Артём Маевский
National Research University Higher School of Economics
H-index: 183
Europe-Russia
About Артём Маевский
Артём Маевский, With an exceptional h-index of 183 and a recent h-index of 139 (since 2020), a distinguished researcher at National Research University Higher School of Economics, specializes in the field of физика высоких энергий, машинное обучение.
His recent articles reflect a diverse array of research interests and contributions to the field:
A search for rare B→ Dμ+ μ− decays
Helium identification with LHCb
First observation of the decay
Measurement of using the decay mode
Observation of the decay
arXiv: The LHCb ultra-fast simulation option, Lamarr: design and validation
Measurement of lepton universality parameters in and decays
The LHCb ultra-fast simulation option, Lamarr: design and validation
Артём Маевский Information
University | National Research University Higher School of Economics |
|---|---|
Position | научный сотрудник |
Citations(all) | 127978 |
Citations(since 2020) | 76942 |
Cited By | 83404 |
hIndex(all) | 183 |
hIndex(since 2020) | 139 |
i10Index(all) | 658 |
i10Index(since 2020) | 639 |
University Profile Page | National Research University Higher School of Economics |
Артём Маевский Skills & Research Interests
физика высоких энергий
машинное обучение
Top articles of Артём Маевский
A search for rare B→ Dμ+ μ− decays
Authors
Roel Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,CA Aidala,Z Ajaltouni,S Akar,K Akiba,P Albicocco,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,I Bachiller Perea,S Bachmann,M Bachmayer,JJ Back,A Bailly-reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,J Bhom,L Bian,MS Bieker,NV Biesuz,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,V Bocharnikov,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal,R Caspary,G Casse,M Cattaneo
Journal
Journal of High Energy Physics
Published Date
2024/2
A search for rare B→ Dμ+ μ− decays is performed using proton-proton collision data collected by the LHCb experiment, corresponding to an integrated luminosity of 9 fb− 1. No significant signals are observed in the non-resonant μ+ μ− modes, and upper limits of,, and are set at the 95% confidence level, where f c and f u are the fragmentation fractions of a B meson with a c and u quark respectively in proton-proton collisions. Each result is either the first such measurement or an improvement by three orders of magnitude on an existing limit. Separate upper limits are calculated when the muon pair originates from a J/ψ→ μ+ μ− decay. The branching fraction of multiplied by the fragmentation-fraction ratio is measured to be
Helium identification with LHCb
Authors
Roel Aaij,Ahmed Sameh Wagih Abdelmotteleb,C Abellan Beteta,F Abudinén,Thomas Ackernley,Bernardo Adeva,Marco Adinolfi,P Adlarson,Christina Agapopoulou,Christine Angela Aidala,Ziad Ajaltouni,Simon Akar,Kazuyoshi Akiba,Pietro Albicocco,Johannes Albrecht,Federico Alessio,Michael Alexander,A Alfonso Albero,Zakariya Aliouche,P Alvarez Cartelle,Renaud Amalric,Sandra Amato,Jake Lewis Amey,Yasmine Amhis,Liupan An,Lucio Anderlini,Martin Andersson,Aleksei Andreianov,Pasquale Andreola,Mirco Andreotti,Dimitra Andreou,AA Anelli,Dong Ao,Flavio Archilli,Matteo Argenton,S Arguedas Cuendis,Alexander Artamonov,Marina Artuso,Elie Aslanides,Michele Atzeni,Benjamin Audurier,David Bacher,I Bachiller Perea,Sebastian Bachmann,Marie Bachmayer,JJ Back,A Bailly-reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,IR Barbosa,RJ Barlow,S Barsuk,W Barter,M Bartolini,Fedor Baryshnikov,Jan-Marc Basels,Giovanni Bassi,Baasansuren Batsukh,Alexander Battig,Aurelio Bay,Anja Beck,Maik Becker,Franco Bedeschi,IB Bediaga,Andrew Beiter,Samuel Belin,Violaine Bellee,Konstantin Belous,Ilia Belov,Ivan Belyaev,Gaya Benane,Giovanni Bencivenni,Eli Ben-Haim,Alexander Berezhnoy,Roland Bernet,S Bernet Andres,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,J Bex,Ia Bezshyiko,J Bhom,MS Bieker,NV Biesuz,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,V Bocharnikov,JA Boelhauve,O Boente Garcia,T Boettcher,A Bohare,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,N Breer,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,M Calvi,M Calvo Gomez,J Cambon Bouzas,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,R Caravaca-Mora,A Carbone
