Thomas Koffas

Carleton University

H-index: 234

North America-Canada

About Thomas Koffas

Thomas Koffas, With an exceptional h-index of 234 and a recent h-index of 165 (since 2020), a distinguished researcher at Carleton University, specializes in the field of Physics, Experimental High Energy Physics, Neutrinos, Higgs, Detector Development.

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

GWTC-2.1: Deep extended catalog of compact binary coalescences observed by LIGO and Virgo during the first half of the third observing run

GWTC-3: compact binary coalescences observed by LIGO and Virgo during the second part of the third observing run

Specifications and pre-production of n+-in-p large-format strip sensors fabricated in 6-inch silicon wafers, ATLAS18, for the Inner Tracker of the ATLAS Detector for High …

Analysis of humidity sensitivity of silicon strip sensors for ATLAS upgrade tracker, pre-and post-irradiation

Search for MeV electron recoils from dark matter in EXO-200

Search for electroweak production of charginos and neutralinos in proton-proton collisions at = 13 TeV

Measurement of Higgs boson decay into b-quarks in associated production with a top-quark pair in pp collisions at = 13 TeV with the ATLAS detector

Search for strongly interacting massive particles generating trackless jets in proton–proton collisions at

Thomas Koffas Information

University	Carleton University
Position	Professor of Physics
Citations(all)	315144
Citations(since 2020)	160144
Cited By	187946
hIndex(all)	234
hIndex(since 2020)	165
i10Index(all)	1314
i10Index(since 2020)	1188
Email	Access Email
University Profile Page	Carleton University

Thomas Koffas Skills & Research Interests

Physics

Experimental High Energy Physics

Neutrinos

Higgs

Detector Development

Top articles of Thomas Koffas

GWTC-2.1: Deep extended catalog of compact binary coalescences observed by LIGO and Virgo during the first half of the third observing run

Authors

R Abbott,TD Abbott,F Acernese,K Ackley,C Adams,N Adhikari,RX Adhikari,VB Adya,C Affeldt,D Agarwal,M Agathos,K Agatsuma,N Aggarwal,OD Aguiar,L Aiello,A Ain,P Ajith,S Albanesi,A Allocca,PA Altin,A Amato,C Anand,S Anand,A Ananyeva,SB Anderson,WG Anderson,T Andrade,N Andres,T Andrić,SV Angelova,S Ansoldi,JM Antelis,S Antier,S Appert,K Arai,MC Araya,JS Areeda,M Arène,N Arnaud,SM Aronson,KG Arun,Y Asali,G Ashton,M Assiduo,SM Aston,P Astone,F Aubin,C Austin,S Babak,F Badaracco,MKM Bader,C Badger,S Bae,AM Baer,S Bagnasco,Y Bai,J Baird,M Ball,G Ballardin,SW Ballmer,A Balsamo,G Baltus,S Banagiri,D Bankar,JC Barayoga,C Barbieri,BC Barish,D Barker,P Barneo,F Barone,B Barr,L Barsotti,M Barsuglia,D Barta,J Bartlett,MA Barton,I Bartos,R Bassiri,A Basti,M Bawaj,JC Bayley,AC Baylor,M Bazzan,B Bécsy,VM Bedakihale,M Bejger,I Belahcene,V Benedetto,D Beniwal,TF Bennett,JD Bentley,M Benyaala,F Bergamin,BK Berger,S Bernuzzi,CPL Berry,D Bersanetti,A Bertolini,J Betzwieser,D Beveridge,R Bhandare,U Bhardwaj,D Bhattacharjee,S Bhaumik,IA Bilenko,G Billingsley,S Bini,R Birney,O Birnholtz,S Biscans,M Bischi,S Biscoveanu,A Bisht,B Biswas,M Bitossi,M-A Bizouard,JK Blackburn,CD Blair,DG Blair,RM Blair,F Bobba,N Bode,M Boer,G Bogaert,M Boldrini,LD Bonavena,F Bondu,E Bonilla,R Bonnand,P Booker,BA Boom,R Bork,V Boschi,N Bose,S Bose,V Bossilkov,V Boudart,Y Bouffanais,A Bozzi,C Bradaschia,PR Brady,A Bramley,A Branch,M Branchesi,JE Brau,M Breschi,T Briant,JH Briggs,A Brillet,M Brinkmann

Journal

Physical Review D

Published Date

2024/1/5

The second Gravitational-Wave Transient Catalog, GWTC-2, reported on 39 compact binary coalescences observed by the Advanced LIGO and Advanced Virgo detectors between 1 April 2019 15∶ 00 UTC and 1 October 2019 15∶ 00 UTC. Here, we present GWTC-2.1, which reports on a deeper list of candidate events observed over the same period. We analyze the final version of the strain data over this period with improved calibration and better subtraction of excess noise, which has been publicly released. We employ three matched-filter search pipelines for candidate identification, and estimate the probability of astrophysical origin for each candidate event. While GWTC-2 used a false alarm rate threshold of 2 per year, we include in GWTC-2.1, 1201 candidates that pass a false alarm rate threshold of 2 per day. We calculate the source properties of a subset of 44 high-significance candidates that have a …

GWTC-3: compact binary coalescences observed by LIGO and Virgo during the second part of the third observing run

Authors

Richard Abbott,TD Abbott,F Acernese,K Ackley,C Adams,N Adhikari,RX Adhikari,VB Adya,C Affeldt,D Agarwal,M Agathos,Kazuhiro Agatsuma,N Aggarwal,OD Aguiar,L Aiello,A Ain,P Ajith,S Akcay,T Akutsu,S Albanesi,A Allocca,PA Altin,A Amato,C Anand,S Anand,A Ananyeva,SB Anderson,WG Anderson,M Ando,T Andrade,N Andres,T Andrić,SV Angelova,S Ansoldi,JM Antelis,S Antier,S Appert,Koji Arai,Koya Arai,Y Arai,S Araki,A Araya,MC Araya,JS Areeda,M Arène,N Aritomi,N Arnaud,M Arogeti,SM Aronson,KG Arun,H Asada,Y Asali,G Ashton,Y Aso,M Assiduo,SM Aston,P Astone,F Aubin,C Austin,S Babak,F Badaracco,MKM Bader,C Badger,S Bae,Y Bae,AM Baer,S Bagnasco,Y Bai,L Baiotti,J Baird,R Bajpai,M Ball,G Ballardin,SW Ballmer,A Balsamo,G Baltus,S Banagiri,D Bankar,JC Barayoga,C Barbieri,BC Barish,D Barker,P Barneo,F Barone,B Barr,L Barsotti,M Barsuglia,D Barta,J Bartlett,MA Barton,I Bartos,R Bassiri,A Basti,M Bawaj,JC Bayley,AC Baylor,M Bazzan,B Bécsy,VM Bedakihale,M Bejger,I Belahcene,V Benedetto,D Beniwal,TF Bennett,JD Bentley,M BenYaala,F Bergamin,BK Berger,S Bernuzzi,CPL Berry,D Bersanetti,A Bertolini,J Betzwieser,D Beveridge,R Bhandare,U Bhardwaj,D Bhattacharjee,S Bhaumik,IA Bilenko,G Billingsley,S Bini,R Birney,O Birnholtz,S Biscans,M Bischi,S Biscoveanu,A Bisht,B Biswas,M Bitossi,M-A Bizouard,JK Blackburn,CD Blair,DG Blair,RM Blair,F Bobba,N Bode,M Boer,G Bogaert,M Boldrini,LD Bonavena,F Bondu,E Bonilla,R Bonnand,P Booker,BA Boom,R Bork,V Boschi,N Bose,S Bose,V Bossilkov

