,A De Moor,M Delcourt,H El Faham,S Lowette,I Makarenko,D Müller,AR Sahasransu,S Tavernier,M Tytgat,S Van Putte,D Vannerom,B Clerbaux,G De Lentdecker,L Favart,D Hohov,J Jaramillo,A Khalilzadeh,K Lee,M Mahdavikhorrami,A Malara,S Paredes,L Pétré,N Postiau,L Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,M De Coen,D Dobur,Y Hong,J Knolle,L Lambrecht,G Mestdach,C Rendón,A Samalan,K Skovpen,N Van Den Bossche,L Wezenbeek,A Benecke,G Bruno,C Caputo,C Delaere,IS Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,J Lidrych,P Mastrapasqua,K Mondal,TT Tran,S Wertz,GA Alves,E Coelho,C Hensel,T Menezes De Oliveira,A Moraes,P Rebello Teles,M Soeiro,WL Aldá Júnior,M Alves Gallo Pereira,Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,EM Da Costa,GG Da Silveira,D De Jesus Damiao,S Fonseca De Souza,J Martins,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,A Santoro,SM Silva Do Amaral,A Sznajder,M Thiel,A Vilela Pereira,CA Bernardes,L Calligaris,TR Tomei,EM Gregores,PG Mercadante,SF Novaes,B Orzari,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Shopova,G Sultanov,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,E Shumka,S Keshri,S Thakur,T Cheng,Q Guo,T Javaid,M Mittal,L Yuan,G Bauer,J Chen,J Gu,Z Hu,J Liu,X Wang,H Wen,K Yi,J Zhang,GM Chen,HS Chen,M Chen,F Iemmi,CH Jiang,A Kapoor

Journal

Physical Review Letters

Published Date

2024/3/15

A search is reported for near-threshold structures in the J/ψ J/ψ invariant mass spectrum produced in proton-proton collisions at s= 13 TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135 fb− 1. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638− 38+ 43 (stat)− 31+ 16 (syst) MeV. Another structure with even higher significance is found at a mass of 6847− 28+ 44 (stat)− 20+ 48 (syst) MeV, which is consistent with the X (6900) resonance reported by the LHCb experiment and confirmed by the ATLAS experiment. Evidence for another new structure, with a local significance of 4.7 standard deviations, is found at a mass of 7134− 25+ 48 (stat)− 15+ 41 (syst) MeV. Results are also reported for a model without interference, which does not fit the data as well and shows mass shifts up to 150 MeV relative to the model with interference.

Muon identification using multivariate techniques in the CMS experiment in proton-proton collisions at√ S= 13 TeV

Authors

CMS Collaboration

Journal

arXiv preprint arXiv:2310.03844

Published Date

2023/10/5

The identification of prompt and isolated muons, as well as muons from heavy-flavour hadron decays, is an important task. We developed two multivariate techniques to provide highly efficient identification for muons with transverse momentum greater than 10\GeV. One provides a continuous variable as an alternative to a cut-based identification selection and offers a better discrimination power against misidentified muons. The other one selects prompt and isolated muons by using isolation requirements to reduce the contamination from nonprompt muons arising in heavy-flavour hadron decays. Both algorithms are developed using 59.7 fb of proton-proton collisions data at a centre-of-mass energy of = 13 TeV collected in 2018 with the CMS experiment at the CERN LHC.

Measurement of Differential ZZ+Jets Production Cross Sections in pp Collisions at = 13 TeV

Authors

Aram Hayrapetyan

Published Date

2024/4/3

Diboson production in association with jets is studied in the fully leptonic final states, pp (Z)(Z/)+jets 22+jets, ( = e or ) in proton-proton collisions at a center-of-mass energy of 13 TeV. The data sample corresponds to an integrated luminosity of 138 fb collected with the CMS detector at the LHC. Differential distributions and normalized differential cross sections are measured as a function of jet multiplicity, transverse momentum , pseudorapidity , invariant mass and of the highest- and second-highest- jets, and as a function of invariant mass of the four-lepton system for events with various jet multiplicities. These differential cross sections are compared with theoretical predictions that mostly agree with the experimental data. However, in a few regions we observe discrepancies between the predicted and measured values. Further improvement of the predictions is required to describe the ZZ+jets production in the whole phase space.