Journal
Journal of Instrumentation
Published Date
2024/2/1
The identification of helium nuclei at LHCb is achieved using a method based on measurements of ionisation losses in the silicon sensors and timing measurements in the Outer Tracker drift tubes. The background from photon conversions is reduced using the RICH detectors and an isolation requirement. The method is developed using ???????? collision data at
First observation of the decay
Authors
Roel Aaij,Ahmed Sameh Wagih Abdelmotteleb,C Abellan Beteta,F Abudinén,Thomas Ackernley,Bernardo Adeva,Marco Adinolfi,Hossein Afsharnia,Christina Agapopoulou,Christine Angela Aidala,Salvatore Aiola,Ziad Ajaltouni,Simon Akar,Kazuyoshi Akiba,Johannes Albrecht,Federico Alessio,Michael Alexander,A Alfonso Albero,Zakariya Aliouche,P Alvarez Cartelle,Renaud Amalric,Sandra Amato,Jake Lewis Amey,Yasmine Amhis,Liupan An,Lucio Anderlini,Martin Andersson,Aleksei Andreianov,Mirco Andreotti,Dimitra Andreou,Dong Ao,Flavio Archilli,Alexander Artamonov,Marina Artuso,Elie Aslanides,Michele Atzeni,Benjamin Audurier,Sebastian Bachmann,Marie Bachmayer,JJ Back,Aurelien Bailly-Reyre,P Baladron Rodriguez,Vladislav Balagura,Wander Baldini,J Baptista de Souza Leite,Matteo Barbetti,RJ Barlow,Sergey Barsuk,William Barter,Matteo Bartolini,Fedor Baryshnikov,Jan-Marc Basels,Giovanni Bassi,Baasansuren Batsukh,Alexander Battig,Aurelio Bay,Anja Beck,Maik Becker,Franco Bedeschi,IB Bediaga,Andrew Beiter,Vladislav Belavin,Samuel Belin,Violaine Bellee,Konstantin Belous,Ilia Belov,Ivan Belyaev,Gaya Benane,Giovanni Bencivenni,Eli Ben-Haim,Alexander Berezhnoy,Roland Bernet,S Bernet Andres,Daniel Berninghoff,Harris Conan Bernstein,Claudia Bertella,Alessandro Bertolin,Christopher Betancourt,Federico Betti,Ia Bezshyiko,Srishti Bhasin,Jihyun Bhom,Lingzhu Bian,Martin Stefan Bieker,Nicolo Vladi Biesuz,Simone Bifani,Pierre Billoir,Alice Biolchini,Matthew Birch,Fionn Caitlin Ros Bishop,Alexander Bitadze,Andrea Bizzeti,Michele Piero Blago,Thomas Blake,Frederic Blanc,Steven Blusk,Dana Bobulska,Julian Alexander Boelhauve,O Boente Garcia,Thomas Boettcher,Alexey Boldyrev,CS Bolognani,Riccardo Bolzonella,Nikolay Bondar,Federica Borgato,Silvia Borghi,Martino Borsato,Jozef Tomasz Borsuk,Sonia Amina Bouchiba,TJV Bowcock,Alexandre Boyer,Concezio Bozzi,Matthew John Bradley,Svende Braun,A Brea Rodriguez,Jolanta Brodzicka,A Brossa Gonzalo,J Brown,Davide Brundu,Annarita Buonaura,Laura Buonincontri,Aodhan Tomas Burke,Christopher Burr,Albert Bursche,Anatoly Butkevich,Jordy Sebastiaan Butter,Jan Buytaert,Wiktor Byczynski,Sandro Cadeddu,Hao Cai,Roberto Calabrese,Lukas Calefice,Stefano Cali,Ryan Calladine,Marta Calvi,M Calvo Gomez,Pierluigi Campana,DH Campora Perez,AF Campoverde Quezada,Simone Capelli,Lorenzo Capriotti,Angelo Carbone,Giovanni Carboni,Roberta Cardinale,Alessandro Cardini,Ina Carli,Paolo Carniti,L Carus,A Casais Vidal,Rowina Caspary
Journal
Physical Review D
Published Date
2023/8/14
The B+→ D s+ D s− K+ decay is observed for the first time using proton-proton collision data collected by the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb− 1. Its branching fraction relative to that of the B+→ D+ D− K+ decay is measured to be B (B+→ D s+ D s− K+) B (B+→ D+ D− K+)= 0.525±0.033±0.027±0.034, where the first uncertainty is statistical, the second systematic, and the third is due to the uncertainties on the branching fractions of the D s±→ K∓ K±π±and D±→ K∓ π±π±decays. This measurement fills an experimental gap in the knowledge of the family of Cabibbo-favored b→ c c s transitions and opens the path for unique studies of spectroscopy in future.