Journal

Physical Review X

Published Date

2023/12/4

The third Gravitational-Wave Transient Catalog (GWTC-3) describes signals detected with Advanced LIGO and Advanced Virgo up to the end of their third observing run. Updating the previous GWTC-2.1, we present candidate gravitational waves from compact binary coalescences during the second half of the third observing run (O3b) between 1 November 2019, 15∶ 00 Coordinated Universal Time (UTC) and 27 March 2020, 17∶ 00 UTC. There are 35 compact binary coalescence candidates identified by at least one of our search algorithms with a probability of astrophysical origin p astro> 0.5. Of these, 18 were previously reported as low-latency public alerts, and 17 are reported here for the first time. Based upon estimates for the component masses, our O3b candidates with p astro> 0.5 are consistent with gravitational-wave signals from binary black holes or neutron-star–black-hole binaries, and we identify …

Specifications and pre-production of n+-in-p large-format strip sensors fabricated in 6-inch silicon wafers, ATLAS18, for the Inner Tracker of the ATLAS Detector for High …

Authors

Yoshinobu Unno,H Abidi,A Affolder,K Affolder,PP Allport,S Beaupre,GA Beck,J Bernabeu,AJ Bevan,A Chisholm,B Ciungu,I Dawson,A Dowling,V Fadeyev,P Federicova,J Fernandez-Tejero,C Fleta,A Fournier,W George,M Gignac,L Gonella,G Greig,J Gunnell,K Hara,S Hirose,B Hommels,T Ishii,C Jessiman,J Johnson,D Jones,S Kachiguin,N Kang,J Keller,C Klein,T Koffas,Ioannis Kopsalis,J Kroll,J Kvasnicka,C Lacasta,V Latonova,J Lomas,F Martinez-Mckinney,M Mikestikova,PS Miyagawa,RS Orr,L Poley,D Rousso,A Shah,C Solaz,U Soldevila,E Staats,TL Stack,B Stelzer,M Ullan,J Yarwick,SC Zenz

Journal

Journal of Instrumentation

Published Date

2023/3/22

The ATLAS experiment is constructing new all-silicon inner tracking system for HL-LHC. The strip detectors cover the radial extent of 40 to 100 cm. A new approach is adopted to use p-type silicon material, making the readout in n+-strips, so-called n+-in-p sensors. This allows for enhanced radiation tolerance against an order of magnitude higher particle fluence compared to the LHC. To cope with varying hit rates and occupancies as a function of radial distance, there are two barrel sensor types, the short strips (SS) for the inner 2 and the long strips (LS) for the outer 2 barrel cylinders, respectively. The barrel sensors exhibit a square, 9.8× 9.8 cm 2, geometry, the largest possible sensor area from a 6-inch wafer. The strips are laid out in parallel with a strip pitch of 75.5 μm and 4 or 2 rows of strip segments. The strips are AC-coupled and biased via polysilicon resistors. The endcap sensors employ a" stereo-annulus" …

Analysis of humidity sensitivity of silicon strip sensors for ATLAS upgrade tracker, pre-and post-irradiation

Authors

Javier Fernández-Tejero,A Affolder,E Bach,MJ Basso,A Bhardwaj,Vladimir Cindro,A Dowling,V Fadeyev,C Fleta,A Fournier,K Hara,A Howe,C Jessiman,J Keller,D Kisliuk,C Klein,T Koffas,J Kroll,V Latonova,K Mahtani,I Mandić,F Martinez-Mckinney,M Mikestikova,K Nakamura,RS Orr,L Poley,E Staats,B Stelzer,J Suzuki,M Ullán,Y Unno,J Yarwick,I Zatocilova,Y Zhou

Journal

Journal of Instrumentation

Published Date

2023/2/13

During the prototyping phase of the new ATLAS Inner-Tracker (ITk) strip sensors, a degradation of the device breakdown voltage at high humidity was observed. Although the degradation was temporary, showing a fast recovery in dry conditions, the study of the influence of humidity on the sensor performance was critical to establish counter-measures and handling protocols during production testing in order to ensure the proper performance of the upgraded detector. The work presented here has the objective to study for the first time the breakdown voltage deterioration in presence of ambient humidity of ATLAS ITk production-layout strip sensors with different surface properties, before and after proton, neutron and gamma irradiations. A study of the humidity sensitivity of miniature ATLAS ITk strip sensors, before and after proton irradiations, is also presented to compare the sensitivity of devices with different sizes …

Search for MeV electron recoils from dark matter in EXO-200

Authors

S Al Kharusi,G Anton,I Badhrees,PS Barbeau,D Beck,V Belov,T Bhatta,M Breidenbach,T Brunner,GF Cao,WR Cen,C Chambers,B Cleveland,M Coon,A Craycraft,T Daniels,L Darroch,SJ Daugherty,J Davis,S Delaquis,A Der Mesrobian-Kabakian,R DeVoe,J Dilling,A Dolgolenko,MJ Dolinski,J Echevers,W Fairbank Jr,D Fairbank,J Farine,S Feyzbakhsh,P Fierlinger,YS Fu,D Fudenberg,P Gautam,R Gornea,G Gratta,C Hall,EV Hansen,J Hoessl,P Hufschmidt,M Hughes,A Iverson,A Jamil,C Jessiman,MJ Jewell,A Johnson,A Karelin,LJ Kaufman,T Koffas,R Krücken,A Kuchenkov,KS Kumar,Y Lan,A Larson,BG Lenardo,DS Leonard,GS Li,S Li,Z Li,C Licciardi,YH Lin,R MacLellan,T McElroy,T Michel,B Mong,DC Moore,K Murray,O Njoya,O Nusair,A Odian,I Ostrovskiy,A Perna,A Piepke,A Pocar,F Retière,AL Robinson,PC Rowson,D Ruddell,J Runge,S Schmidt,D Sinclair,K Skarpaas,AK Soma,V Stekhanov,M Tarka,S Thibado,M Todd,T Tolba,TI Totev,RHM Tsang,B Veenstra,V Veeraraghavan,P Vogel,J-L Vuilleumier,M Wagenpfeil,J Watkins,LJ Wen,U Wichoski,G Wrede,SX Wu,Q Xia,DR Yahne,L Yang,Y-R Yen,O Ya Zeldovich,T Ziegler,EXO-200 Collaboration

Journal

Physical Review D

Published Date

2023/1/30

We present a search for electron-recoil signatures from the charged-current absorption of fermionic dark matter using the EXO-200 detector. We report an average electron-recoil background rate of 6.8× 10 4 cts kg− 1 yr− 1 keV− 1 above 4 MeV and find no statistically significant excess over our background projection. Using a total Xe 136 exposure of 234.1 kg yr, we exclude new parameter space for the charged-current absorption cross section for dark matter masses between m χ= 2.6–11.6 MeV with a minimum of 6× 10− 51 cm 2 at 8.3 MeV at the 90% confidence level.