Test of lepton flavor universality in and decays in proton-proton collisions at 13 TeV

Authors

Aram Hayrapetyan,Robin Erbacher,Camilo Andres Carrillo Montoya,Dave M Newbold,Wagner Carvalho,Nimmitha Karunarathna,Maciej Górski,Manuel Sommerhalder,Cole Lindsey,Nukulsinh Parmar,Balazs Ujvari,Ayse Polatoz,Anna Tsatsos,Elton Shumka,Alfredo Gurrola,Anne-Marie Magnan,Roumyana Hadjiiska,Ian Laflotte,Ian Mcalister,Willard Johns,Ludivine Ceard,Pierre Van Hove,Mohammad Alhusseini,Alberto Orso Maria Iorio,Ulrich Heintz,Giuseppe Latino,Andrew Hart,Robin Hofsaess,Federico Vazzoler,Sinan Sagir,Changgi Huh,Georgios Tsipolitis,Joseph Lynn Dulemba,Sanghyun Ko,Dylan Apparu,Soureek Mitra,Sergei Slabospitskii,Shamik Ghosh,Michael Tytgat,Robert Schöfbeck,Julia Vazquez Escobar,James Hirschauer,Andreas Nürnberg,Ho Fung Tsoi,Reza Goldouzian,Victor Golovtcov,Ram Krishna Dewanjee,Chiara Rovelli,Eliza Melo Da Costa,Daniele Fasanella,Polina Simkina,Vipin Bhatnagar,Zhen Hu,Konstantin Sharko,Hans Reithler,Austin Baty,Soumya Mukherjee,Tomas Lindén,Jonathon Langford,Graham Wilson,Younghoon Lee,William Tabb,Elena Popova,Furkan Dolek,Attilio Santocchia,Sergio Sánchez Navas,Manuel Calderon De La Barca Sanchez,Wolfram Dietrich Zeuner,Hesham El Faham,Jithin Madhusudanan Sreekala,Raphael Granier de Cassagnac,Georgios Daskalakis,Kin Ho Lo,Axel Buchot Perraguin,Andrés Abreu,Ernesto Migliore,Alexander Zotz,Tilman Rohe,Paul Schütze,Ece Asilar,Salvatore Nuzzo,Grace Cummings,Florian Joel J Bury,Gurkan Karaman,Henri Petrow,Jonathan Guiang,Kai-Feng Chen,Matthew Nguyen,Liam Brennan,Irene Dutta,Giorgio Apollinari,Michael Oshiro,Damir Lelas,Gillian Kopp,Michel Della Negra,Amitabh Lath,Daria Selivanova,Klitos Savva,Alexander Pauls,Martijn Mulders,Fabrizio Palla,Nikolas Pervan,Lorenzo Uplegger,Marina Kolosova,Sunil Bansal,Roberval Walsh,Hugo Becerril Gonzalez,Vladimir Makarenko,Christopher Palmer,Kristan Allan Hahn,Tao Huang,Olmo Cerri,George Stephans,Siqi Yuan,Kimmo Tuomas Samuli Kallonen,Olena Karacheban,Alicia Calderon,Tyler Lam,Kevin Black,Thomas Kress,Georgia Karapostoli,Samuel Lascio,Fotios Ptochos,Berkan Kaynak,Wei Wei,Achille Petrilli,Diogo Bastos,Bhargav Madhusudan Joshi,Abhishikth Mallampalli,Chenfeng Lu,Maria Cepeda,Mauricio Thiel,Bingran Wang,J William Gary,Dylan Blend,Cécile Caillol,Yannik Rath,Krisztina Márton,Nihar Ranjan Saha,Orgho Neogi,Mohammed Mahmoud,Peicho Petkov,John Rotter,Davide Piccolo,Florian Rehm,Pawel de Barbaro,Vaia Papadimitriou,Robert White,Nural Akchurin,Patrice Verdier

Published Date

2024/1/12

A test of lepton flavor universality in and decays, as well as a measurement of differential and integrated branching fractions of a nonresonant decay are presented. The analysis is made possible by a dedicated data set of proton-proton collisions at 13 TeV recorded in 2018, by the CMS experiment at the LHC, using a special high-rate data stream designed for collecting about 10 billion unbiased b hadron decays. The ratio of the branching fractions to is determined from the measured double ratio of these decays to the respective branching fractions of the with and decays, which allow for significant cancellation of systematic uncertainties. The ratio is measured in the range 1.16.0 GeV , where is the invariant mass of the lepton pair, and is found to be 0.78, in agreement with the standard model expectation 1. This measurement is limited by the statistical precision of the electron channel. The integrated branching fraction in the same range, (12.420.68) 10, is consistent with the present world-average value and has a comparable precision.