Measurement of using the decay mode
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,H Afsharnia,C Agapopoulou,CA Aidala,S Aiola,Z Ajaltouni,S Akar,K Akiba,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,V Belavin,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,N Bondar,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Camargo Magalhaes,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,I Carli,P Carniti,L Carus,A Casais Vidal,R Caspary,G Casse,M Cattaneo,G Cavallero,V Cavallini
Journal
The European Physical Journal C
Published Date
2023/7/17
Using a proton–proton collision data sample collected by the LHCb detector and corresponding to an integrated luminosity of , the lifetime of the light mass eigenstate, , is measured using the decay mode to be \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\begin{aligned} \tau _{\text {L}} = 1.445 \pm 0.016 \text {(stat)} \pm 0.008 \text {(syst)} \,\text {ps}. \end{aligned}$$\end{document}A combination of this result with a previous LHCb analysis using an independent dataset corresponding to 3 fb of integrated luminosity gives \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb …
Observation of the decay
Authors
Roel Aaij,Ahmed Sameh Wagih Abdelmotteleb,C Abellan Beteta,F Abudinén,Thomas Ackernley,JA Adams,AA Adefisoye,Bernardo Adeva,Marco Adinolfi,P Adlarson,Christina Agapopoulou,Christine Angela Aidala,Ziad Ajaltouni,Simon Akar,Kazuyoshi Akiba,Pietro Albicocco,Johannes Albrecht,Federico Alessio,Michael Alexander,Zakariya Aliouche,P Alvarez Cartelle,Renaud Amalric,Sandra Amato,Jake Lewis Amey,Yasmine Amhis,Liupan An,Lucio Anderlini,Martin Andersson,Aleksei Andreianov,Pasquale Andreola,Mirco Andreotti,Dimitra Andreou,Alessia Anelli,Dong Ao,Flavio Archilli,Matteo Argenton,S Arguedas Cuendis,Alexander Artamonov,Marina Artuso,Elie Aslanides,Michele Atzeni,Benjamin Audurier,David Bacher,I Bachiller Perea,Sebastian Bachmann,Marie Bachmayer,JJ Back,P Baladron Rodriguez,Vladislav Balagura,Wander Baldini,J Leite,Matteo Barbetti,Ivanildo Rui Barbosa,RJ Barlow,Sergey Barsuk,William Barter,Matteo Bartolini,Justin Bartz,Fedor Baryshnikov,Jan-Marc Basels,Giovanni Bassi,Baasansuren Batsukh,Alexander Battig,Aurelio Bay,Anja Beck,Maik Becker,Franco Bedeschi,IB Bediaga,Andrew Beiter,Samuel Belin,Violaine Bellee,Konstantin Belous,Ilia Belov,Ivan Belyaev,Gaya Benane,Giovanni Bencivenni,Eli Ben-Haim,Alexander Berezhnoy,Roland Bernet,S Bernet Andres,Claudia Bertella,Alessandro Bertolin,Christopher Betancourt,Federico Betti,Josh Bex,Ia Bezshyiko,Jihyun Bhom,Martin Stefan Bieker,Nicolo Vladi Biesuz,Pierre Billoir,Alice Biolchini,Matthew Birch,Fionn Caitlin Ros Bishop,Alexander Bitadze,Andrea Bizzeti,Thomas Blake,Frederic Blanc,Jonah Evan Blank,Steven Blusk,Vladimir Bocharnikov,Julian Alexander Boelhauve,O Boente Garcia,Thomas Boettcher,Abhishek Bohare,Alexey Boldyrev,CS Bolognani,Riccardo Bolzonella,Nikolay Bondar,Federica Borgato,Silvia Borghi,Martino Borsato,Jozef Tomasz Borsuk,Sonia Amina Bouchiba,TJV Bowcock,Alexandre Boyer,Concezio Bozzi,Matthew John Bradley,A Brea Rodriguez,Nils Breer,Jolanta Brodzicka,A Brossa Gonzalo,J Brown,Davide Brundu,Emma Buchanan,Annarita Buonaura,Laura Buonincontri,Aodhan Tomas Burke,Christopher Burr,Albert Bursche,Anatoly Butkevich,Jordy Sebastiaan Butter,Jan Buytaert,Wiktor Byczynski,Sandro Cadeddu,Hao Cai,Roberto Calabrese,Lukas Calefice,Stefano Cali,Marta Calvi,M Calvo Gomez,J Cambon Bouzas,Pierluigi Campana,DH Perez,AF Quezada,Simone Capelli,Lorenzo Capriotti,R Caravaca-Mora,Angelo Carbone,L Carcedo Salgado,Roberta Cardinale
Journal
arXiv preprint arXiv:2402.05523
Published Date
2024/2/8
The first observation of the decay is reported with high significance using proton-proton collision data, corresponding to an integrated luminosity of 9fb, collected with the LHCb detector at centre-of-mass energies of 7, 8, and 13 TeV. The ratio of its branching fraction relative to the channel is measured to be $$ \frac{ {\cal{B}}( B_c^+ \to J/\psi \pi^+\pi^0 ) } { {\cal{B}}( B_c^+ \to J/\psi \pi^+ ) } = 2.80 \pm 0.15 \pm 0.11 \pm 0.16 \,, $$ where the first uncertainty is statistical, the second systematic and the third related to imprecise knowledge of the branching fractions for and decays, which are used to determine the detection efficiency. The mass spectrum is found to be consistent with the dominance of an intermediate contribution in accordance with a model based on QCD factorisation.
arXiv: The LHCb ultra-fast simulation option, Lamarr: design and validation
Authors