Search for electroweak production of charginos and neutralinos in proton-proton collisions at = 13 TeV

Authors

Georges Aad,Brad Abbott,Dale Charles Abbott,A Abed Abud,K Abeling,DK Abhayasinghe,SH Abidi,OS AbouZeid,NL Abraham,H Abramowicz,H Abreu,Y Abulaiti,BS Acharya,B Achkar,S Adachi,L Adam,L Adamczyk,L Adamek,J Adelman,M Adersberger,A Adiguzel,S Adorni,T Adye,AA Affolder,Y Afik,C Agapopoulou,MN Agaras,A Aggarwal,C Agheorghiesei,JA Aguilar-Saavedra,F Ahmadov,WS Ahmed,X Ai,G Aielli,S Akatsuka,TPA Åkesson,E Akilli,AV Akimov,K Al Khoury,GL Alberghi,J Albert,MJ Verzini,S Alderweireldt,M Aleksa,IN Aleksandrov,C Alexa,D Alexandre,T Alexopoulos,A Alfonsi,M Alhroob,B Ali,G Alimonti,J Alison,SP Alkire,C Allaire,BMM Allbrooke,BW Allen,PP Allport,A Aloisio,A Alonso,F Alonso,C Alpigiani,AA Alshehri,M Alvarez Estevez,D Álvarez Piqueras,MG Alviggi,Y Amaral Coutinho,A Ambler,L Ambroz,C Amelung,D Amidei,SP Santos,S Amoroso,CS Amrouche,F An,C Anastopoulos,N Andari,T Andeen,CF Anders,JK Anders,A Andreazza,V Andrei,CR Anelli,S Angelidakis,A Angerami,AV Anisenkov,A Annovi,C Antel,MT Anthony,M Antonelli,DJA Antrim,F Anulli,M Aoki,J Aparisi Pozo,L Aperio Bella,G Arabidze,JP Araque,V Araujo Ferraz,R Araujo Pereira,C Arcangeletti,ATH Arce,FA Arduh,JF Arguin,S Argyropoulos,J-H Arling,AJ Armbruster,A Armstrong,O Arnaez,H Arnold,A Artamonov,G Artoni,S Artz,S Asai,N Asbah,EM Asimakopoulou,L Asquith,K Assamagan,R Astalos,RJ Atkin,M Atkinson,NB Atlay,H Atmani,K Augsten,G Avolio,R Avramidou,MK Ayoub,AM Azoulay,G Azuelos,MJ Baca,H Bachacou,K Bachas,M Backes,F Backman,P Bagnaia,M Bahmani,H Bahrasemani,AJ Bailey,VR Bailey,JT Baines,M Bajic,C Bakalis,OK Baker,PJ Bakker,D Bakshi Gupta,S Balaji,EM Baldin,P Balek,F Balli,WK Balunas,J Balz

Journal

The European Physical Journal C

Published Date

2020/2

A search for the electroweak production of charginos and sleptons decaying into final states with two electrons or muons is presented. The analysis is based on 139 fb of proton–proton collisions recorded by the ATLAS detector at the Large Hadron Collider at. Three R-parity-conserving scenarios where the lightest neutralino is the lightest supersymmetric particle are considered: the production of chargino pairs with decays via either W bosons or sleptons, and the direct production of slepton pairs. The analysis is optimised for the first of these scenarios, but the results are also interpreted in the others. No significant deviations from the Standard Model expectations are observed and limits at 95% confidence level are set on the masses of relevant supersymmetric particles in each of the scenarios. For a massless lightest neutralino, masses up to 420 are excluded for the production of the lightest-chargino …

Measurement of Higgs boson decay into b-quarks in associated production with a top-quark pair in pp collisions at = 13 TeV with the ATLAS detector

Authors

Georges Aad,Brad Abbott,Dale C Abbott,Adam Abed Abud,Kira Abeling,Deshan Kavishka Abhayasinghe,Syed Haider Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,AC Abusleme Hoffman,Bobby Samir Acharya,Baida Achkar,Lennart Adam,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,SV Addepalli,Jahred Adelman,Aytul Adiguzel,S Adorni,Tim Adye,AA Affolder,Yoav Afik,Christina Agapopoulou,Merve Nazlim Agaras,Jinky Agarwala,Anamika Aggarwal,Catalin Agheorghiesei,JA Aguilar-Saavedra,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Xiaocong Ai,Giulio Aielli,Iakov Aizenberg,Shunichi Akatsuka,Melike Akbiyik,TPA Åkesson,AV Akimov,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,Pietro Albicocco,MJ Alconada Verzini,Sara Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Alice Alfonsi,Fabrizio Alfonsi,Muhammad Alhroob,Babar Ali,Shahzad Ali,Malik Aliev,Gianluca Alimonti,Corentin Allaire,BMM Allbrooke,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,E Alunno Camelia,M Alvarez Estevez,MG Alviggi,Y Amaral Coutinho,Alessandro Ambler,Luca Ambroz,Christoph Amelung,Dante Amidei,SP Amor Dos Santos,Simone Amoroso,Kieran Robert Amos,Cherifa Sabrina Amrouche,Viktor Ananiev,Christos Anastopoulos,Nansi Andari,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,DJA Antrim,Fabio Anulli,Masato Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,N Aranzabal,V Araujo Ferraz,Chiara Arcangeletti,ATH Arce,Eloisa Arena,Jean-Francois Arguin,Spyros Argyropoulos,J-H Arling,Aaron James Armbruster,Alexander Armstrong,Olivier Arnaez,Hannah Arnold,ZP Arrubarrena Tame,Giacomo Artoni,Haruka Asada,Kanae Asai,Shoji Asai,Nedaa Alexandra Asbah,Eleni Myrto Asimakopoulou,Lily Asquith,Jihad Assahsah,K Assamagan,Robert Astalos,Ryan Justin Atkin,M Atkinson,Naim Bora Atlay,Hicham Atmani,PA Atmasiddha,Kamil Augsten,Silvia Auricchio,Volker Andreas Austrup,Gal Avner,Giuseppe Avolio,Mohamad Kassem Ayoub,Georges Azuelos,Dominik Babal,Henri Bachacou,Konstantinos Bachas,Alexander Bachiu,F Backman,Anthony Badea,Paolo Bagnaia,H Bahrasemani,AJ Bailey,VR Bailey,JT Baines,Christos Bakalis,OK Baker,Pepijn Johannes Bakker,Evelin Bakos,D Bakshi Gupta,Shyam Balaji,Rahul Balasubramanian