Search for Inelastic Dark Matter in Events with Two Displaced Muons and Missing Transverse Momentum in Proton-Proton Collisions at s= 13 TeV

Authors

Aram Hayrapetyan,Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Konstantinos Damanakis,Marko Dragicevic,Alberto Escalante Del Valle,Priya Sajid Hussain,Manfred Jeitler,Natascha Krammer,Dietrich Liko,Ivan Mikulec,Jochen Schieck,Robert Schöfbeck,Dennis Schwarz,Mangesh Sonawane,Sebastian Templ,Wolfgang Waltenberger,Claudia-Elisabeth Wulz,Mohamed Rashad Darwish,Tahys Janssen,Pierre Van Mechelen,Emil Sørensen Bols,Jorgen D’Hondt,Soumya Dansana,Alexandre De Moor,Martin Delcourt,Hesham El Faham,Steven Lowette,Inna Makarenko,Alexander Morton,Denise Müller,Abanti Ranadhir Sahasransu,Stefaan Tavernier,Michael Tytgat,Senne Van Putte,David Vannerom,Barbara Clerbaux,Gilles De Lentdecker,Laurent Favart,Dmytro Hohov,Johny Jaramillo,Ali Khalilzadeh,Kyeongpil Lee,Mostafa Mahdavikhorrami,Andrea Malara,Santiago Paredes,Laurent Pétré,Nicolas Postiau,Laurent Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,M De Coen,D Dobur,J Knolle,L Lambrecht,G Mestdach,C Rendón,A Samalan,K Skovpen,N Van Den Bossche,L Wezenbeek,A Benecke,G Bruno,C Caputo,C Delaere,IS Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,J Lidrych,P Mastrapasqua,K Mondal,TT Tran,S Wertz,GA Alves,E Coelho,C Hensel,T Menezes De Oliveira,A Moraes,P Rebello Teles,M Soeiro,WL Aldá Júnior,M Alves Gallo Pereira,Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,EM Da Costa,GG Da Silveira,D De Jesus Damiao,S Fonseca De Souza,J Martins,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,A Santoro,SM Silva Do Amaral,A Sznajder,M Thiel,A Vilela Pereira,CA Bernardes,L Calligaris,TR Tomei,EM Gregores,PG Mercadante,SF Novaes,B Orzari,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Shopova,G Sultanov,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,E Shumka,S Keshri,S Thakur,T Cheng,Q Guo,T Javaid,M Mittal,L Yuan,G Bauer,Z Hu,K Yi,GM Chen,HS Chen,M Chen,F Iemmi,CH Jiang,A Kapoor,H Liao,ZA Liu,F Monti,R Sharma,JN Song,J Tao

Journal

Physical Review Letters

Published Date

2024/1/23

A search for dark matter in events with a displaced nonresonant muon pair and missing transverse momentum is presented. The analysis is performed using an integrated luminosity of 138 fb− 1 of proton-proton (p p) collision data at a center-of-mass energy of 13 TeV produced by the LHC in 2016–2018. No significant excess over the predicted backgrounds is observed. Upper limits are set on the product of the inelastic dark matter production cross section σ (p p→ A′→ χ 1 χ 2) and the decay branching fraction B (χ 2→ χ 1 μ+ μ−), where A′ is a dark photon and χ 1 and χ 2 are states in the dark sector with near mass degeneracy. This is the first dedicated collider search for inelastic dark matter.

See List of Professors in Hesham El Faham University(Université Catholique de Louvain)

Hesham El Faham FAQs

What is Hesham El Faham's h-index at Université Catholique de Louvain?

The h-index of Hesham El Faham has been 33 since 2020 and 33 in total.

What are Hesham El Faham's top articles?

The articles with the titles of