Lucio Anderlini,Zehua Xu,Denis Derkach,Nikita Kazeev,Gloria Corti,Benedetto Gianluca Siddi,Maurizio Martinelli,Artem Maevskiy,Sergei Mokonenko,Simone Capelli,Adam Davis,Matteo Barbetti
Published Date
2023/9/22
Detailed detector simulation is the major consumer of CPU resources at LHCb, having used more than 90% of the total computing budget during Run 2 of the Large Hadron Collider at CERN. As data is collected by the upgraded LHCb detector during Run 3 of the LHC, larger requests for simulated data samples are necessary, and will far exceed the pledged resources of the experiment, even with existing fast simulation options. An evolution of technologies and techniques to produce simulated samples is mandatory to meet the upcoming needs of analysis to interpret signal versus background and measure efficiencies. In this context, we propose Lamarr, a Gaudi-based framework designed to offer the fastest solution for the simulation of the LHCb detector. Lamarr consists of a pipeline of modules parameterizing both the detector response and the reconstruction algorithms of the LHCb experiment. Most of the parameterizations are made of Deep Generative Models and Gradient Boosted Decision Trees trained on simulated samples or alternatively, where possible, on real data. Embedding Lamarr in the general LHCb Gauss Simulation framework allows combining its execution with any of the available generators in a seamless way. Lamarr has been validated by comparing key reconstructed quantities with Detailed Simulation. Good agreement of the simulated distributions is obtained with two-order-of-magnitude speed-up of the simulation phase.
Measurement of lepton universality parameters in and decays
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,CA Aidala,Z Ajaltouni,S Akar,K Akiba,P Albicocco,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,IB Bachiller Perea,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal,R Caspary,G Casse
Journal
Physical Review D
Published Date
2023/8/2
A simultaneous analysis of the B+→ K+ ℓ+ ℓ− and B 0→ K* 0 ℓ+ ℓ− decays is performed to test muon-electron universality in two ranges of the square of the dilepton invariant mass, q 2. The measurement uses a sample of beauty meson decays produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb− 1. A sequence of multivariate selections and strict particle identification requirements produce a higher signal purity and a better statistical sensitivity per unit luminosity than previous LHCb lepton universality tests using the same decay modes. Residual backgrounds due to misidentified hadronic decays are studied using data and included in the fit model. Each of the four lepton universality measurements reported is either the first in the given q 2 interval or supersedes previous LHCb measurements. The results are compatible …
The LHCb ultra-fast simulation option, Lamarr: design and validation
Authors
Lucio Anderlini,Matteo Barbetti,Simone Capelli,Gloria Corti,Adam Davis,Denis Derkach,Nikita Kazeev,Artem Maevskiy,Maurizio Martinelli,Sergei Mokonenko,Benedetto Gianluca Siddi,Zehua Xu
Journal
arXiv preprint arXiv:2309.13213
Published Date
2023/9/22
Detailed detector simulation is the major consumer of CPU resources at LHCb, having used more than 90% of the total computing budget during Run 2 of the Large Hadron Collider at CERN. As data is collected by the upgraded LHCb detector during Run 3 of the LHC, larger requests for simulated data samples are necessary, and will far exceed the pledged resources of the experiment, even with existing fast simulation options. An evolution of technologies and techniques to produce simulated samples is mandatory to meet the upcoming needs of analysis to interpret signal versus background and measure efficiencies. In this context, we propose Lamarr, a Gaudi-based framework designed to offer the fastest solution for the simulation of the LHCb detector. Lamarr consists of a pipeline of modules parameterizing both the detector response and the reconstruction algorithms of the LHCb experiment. Most of the parameterizations are made of Deep Generative Models and Gradient Boosted Decision Trees trained on simulated samples or alternatively, where possible, on real data. Embedding Lamarr in the general LHCb Gauss Simulation framework allows combining its execution with any of the available generators in a seamless way. Lamarr has been validated by comparing key reconstructed quantities with Detailed Simulation. Good agreement of the simulated distributions is obtained with two-order-of-magnitude speed-up of the simulation phase.