Journal

Journal of High Energy Physics

Published Date

2022/6

The associated production of a Higgs boson and a top-quark pair is measured in events characterised by the presence of one or two electrons or muons. The Higgs boson decay into a b-quark pair is used. The analysed data, corresponding to an integrated luminosity of 139 fb− 1, were collected in proton-proton collisions at the Large Hadron Collider between 2015 and 2018 at a centre-of-mass energy of= 13 TeV. The measured signal strength, defined as the ratio of the measured signal yield to that predicted by the Standard Model, is. This result is compatible with the Standard Model prediction and corresponds to an observed (expected) significance of 1.0 (2.7) standard deviations. The signal strength is also measured differentially in bins of the Higgs boson transverse momentum in the simplified template cross-section framework, including a bin for specially selected boosted Higgs bosons with …

Search for strongly interacting massive particles generating trackless jets in proton–proton collisions at

Authors

Armen Tumasyan,Wolfgang Adam,Thomas Bergauer,Marko Dragicevic,Janos Erö,A Escalante Del Valle,Rudolf Fruehwirth,Manfred Jeitler,Natascha Krammer,Lukas Lechner,Dietrich Liko,Ivan Mikulec,Florian Michael Pitters,Navid Rad,Jochen Schieck,Robert Schöfbeck,Markus Spanring,Sebastian Templ,Wolfgang Waltenberger,C-E Wulz,Mateusz Zarucki,Vladimir Chekhovsky,Aliaksandr Litomin,Vladimir Makarenko,J Suarez Gonzalez,Mohamed Rashad Darwish,Eddi A De Wolf,D Di Croce,X Janssen,T Kello,A Lelek,M Pieters,H Rejeb Sfar,H Van Haevermaet,P Van Mechelen,S Van Putte,N Van Remortel,F Blekman,ES Bols,SS Chhibra,J D’Hondt,J De Clercq,D Lontkovskyi,S Lowette,I Marchesini,S Moortgat,A Morton,Q Python,S Tavernier,W Van Doninck,Petra Van Mulders,Diego Beghin,Bugra Bilin,Barbara Clerbaux,Gilles De Lentdecker,Brian Dorney,Laurent Favart,Anastasia Grebenyuk,Amandeep Kaur Kalsi,Inna Makarenko,Louis Moureaux,Laurent Pétré,Andrey Popov,Nicolas Postiau,Elizabeth Starling,Laurent Thomas,C Vander Velde,Pascal Vanlaer,David Vannerom,Liam Wezenbeek,Tom Cornelis,Didar Dobur,Marek Gruchala,Illia Khvastunov,Marek Niedziela,Christos Roskas,Kirill Skovpen,Michael Tytgat,Willem Verbeke,Basile Vermassen,Martina Vit,Giacomo Bruno,F Bury,Claudio Caputo,Pieter David,Christophe Delaere,Martin Delcourt,Izzeddin Suat Donertas,Andrea Giammanco,Vincent Lemaitre,Kuntal Mondal,Jessica Prisciandaro,Angela Taliercio,Maksym Teklishyn,Pietro Vischia,Sébastien Wertz,Sophie Wuyckens,GA Alves,Carsten Hensel,Arthur Moraes,WL Aldá Júnior,E Belchior Batista Das Chagas,H Brandao Malbouisson,Wagner Carvalho,Jose Chinellato,Eduardo Coelho,Eliza Melo Da Costa,Gustavo Gil Da Silveira,D De JesusDamiao,S Fonseca De Souza,Jordan Martins,D Matos Figueiredo,M Medina Jaime,C Mora Herrera,Luiz Mundim,Helio Nogima,P Rebello Teles,LJ Sanchez Rosas,Alberto Santoro,SM Silva Do Amaral,Andre Sznajder,Mauricio Thiel,F Torres Da SilvaDeAraujo,A Vilela Pereira,Cesar Augusto Bernardes,Luigi Calligaris,TR Fernandez Perez Tomei,EM Gregores,DS Lemos,Pedro G Mercadante,Sergio F Novaes,Sandra S Padula,Aleksandar Aleksandrov,Georgy Antchev,Ivan Atanasov,Roumyana Hadjiiska,Plamen Iaydjiev,Milena Misheva,Mircho Rodozov,Mariana Shopova,Georgi Sultanov,Anton Dimitrov,Todor Ivanov,Leander Litov,Borislav Pavlov,Peicho Petkov,Anton Petrov,Tongguang Cheng,Wenxing Fang,Qianying Guo

Journal

The European Physical Journal C

Published Date

2022/3

A search for dark matter in the form of strongly interacting massive particles (SIMPs) using the CMS detector at the LHC is presented. The SIMPs would be produced in pairs that manifest themselves as pairs of jets without tracks. The energy fraction of jets carried by charged particles is used as a key discriminator to suppress efficiently the large multijet background, and the remaining background is estimated directly from data. The search is performed using proton–proton collision data corresponding to an integrated luminosity of 16.1, collected with the CMS detector in 2016. No significant excess of events is observed above the expected background. For the simplified dark matter model under consideration, SIMPs with masses up to 100 are excluded and further sensitivity is explored towards higher masses.

Liver macrophage subsets differentially regulate metastasis in pancreatic cancer

Authors

Stacy K Thomas,Gregory L Beatty

Journal

The Journal of Immunology

Published Date

2022/5/1

Metastasis is the main cause of morbidity and mortality in patients with cancer. In pancreatic ductal adenocarcinoma (PDA), the liver is the most common site of metastasis. During PDA progression, the liver microenvironment becomes altered to support metastatic seeding and colonization by disseminated tumor cells (DTC). Macrophages (MΦ), including liver-resident Clec4f+ Kupffer cells (KCs) and bone marrow derived MΦ (BMDMs), are the dominant immunological components of this niche, yet their precise roles in regulating metastasis remain poorly defined. Here, we sought to understand the interaction of DTCs with liver MΦ as they seed and colonize the liver. To model liver metastasis, mice received intraportal (iPo) injection of murine PDA cells with analysis 2 or 14 days later to examine metastatic seeding and outgrowth, respectively. Liver metastatic burden and immune cell populations were quantified by …

Search for Higgs boson decays into a pair of pseudoscalar particles in the final state with the ATLAS detector in collisions at

Authors

Georges Aad,B Abbott,DC Abbott,A Abed Abud,Kira Abeling,Deshan Kavishka Abhayasinghe,SH Abidi,Asmaa Aboulhorma,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,AC Abusleme Hoffman,Bobby Samir Acharya,Baida Achkar,Lennart Adam,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,SV Addepalli,Jahred Adelman,Aytul Adiguzel,S Adorni,Tim Adye,AA Affolder,Y Afik,C Agapopoulou,MN Agaras,J Agarwala,A Aggarwal,C Agheorghiesei,JA Aguilar-Saavedra,A Ahmad,F Ahmadov,WS Ahmed,X Ai,G Aielli,I Aizenberg,S Akatsuka,M Akbiyik,TPA Åkesson,AV Akimov,K Al Khoury,GL Alberghi,J Albert,P Albicocco,MJ Alconada Verzini,S Alderweireldt,M Aleksa,IN Aleksandrov,C Alexa,T Alexopoulos,A Alfonsi,F Alfonsi,M Alhroob,B Ali,S Ali,M Aliev,G Alimonti,C Allaire,BMM Allbrooke,PP Allport,A Aloisio,F Alonso,C Alpigiani,E Alunno Camelia,M Alvarez Estevez,MG Alviggi,Y Amaral Coutinho,A Ambler,L Ambroz,C Amelung,D Amidei,SP Amor Dos Santos,S Amoroso,CS Amrouche,V Ananiev,C Anastopoulos,N Andari,T Andeen,JK Anders,SY Andrean,A Andreazza,S Angelidakis,A Angerami,AV Anisenkov,A Annovi,C Antel,MT Anthony,E Antipov,M Antonelli,DJA Antrim,F Anulli,M Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,N Aranzabal,V Araujo Ferraz,C Arcangeletti,ATH Arce,E Arena,JF Arguin,S Argyropoulos,J-H Arling,AJ Armbruster,A Armstrong,O Arnaez,H Arnold,ZP Arrubarrena Tame,G Artoni,H Asada,K Asai,S Asai,NA Asbah,EM Asimakopoulou,L Asquith,J Assahsah,K Assamagan,R Astalos,RJ Atkin,M Atkinson,NB Atlay,H Atmani,PA Atmasiddha,K Augsten,S Auricchio,VA Austrup,G Avner,G Avolio,MK Ayoub,G Azuelos,D Babal,H Bachacou,K Bachas,A Bachiu,F Backman,A Badea,P Bagnaia,H Bahrasemani,AJ Bailey,VR Bailey,JT Baines,C Bakalis,OK Baker,PJ Bakker,E Bakos,D Bakshi Gupta,S Balaji,R Balasubramanian,EM Baldin

Journal

Physical Review D

Published Date

2022/1/11

This paper presents a search for decays of the Higgs boson with a mass of 125 GeV into a pair of new pseudoscalar particles, H→ a a, where one a-boson decays into a b-quark pair and the other into a muon pair. The search uses 139 fb− 1 of proton-proton collision data at a center-of-mass energy of s= 13 TeV recorded between 2015 and 2018 by the ATLAS experiment at the LHC. A narrow dimuon resonance is searched for in the invariant mass spectrum between 16 GeV and 62 GeV. The largest excess of events above the Standard Model backgrounds is observed at a dimuon invariant mass of 52 GeV and corresponds to a local (global) significance of 3.3 σ (1.7 σ). Upper limits at 95% confidence level are placed on the branching ratio of the Higgs boson to the b b μ μ final state, B (H→ a a→ b b μ μ), and are in the range 0.2–4.0× 10− 4, depending on the signal mass hypothesis.

Measurement of differential cross sections in proton-proton collisions at and effective field theory constraints

Authors

Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Marko Dragicevic,A Escalante Del Valle,Rudolf Fruehwirth,Manfred Jeitler,Natascha Krammer,Lukas Lechner,Dietrich Liko,Ivan Mikulec,Peter Paulitsch,Florian Michael Pitters,Jochen Schieck,Robert Schöfbeck,Markus Spanring,Sebastian Templ,Wolfgang Waltenberger,C-E Wulz,V Makarenko,MR Darwish,EA De Wolf,Tahys Janssen,T Kello,A Lelek,H Rejeb Sfar,P Van Mechelen,S Van Putte,F Blekman,ES Bols,J D’Hondt,J De Clercq,M Delcourt,H El Faham,S Lowette,S Moortgat,A Morton,D Müller,AR Sahasransu,S Tavernier,W Van Doninck,P Van Mulders,D Beghin,B Bilin,B Clerbaux,G De Lentdecker,L Favart,A Grebenyuk,AK Kalsi,K Lee,M Mahdavikhorrami,I Makarenko,L Moureaux,L Pétré,A Popov,N Postiau,E Starling,L Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,D Vannerom,Liam Wezenbeek,Tom Cornelis,Didar Dobur,Joscha Knolle,Luka Lambrecht,Gianny Mestdach,Marek Niedziela,Christos Roskas,Amrutha Samalan,Kirill Skovpen,Michael Tytgat,Willem Verbeke,Basile Vermassen,Martina Vit,A Bethani,G Bruno,F Bury,C Caputo,P David,C Delaere,IS Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,K Mondal,J Prisciandaro,A Taliercio,M Teklishyn,TT Tran,P Vischia,S Wertz,GA Alves,C Hensel,A Moraes,WL Aldá Júnior,M Alves Gallo Pereira,M Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,EM Da Costa,GG Da Silveira,D De Jesus Damiao,S Fonseca De Souza,D Matos Figueiredo,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,P Rebello Teles,A Santoro,SM Silva Do Amaral,A Sznajder,M Thiel,F Torres Da Silva De Araujo,A Vilela Pereira,CA Bernardes,L Calligaris,TR Fernandez Perez Tomei,EM Gregores,DS Lemos,PG Mercadante,SF Novaes,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Rodozov,M Shopova,G Sultanov,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,T Cheng,Q Guo,T Javaid,M Mittal,H Wang,L Yuan,M Ahmad

Journal

Physical Review D

Published Date

2022/3/9

Differential cross section measurements of W±γ production in proton-proton collisions at s= 13 TeV are presented. The data set used in this study was collected with the CMS detector at the CERN LHC in 2016–2018 with an integrated luminosity of 138 fb− 1. Candidate events containing an electron or muon, a photon, and missing transverse momentum are selected. The measurements are compared with standard model predictions computed at next-to-leading and next-to-next-to-leading orders in perturbative quantum chromodynamics. Constraints on the presence of TeV-scale new physics affecting the W W γ vertex are determined within an effective field theory framework, focusing on the O 3 W operator. A simultaneous measurement of the photon transverse momentum and the azimuthal angle of the charged lepton in a special reference frame is performed. This two-dimensional approach provides up to a factor …