First observation and branching fraction measurement of the decay
Authors
Roel Aaij,Ahmed Sameh Wagih Abdelmotteleb,Carlos Abellan Beteta,F Abudinén,Thomas Ackernley,Bernardo Adeva,Marco Adinolfi,P Adlarson,Hossein Afsharnia,Christina Agapopoulou,Christine Angela Aidala,Ziad Ajaltouni,Simon Akar,Kazuyoshi Akiba,Pietro Albicocco,Johannes Albrecht,Federico Alessio,Michael Alexander,A Alfonso Albero,Zakariya Aliouche,P Alvarez Cartelle,Renaud Amalric,Sandra Amato,Jake Lewis Amey,Yasmine Amhis,Liupan An,Lucio Anderlini,Martin Andersson,Aleksei Andreianov,Mirco Andreotti,Dimitra Andreou,Dong Ao,Flavio Archilli,Alexander Artamonov,Marina Artuso,Elie Aslanides,Michele Atzeni,Benjamin Audurier,IB Bachiller Perea,Sebastian Bachmann,Marie Bachmayer,JJ Back,Aurelien Bailly-Reyre,P Baladron Rodriguez,Vladislav Balagura,Wander Baldini,J Baptista de Souza Leite,Matteo Barbetti,RJ Barlow,Sergey Barsuk,William Barter,Matteo Bartolini,Fedor Baryshnikov,Jan-Marc Basels,Giovanni Bassi,Baasansuren Batsukh,Alexander Battig,Aurelio Bay,Anja Beck,Maik Becker,Franco Bedeschi,IB Bediaga,Andrew Beiter,Samuel Belin,Violaine Bellee,Konstantin Belous,Ilia Belov,Ivan Belyaev,Gaya Benane,Giovanni Bencivenni,Eli Ben-Haim,Alexander Berezhnoy,Roland Bernet,S Bernet Andres,Daniel Berninghoff,Harris Conan Bernstein,Claudia Bertella,Alessandro Bertolin,Christopher Betancourt,Federico Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal,R Caspary,G Casse,M Cattaneo
Journal
Journal of High Energy Physics
Published Date
2023/7
The first observation of the decay is presented using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of= 13 TeV, corresponding to a total integrated luminosity of 6 fb− 1. Using the decay as the normalisation mode, the branching fraction of the decay is measured to be\(\mathcal {B}\left ({\Lambda} _b^ 0\to {D} _s^{-} p\right)=\left (12.6\pm 0.5\pm 0.3\pm 1.2\right)\times {10}^{-6}\), where the first uncertainty is statistical, the second systematic and the third due to uncertainties in the branching fractions of the, and decays.