The EXO-200 detector, part II: auxiliary systems

Authors

N Ackerman,J Albert,M Auger,DJ Auty,I Badhrees,PS Barbeau,L Bartoszek,E Baussan,V Belov,C Benitez-Medina,T Bhatta,M Breidenbach,T Brunner,GF Cao,WR Cen,C Chambers,B Cleveland,R Conley,S Cook,M Coon,W Craddock,A Craycraft,W Cree,T Daniels,L Darroch,SJ Daugherty,J Daughhetee,CG Davis,J Davis,S Delaquis,A Der Mesrobian-Kabakian,R DeVoe,T Didberidze,J Dilling,A Dobi,AG Dolgolenko,MJ Dolinski,M Dunford,J Echevers,L Espic,W Fairbank,D Fairbank,J Farine,W Feldmeier,S Feyzbakhsh,P Fierlinger,K Fouts,D Franco,D Freytag,D Fudenberg,P Gautam,G Giroux,R Gornea,K Graham,G Gratta,C Hagemann,C Hall,K Hall,G Haller,EV Hansen,C Hargrove,R Herbst,S Herrin,J Hodgson,M Hughes,A Iverson,A Jamil,C Jessiman,MJ Jewell,A Johnson,TN Johnson,S Johnston,A Karelin,LJ Kaufman,R Killick,T Koffas,S Kravitz,R Krücken,A Kuchenkov,KS Kumar,Y Lan,A Larson,DS Leonard,F Leonard,F LePort,GS Li,S Li,Z Li,C Licciardi,YH Lin,D Mackay,R MacLellan,M Marino,J-M Martin,Y Martin,T McElroy,K McFarlane,T Michel,B Mong,DC Moore,K Murray,R Neilson,R Nelson,O Njoya,O Nusair,K O'Sullivan,A Odian,I Ostrovskiy,C Ouellet,A Piepke,A Pocar,CY Prescott,K Pushkin,F Retiere,A Rivas,AL Robinson,E Rollin,PC Rowson,MP Rozo,J Runge,JJ Russell,S Schmidt,A Schubert,D Sinclair,K Skarpaas,S Slutsky,E Smith,AK Soma,V Stekhanov,V Strickland,M Swift,M Tarka,J Todd,T Tolba,D Tosi,TI Totev,R Tsang,K Twelker,B Veenstra,V Veeraraghavan,J-L Vuilleumier,J-M Vuilleumier,M Wagenpfeil,A Waite,J Walton,T Walton,K Wamba,J Watkins,M Weber,LJ Wen

Journal

Journal of Instrumentation

Published Date

2022/2/8

The EXO-200 experiment searched for neutrinoless double-beta decay of 136 Xe with a single-phase liquid xenon detector. It used an active mass of 110 kg of 80.6%-enriched liquid xenon in an ultra-low background time projection chamber with ionization and scintillation detection and readout. This paper describes the design and performance of the various support systems necessary for detector operation, including cryogenics, xenon handling, and controls. Novel features of the system were driven by the need to protect the thin-walled detector chamber containing the liquid xenon, to achieve high chemical purity of the Xe, and to maintain thermal uniformity across the detector.

Search for heavy resonances decaying to Z (nu (nu) over-bar) V (q (q) over-bar') in proton-proton collisions at root s= 13 TeV

Authors

A Tumasyan,W Adam,JW Andrejkovic,T Bergauer,S Chatterjee,M Dragicevic,Yalçın Güler,CMS Collaboration

Journal

Physical Review D

Published Date

2022

A search is presented for heavy bosons decaying to Z (ν ν) V (q q′), where V can be a W or a Z boson. A sample of proton-proton collision data at s= 13 TeV was collected by the CMS experiment during 2016–2018. The data correspond to an integrated luminosity of 137 fb− 1. The event categorization is based on the presence of high-momentum jets in the forward region to identify production through weak vector boson fusion. Additional categorization uses jet substructure techniques and the presence of large missing transverse momentum to identify W and Z bosons decaying to quarks and neutrinos, respectively. The dominant standard model backgrounds are estimated using data taken from control regions. The results are interpreted in terms of radion, W′ boson, and graviton models, under the assumption that these bosons are produced via gluon-gluon fusion, Drell–Yan, or weak vector boson fusion …

Inclusive nonresonant multilepton probes of new phenomena at

Authors

Armen Tumasyan,Wolfgang Adam,Janik Walter Andrejkovic,Thomas Bergauer,Suman Chatterjee,Konstantinos Damanakis,Marko Dragicevic,A Escalante Del Valle,Rudolf Fruehwirth,Manfred Jeitler,Natascha Krammer,Lukas Lechner,Dietrich Liko,Ivan Mikulec,Peter Paulitsch,Florian Michael Pitters,Jochen Schieck,Robert Schöfbeck,Dennis Schwarz,Sebastian Templ,Wolfgang Waltenberger,C-E Wulz,V Makarenko,MR Darwish,EA De Wolf,Tahys Janssen,T Kello,A Lelek,H Rejeb Sfar,P Van Mechelen,S Van Putte,F Blekman,ES Bols,J D’Hondt,M Delcourt,H El Faham,S Lowette,S Moortgat,A Morton,D Müller,AR Sahasransu,S Tavernier,W Van Doninck,D Vannerom,D Beghin,B Bilin,B Clerbaux,G De Lentdecker,L Favart,AK Kalsi,K Lee,M Mahdavikhorrami,I Makarenko,L Moureaux,S Paredes,L Pétré,A Popov,N Postiau,E Starling,L Thomas,M Vanden Bemden,C Vander Velde,P Vanlaer,Tom Cornelis,Didar Dobur,Joscha Knolle,Luka Lambrecht,Gianny Mestdach,Marek Niedziela,Cesar Rendon,Christos Roskas,Amrutha Samalan,Kirill Skovpen,Michael Tytgat,Basile Vermassen,Liam Wezenbeek,A Benecke,A Bethani,G Bruno,F Bury,C Caputo,P David,C Delaere,IS Donertas,A Giammanco,K Jaffel,Sa Jain,V Lemaitre,K Mondal,J Prisciandaro,A Taliercio,M Teklishyn,TT Tran,P Vischia,S Wertz,GA Alves,C Hensel,A Moraes,P Rebello Teles,WL Aldá Júnior,M Alves Gallo Pereira,M Barroso Ferreira Filho,H Brandao Malbouisson,W Carvalho,J Chinellato,EM Da Costa,GG Da Silveira,D De Jesus Damiao,V Dos Santos Sousa,S Fonseca De Souza,C Mora Herrera,K Mota Amarilo,L Mundim,H Nogima,A Santoro,SM Silva Do Amaral,A Sznajder,M Thiel,F Torres Da Silva De Araujo,A Vilela Pereira,CA Bernardes,L Calligaris,TR Fernandez Perez Tomei,EM Gregores,DS Lemos,PG Mercadante,SF Novaes,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Rodozov,M Shopova,G Sultanov,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,T Cheng,T Javaid,M Mittal,L Yuan,M Ahmad,G Bauer,C Dozen,Z Hu

Journal

Physical Review D

Published Date

2022/6/14

An inclusive search for nonresonant signatures of beyond the standard model (SM) phenomena in events with three or more charged leptons, including hadronically decaying τ leptons, is presented. The analysis is based on a data sample corresponding to an integrated luminosity of 138 fb− 1 of proton-proton collisions at s= 13 TeV, collected by the CMS experiment at the LHC in 2016–2018. Events are categorized based on the lepton and b-tagged jet multiplicities and various kinematic variables. Three scenarios of physics beyond the SM are probed, and signal-specific boosted decision trees are used for enhancing sensitivity. No significant deviations from the background expectations are observed. Lower limits are set at 95% confidence level on the mass of type-III seesaw heavy fermions in the range 845–1065 GeV for various decay branching fraction combinations to SM leptons. Doublet and singlet …

Erratum to: Search for new physics in dijet angular distributions using proton-proton collisions at and constraints on dark matter and other models