Generative surrogates for fast simulation: TPC case
Authors
Fedor Ratnikov,Artem Maevskiy,Alexander Zinchenko,Victor Riabov,Alexey Sukhorosov,Dmitrii Evdokimov
Journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Published Date
2023/2/1
Simulation of High Energy Physics experiments is widely used, necessary for both detector and physics studies. Detailed Monte-Carlo simulation algorithms are often limited due to the computational complexity of such methods, and therefore faster approaches are desired. Generative Adversarial Networks (GANs) are well suited for aggregating a number of detailed simulation steps into a surrogate probability density estimator readily available for fast sampling. In this work, we demonstrate the power of the GAN-based fast simulation model on the use case of simulating the response for the Time Projection Chamber (TPC) in the MPD experiment at the NICA accelerator complex. We show that our model can generate high-fidelity TPC responses, while accelerating the TPC simulation by at least an order of magnitude. We describe alternative representation approaches for this problem and also outline the roadmap …
Test of Lepton Universality in Decays
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,CA Aidala,Z Ajaltouni,S Akar,K Akiba,P Albicocco,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,I Bachiller Perea,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal,R Caspary,G Casse
Journal
Physical review letters
Published Date
2023/8/2
The first simultaneous test of muon-electron universality using B+→ K+ ℓ+ ℓ− and B 0→ K* 0 ℓ+ ℓ− decays is performed, in two ranges of the dilepton invariant-mass squared, q 2. The analysis uses beauty mesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of 9 fb− 1. Each of the four lepton universality measurements reported is either the first in the given q 2 interval or supersedes previous LHCb measurements. The results are compatible with the predictions of the Standard Model.
The LHCb ultra-fast simulation option, Lamarr
Authors
Lucio Anderlini,Matteo Barbetti,Simone Capelli,Gloria Corti,Adam Davis,Denis Derkach,Nikita Kazeev,Artem Maevskiy,Maurizio Martinelli,Sergei Mokonenko
Journal
arXiv preprint arXiv:2309.13213
Published Date
2023/9
Detailed detector simulation is the major consumer of CPU resources at LHCb, having used more than 90% of the total computing budget during Run 2 of the Large Hadron Collider at CERN. As data is collected by the upgraded LHCb detector during Run 3 of the LHC, larger requests for simulated data samples are necessary, and will far exceed the pledged resources of the experiment, even with existing fast simulation options. An evolution of technologies and techniques to produce simulated samples is mandatory to meet the upcoming needs of analysis to interpret signal versus background and measure efficiencies. In this context, we propose Lamarr, aGaudi-based framework designed to offer the fastest solution for the simulation of the LHCb detector. Lamarr consists of a pipeline of modules parameterizing both the detector response and the reconstruction algorithms of the LHCb experiment. Most of the parameterizations are made of Deep Generative Models and Gradient Boosted Decision Trees trained on simulated samples or alternatively, where possible, on real data. Embedding Lamarr in the general LHCb Gauss Simulation framework allows combining its execution with any of the available generators in a seamless way. Lamarr has been validated by comparing key reconstructed quantities with Detailed Simulation. Good agreement of the simulated distributions is obtained with two-order-of-magnitude speed-up of the simulation phase.
Towards reliable neural generative modeling of detectors
Authors
Lucio Anderlini,Matteo Barbetti,Denis Derkach,Nikita Kazeev,Artem Maevskiy,Sergei Mokhnenko,LHCb collaboration
Journal
Journal of Physics: Conference Series
Published Date
2023/2/1
The increasing luminosities of future data taking at Large Hadron Collider and next generation collider experiments require an unprecedented amount of simulated events to be produced. Such large scale productions demand a significant amount of valuable computing resources. This brings a demand to use new approaches to event generation and simulation of detector responses. In this paper, we discuss the application of generative adversarial networks (GANs) to the simulation of the LHCb experiment events. We emphasize main pitfalls in the application of GANs and study the systematic effects in detail. The presented results are based on the Geant4 simulation of the LHCb Cherenkov detector.
Measurement of the CKM angle γ with B±→ D [K∓ π±π±π∓] h±decays using a binned phase-space approach
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,H Afsharnia,C Agapopoulou,CA Aidala,S Aiola,Z Ajaltouni,S Akar,K Akiba,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,V Belavin,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,I Carli,P Carniti,L Carus,A Casais Vidal,R Caspary
Journal
Journal of High Energy Physics
Published Date
2023/7
The CKM angle γ is determined from CP-violating observables measured in B±→ D [K∓ π±π±π∓] h±,(h= K, π) decays, where the measurements are performed in bins of the decay phase-space of the D meson. Using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to a total integrated luminosity of 9 fb− 1, γ is determined to be
Amplitude analysis of and decays
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,CA Aidala,S Aiola,Z Ajaltouni,S Akar,K Akiba,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,V Belavin,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal
Journal
Physical Review D
Published Date
2023/7/27
Resonant contributions in B 0→ DD 0 s+ π− and B+→ D− D s+ π+ decays are determined with an amplitude analysis, which is performed both separately and simultaneously, where in the latter case isospin symmetry between the decays is assumed. The analysis is based on data collected by the LHCb detector in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV. The full data sample corresponds to an integrated luminosity of 9 fb− 1. A doubly charged spin-0 open-charm tetraquark candidate together with a neutral partner, both with masses near 2.9 GeV, are observed in the D s π decay channel.