Authors

AM Sirunyan,A Tumasyan,W Adam,F Ambrogi,E Asilar,T Bergauer,J Brandstetter,E Brondolin,M Dragicevic,J Erö,A Escalante Del Valle,M Flechl,M Friedl,R Frühwirth,VM Ghete,J Grossmann,J Hrubec,M Jeitler,A König,N Krammer,I Krätschmer,D Liko,T Madlener,I Mikulec,E Pree,N Rad,H Rohringer,J Schieck,R Schöfbeck,M Spanring,D Spitzbart,A Taurok,W Waltenberger,J Wittmann,C-E Wulz,M Zarucki,V Chekhovsky,V Mossolov,J Suarez Gonzalez,EA De Wolf,D Di Croce,X Janssen,J Lauwers,M Pieters,M Van De Klundert,H Van Haevermaet,P Van Mechelen,N Van Remortel,S Abu Zeid,F Blekman,J D’Hondt,I De Bruyn,J De Clercq,K Deroover,G Flouris,D Lontkovskyi,S Lowette,I Marchesini,S Moortgat,L Moreels,Q Python,K Skovpen,S Tavernier,W Van Doninck,P Van Mulders,I Van Parijs,D Beghin,B Bilin,H Brun,B Clerbaux,G De Lentdecker,H Delannoy,B Dorney,G Fasanella,L Favart,R Goldouzian,A Grebenyuk,AK Kalsi,T Lenzi,J Luetic,T Seva,E Starling,C Vander Velde,P Vanlaer,D Vannerom,R Yonamine,T Cornelis,D Dobur,A Fagot,M Gul,I Khvastunov,D Poyraz,C Roskas,D Trocino,M Tytgat,W Verbeke,B Vermassen,M Vit,N Zaganidis,H Bakhshiansohi,O Bondu,S Brochet,G Bruno,C Caputo,A Caudron,P David,S De Visscher,C Delaere,M Delcourt,B Francois,A Giammanco,G Krintiras,V Lemaitre,A Magitteri,A Mertens,M Musich,K Piotrzkowski,L Quertenmont,A Saggio,M Vidal Marono,S Wertz,J Zobec,WL Aldá Júnior,FL Alves,GA Alves,L Brito,G Correia Silva,C Hensel,A Moraes,ME Pol,P Rebello Teles,E Belchior Batista Das Chagas,W Carvalho,J Chinellato,E Coelho,EM Da Costa,GG Da Silveira,D De Jesus Damiao,S Fonseca De Souza,H Malbouisson,M Medina Jaime,M Melo De Almeida,C Mora Herrera,L Mundim,H Nogima,LJ Sanchez Rosas,A Santoro,A Sznajder,M Thiel,EJ Tonelli Manganote

Journal

The European Physical Journal C

Published Date

2022/4/29

Sirunyan, AM, Tumasyan, A., Adam, W. et al. Erratum to: Search for new physics in dijet angular distributions using proton-proton collisions at and constraints on dark matter and other models. Eur. Phys. J. C 82, 379 (2022). https://doi. org/10.1140/epjc/s10052-022-10278-0

Nuclear modification of Y states in pPb collisions at sNN= 5.02 TeV

Authors

Armen Tumasyan,Wolfgang Adam,Federico Ambrogi,Thomas Bergauer,Marko Dragicevic,Janos Erö,A Escalante Del Valle,Martin Flechl,Rudolf Fruehwirth,Manfred Jeitler,Natascha Krammer,Ilse Krätschmer,Dietrich Liko,Thomas Madlener,Ivan Mikulec,Navid Rad,Jochen Schieck,Robert Schöfbeck,Markus Spanring,Wolfgang Waltenberger,C-E Wulz,Mateusz Zarucki,Vladimir Drugakov,J Suarez Gonzalez,MR Darwish,EA De Wolf,D Di Croce,T Janssen,T Kello,A Lelek,M Pieters,H Rejeb Sfar,H Van Haevermaet,P Van Mechelen,S Van Putte,F Blekman,ES Bols,SS Chhibra,J D'Hondt,J De Clercq,D Lontkovskyi,S Lowette,I Marchesini,S Moortgat,Q Python,S Tavernier,W Van Doninck,P Van Mulders,D Beghin,B Bilin,B Clerbaux,G De Lentdecker,H Delannoy,B Dorney,L Favart,A Grebenyuk,AK Kalsi,L Moureaux,A Popov,N Postiau,E Starling,L Thomas,C Vander Velde,P Vanlaer,D Vannerom,T Cornelis,D Dobur,I Khvastunov,M Niedziela,C Roskas,K Skovpen,M Tytgat,W Verbeke,B Vermassen,M Vit,G Bruno,C Caputo,P David,C Delaere,M Delcourt,A Giammanco,V Lemaitre,J Prisciandaro,A Saggio,P Vischia,J Zobec,GA Alves,G Correia Silva,C Hensel,A Moraes,E Belchior Batista Das Chagas,W Carvalho,J Chinellato,E Coelho,EM Da Costa,GG Da Silveira,D De Jesus Damiao,C De Oliveira Martins,S Fonseca De Souza,Hb Malbouisson,J Martins,D Matos Figueiredo,M Medina Jaime,M Melo De Almeida,C Mora Herrera,L Mundim,H Nogima,WL Prado Da Silva,P Rebello Teles,LJ Sanchez Rosas,A Santoro,A Sznajder,M Thiel,EJ Tonelli Manganote,F Torres Da Silva De Araujo,A Vilela Pereira,CA Bernardes,L Calligaris,TR Fernandez Perez Tomei,EM Gregores,DS Lemos,PG Mercadante,SF Novaes,Sandra S Padula,A Aleksandrov,G Antchev,R Hadjiiska,P Iaydjiev,M Misheva,M Rodozov,M Shopova,G Sultanov,M Bonchev,A Dimitrov,T Ivanov,L Litov,B Pavlov,P Petkov,A Petrov,W Fang,X Gao,L Yuan,M Ahmad,Z Hu,Y Wang,GM Chen,HS Chen,M Chen,CH Jiang,D Leggat

Journal

Physics Letters B

Published Date

2022/12/10

Production cross sections of Image 1, Image 2, and Image 3 states decaying into Image 4 in proton-lead (p Pb) collisions are reported using data collected by the CMS experiment at s NN= 5.02 TeV. A comparison is made with corresponding cross sections obtained with p p data measured at the same collision energy and scaled by the Pb nucleus mass number. The nuclear modification factor for Image 1 is found to be Image 5. Similar results for the excited states indicate a sequential suppression pattern, such that Image 6. The suppression of all states is much less pronounced in p Pb than in PbPb collisions, and independent of transverse momentum Image 7 and center-of-mass rapidity Image 8 of the individual Image 9 state in the studied range Image 10 and Image 11. Models that incorporate final-state effects of bottomonia in pPb collisions are in better agreement with the data than those which only assume …

Search for resonances decaying to three bosons in the hadronic final state in proton-proton collisions at

Authors

Journal

Physical review letters

Published Date

2022/7/6

A search for resonances decaying into a W boson and a radion, where the radion decays into two W bosons, is presented. The data analyzed correspond to an integrated luminosity of 138 fb− 1 recorded in proton-proton collisions with the CMS detector at s= 13 TeV. One isolated charged lepton is required, together with missing transverse momentum and one or two massive large-radius jets, containing the decay products of either two or one W bosons, respectively. No excess over the background estimation is observed. The results are combined with those from a complementary channel with an all-hadronic final state, described in an accompanying paper. Limits are set on parameters of an extended warped extra-dimensional model. These searches are the first of their kind at the LHC.