Generative Adversarial Networks for the fast simulation of the Time Projection Chamber responses at the MPD detector
Authors
Artem Maevskiy,Fedor Ratnikov,A Zinchenko,V Riabov,A Sukhorosov,D Evdokimov
Journal
Journal of Physics: Conference Series
Published Date
2023/2/1
Detailed detector simulation models are vital for the successful operation of modern high-energy physics experiments. In most cases, running detailed models requires a significant amount of computing resources. It is desired to have approaches that are less resource-intensive. In this work, we demonstrate the applicability of Generative Adversarial Networks (GAN) as a basis for such fast-simulation models for the case of the Time Projection Chamber (TPC) at the MPD detector at the NICA accelerator complex. Our prototype GAN-based model of TPC works faster than the detailed simulation in an order of magnitude without any noticeable drop in the quality of the high-level reconstruction characteristics for the generated data. Approaches with direct and indirect quality metrics optimization are compared.
Search for the doubly heavy baryon decaying to
Authors
Roel Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,H Afsharnia,C Agapopoulou,CA Aidala,S Aiola,Z Ajaltouni,S Akar,K Akiba,J Albrecht,F Alessio,Michael Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,V Belavin,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,S Blusk,Dana Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,N Bondar,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Camargo Magalhaes,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,I Carli,P Carniti,L Carus,A Casais Vidal,R Caspary,G Casse,M Cattaneo,G Cavallero,V Cavallini,S Celani,J Cerasoli
Journal
Chinese Physics C
Published Date
2023/9/1
A first search for the decay is performed by the LHCb experiment with a data sample of proton-proton collisions, corresponding to an integrated luminosity of 9 fb− 1 recorded at centre-of-mass energies of 7, 8, and 13 TeV. Two peaking structures are seen with a local (global) significance of and standard deviations at masses of 6571 and 6694 MeV/, respectively. Upper limits are set on the baryon production cross-section times the branching fraction relative to that of the decay at centre-of-mass energies of 8 and 13 TeV, in the and in the rapidity and transverse-momentum ranges from 2.0 to 4.5 and 0 to, respectively. Upper limits are presented as a function of the mass and lifetime.
Amplitude analysis of the → π−π+π+ decay
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,CA Aidala,Z Ajaltouni,S Akar,K Akiba,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,M Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,V Belavin,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal,R Caspary
Journal
Journal of High Energy Physics
Published Date
2023/7
A Dalitz plot analysis of the→ π− π+ π+ decay is presented. The analysis is based on proton-proton collision data recorded by the LHCb experiment at a centre-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 1.5 fb− 1. The resonant structure of the decay is obtained using a quasi-model-independent partial-wave analysis, in which the π+ π− S-wave amplitude is parameterised as a generic complex function determined by a fit to the data. The S-wave component is found to be dominant, followed by the contribution from spin-2 resonances and a small contribution from spin-1 resonances. The latter includes the first observation of the→ ω (782) π+ channel in the→ π− π+ π+ decay. The resonant structures of the→ π− π+ π+ and D+→ π− π+ π+ decays are compared, providing information about the mechanisms for the hadron formation in these decays.
First observation of a doubly charged tetraquark and its neutral partner
Authors
R Aaij,ASW Abdelmotteleb,C Abellan Beteta,F Abudinén,T Ackernley,B Adeva,M Adinolfi,P Adlarson,H Afsharnia,C Agapopoulou,CA Aidala,S Aiola,Z Ajaltouni,S Akar,K Akiba,J Albrecht,F Alessio,M Alexander,A Alfonso Albero,Z Aliouche,P Alvarez Cartelle,R Amalric,S Amato,JL Amey,Y Amhis,L An,L Anderlini,M Andersson,A Andreianov,M Andreotti,D Andreou,D Ao,F Archilli,A Artamonov,M Artuso,E Aslanides,M Atzeni,B Audurier,S Bachmann,Marie Bachmayer,JJ Back,A Bailly-Reyre,P Baladron Rodriguez,V Balagura,W Baldini,J Baptista de Souza Leite,M Barbetti,RJ Barlow,S Barsuk,W Barter,M Bartolini,F Baryshnikov,JM Basels,G Bassi,B Batsukh,A Battig,A Bay,A Beck,M Becker,F Bedeschi,IB Bediaga,A Beiter,V Belavin,S Belin,V Bellee,K Belous,I Belov,I Belyaev,G Benane,G Bencivenni,E Ben-Haim,A Berezhnoy,R Bernet,S Bernet Andres,D Berninghoff,HC Bernstein,C Bertella,A Bertolin,C Betancourt,F Betti,Ia Bezshyiko,S Bhasin,J Bhom,L Bian,MS Bieker,NV Biesuz,S Bifani,P Billoir,A Biolchini,M Birch,FCR Bishop,A Bitadze,A Bizzeti,MP Blago,T Blake,F Blanc,JE Blank,S Blusk,D Bobulska,JA Boelhauve,O Boente Garcia,T Boettcher,A Boldyrev,CS Bolognani,R Bolzonella,N Bondar,F Borgato,S Borghi,M Borsato,JT Borsuk,SA Bouchiba,TJV Bowcock,A Boyer,C Bozzi,MJ Bradley,S Braun,A Brea Rodriguez,J Brodzicka,A Brossa Gonzalo,J Brown,D Brundu,A Buonaura,L Buonincontri,AT Burke,C Burr,A Bursche,A Butkevich,JS Butter,J Buytaert,W Byczynski,S Cadeddu,H Cai,R Calabrese,L Calefice,S Cali,R Calladine,M Calvi,M Calvo Gomez,P Campana,DH Campora Perez,AF Campoverde Quezada,S Capelli,L Capriotti,A Carbone,G Carboni,R Cardinale,A Cardini,P Carniti,L Carus,A Casais Vidal
Journal
Physical review letters
Published Date
2023/7/27
A combined amplitude analysis is performed for the decays B 0→ DD 0 s+ π− and B+→ D− D s+ π+, which are related by isospin symmetry. The analysis is based on data collected by the LHCb detector in proton-proton collisions at center-of-mass energies of 7, 8, and 13 TeV. The full data sample corresponds to an integrated luminosity of 9 fb− 1. Two new resonant states with masses of 2.908±0.011±0.020 GeV and widths of 0.136±0.023±0.013 GeV are observed, which decay to D s+ π+ and D s+ π− respectively. The former state indicates the first observation of a doubly charged open-charm tetraquark state with minimal quark content [c s u d], and the latter state is a neutral tetraquark composed of [c s u d] quarks. Both states are found to have spin-parity of 0+, and their resonant parameters are consistent with each other, which suggests that they belong to an isospin triplet.
A full detector description using neural network driven simulation
Authors
Fedor Ratnikov,Alexander Rogachev,Sergey Mokhnenko,Artem Maevskiy,Denis Derkach,Adam Davis,Nikita Kazeev,Lucio Anderlini,Matteo Barbetti,Benedetto Gianluca Siddi
Journal
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Published Date
2023/1/11
The abundance of data arriving in the new runs of the Large Hadron Collider creates tough requirements for the amount of necessary simulated events and thus for the speed of generating such events. Current approaches can suffer from long generation time and lack of important storage resources to preserve the simulated datasets. The development of the new fast generation techniques is thus crucial for the proper functioning of experiments. We present a novel approach to simulate LHCb detector events using generative machine learning algorithms and other statistical tools. The approaches combine the speed and flexibility of neural networks and encapsulates knowledge about the detector in the form of statistical patterns. Whenever possible, the algorithms are trained using real data, which enhances their robustness against differences between real data and simulation. We discuss particularities of neural …
Артём Маевский FAQs
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The h-index of Артём Маевский has been 139 since 2020 and 183 in total.
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The articles with the titles of
A search for rare B→ Dμ+ μ− decays
Helium identification with LHCb
First observation of the decay
Measurement of using the decay mode
Observation of the decay
arXiv: The LHCb ultra-fast simulation option, Lamarr: design and validation
Measurement of lepton universality parameters in and decays
The LHCb ultra-fast simulation option, Lamarr: design and validation
...
are the top articles of Артём Маевский at National Research University Higher School of Economics.
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The research interests of Артём Маевский are: физика высоких энергий, машинное обучение
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