Measurement of the energy response of the ATLAS calorimeter to charged pions from W±→ τ±(→ π±ντ) ντ events in Run 2 data

Authors

Atlas Collaboration

Published Date

2022

The energy response of the ATLAS calorimeter is measured for single charged pions with transverse momentum in the range 10< pT< 300 GeV. The measurement is performed using 139 fb− 1 of LHC proton–proton collision data at

Evaluation of MOS and Gated Diode Devices of the ATLAS ITk Test Chip

Authors

Ezekiel Staats,Christian Scharf,Marcela Mikestikova,Miguel Ullan,Yoshinobu Unno,Thomas Koffas,Ioannis Kopsalis,Philip Patrick Allport,Celeste Fleta Corral,Christoph Thomas Klein,Callan Jessiman,Vitaliy Fadeyev,Jiri Kroll

Published Date

2022/9/6

Abstract The new ATLAS Inner Tracker (ITk) sub-detector is necessitated by the impending High Luminosity Large Hadron Collider (HL-LHC) upgrade. This replacement is part of the phase-II upgrade programme for the HL-LHC which will see a sevenfold increase in peak instantaneous luminosity with a total ionizing dose of 53 MRad. The fully solid state ITk will employ silicon n^{+}-in-p microstrip sensors in the outer layers of the tracking detector. The main sensors are manufactured on 6” diameter silicon wafers. Periphery wafer area (halfmoons) to which the main sensor does not extend serves as convenient venues for the implementation of test devices. The primary utility of the test devices is Quality Assurance (QA), that is, the monitoring of the consistency and reliability of the manufacturing process. A Metal-Oxide-Semiconductor (MOS) and Gate-Controlled Diode (GCD) are two such test devices aimed at characterizing the surface oxide and silicon-oxide interface. Measurement procedures and parameters for QA are established for these devices and the viability of these tests for gamma irradiated samples is evaluated. The suitability of these devices to further monitor the strip sensor fabrication process is also investigated.

Measurements of jet observables sensitive to -quark fragmentation in events at the LHC with the ATLAS detector

Authors

Georges Aad,Brad Abbott,Dale C Abbott,A Abed Abud,Kira Abeling,Deshan Kavishka Abhayasinghe,Syed Haider Abidi,OS AbouZeid,Nicola Louise Abraham,Halina Abramowicz,Henso Abreu,Yiming Abulaiti,Bobby Samir Acharya,Baida Achkar,Lennart Adam,C Adam Bourdarios,Leszek Adamczyk,Lukas Adamek,Jahred Adelman,Aytul Adiguzel,S Adorni,Tim Adye,AA Affolder,Yoav Afik,Christina Agapopoulou,Merve Nazlim Agaras,Anamika Aggarwal,Catalin Agheorghiesei,JA Aguilar-Saavedra,Ammara Ahmad,Faig Ahmadov,Waleed Syed Ahmed,Xiaocong Ai,Giulio Aielli,Shunichi Akatsuka,Melike Akbiyik,TPA Åkesson,Ece Akilli,AV Akimov,Konie Al Khoury,Gian Luigi Alberghi,Justin Albert,MJ Alconada Verzini,Sara Alderweireldt,Martin Aleksa,IN Aleksandrov,Calin Alexa,Theodoros Alexopoulos,Alice Alfonsi,Fabrizio Alfonsi,Muhammad Alhroob,Babar Ali,Shahzad Ali,Malik Aliev,Gianluca Alimonti,Corentin Allaire,BMM Allbrooke,Philip Patrick Allport,Alberto Aloisio,Francisco Alonso,Cristiano Alpigiani,E Alunno Camelia,M Alvarez Estevez,MG Alviggi,Y Amaral Coutinho,Alessandro Ambler,Luca Ambroz,Christoph Amelung,Dante Amidei,SP Amor Dos Santos,Simone Amoroso,Cherifa Sabrina Amrouche,Fenfen An,Christos Anastopoulos,Nansi Andari,T Andeen,John Kenneth Anders,Stefio Yosse Andrean,Attilio Andreazza,Victor Andrei,Christopher Ryan Anelli,Stylianos Angelidakis,Aaron Angerami,AV Anisenkov,Alberto Annovi,Claire Antel,Matthew Thomas Anthony,Egor Antipov,Mario Antonelli,DJA Antrim,Fabio Anulli,Masato Aoki,JA Aparisi Pozo,MA Aparo,L Aperio Bella,N Aranzabal,V Araujo Ferraz,R Araujo Pereira,Chiara Arcangeletti,ATH Arce,JF Arguin,S Argyropoulos,J-H Arling,AJ Armbruster,A Armstrong,O Arnaez,H Arnold,ZP Arrubarrena Tame,G Artoni,H Asada,K Asai,S Asai,T Asawatavonvanich,NA Asbah,EM Asimakopoulou,L Asquith,J Assahsah,K Assamagan,R Astalos,RJ Atkin,M Atkinson,NB Atlay,H Atmani,PA Atmasiddha,K Augsten,VA Austrup,G Avolio,MK Ayoub,G Azuelos,D Babal,H Bachacou,K Bachas,F Backman,P Bagnaia,H Bahrasemani,AJ Bailey,VR Bailey,JT Baines,C Bakalis,OK Baker,PJ Bakker,E Bakos,D Bakshi Gupta,S Balaji,R Balasubramanian,EM Baldin,P Balek,F Balli,WK Balunas,J Balz

Journal

Physical Review D

Published Date

2022/8/9

Several observables sensitive to the fragmentation of b quarks into b hadrons are measured using 36 fb− 1 of s= 13 TeV proton-proton collision data collected with the ATLAS detector at the LHC. Jets containing b hadrons are obtained from a sample of dileptonic t t events, and the associated set of charged-particle tracks is separated into those from the primary p p interaction vertex and those from the displaced b-decay secondary vertex. This division is used to construct observables that characterize the longitudinal and transverse momentum distributions of the b hadron within the jet. The measurements have been corrected for detector effects and provide a test of heavy-quark-fragmentation modeling at the LHC in a system where the top-quark decay products are color connected to the proton beam remnants. The unfolded distributions are compared with the predictions of several modern Monte Carlo parton …

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GWTC-2.1: Deep extended catalog of compact binary coalescences observed by LIGO and Virgo during the first half of the third observing run

GWTC-3: compact binary coalescences observed by LIGO and Virgo during the second part of the third observing run

Specifications and pre-production of n+-in-p large-format strip sensors fabricated in 6-inch silicon wafers, ATLAS18, for the Inner Tracker of the ATLAS Detector for High …

Analysis of humidity sensitivity of silicon strip sensors for ATLAS upgrade tracker, pre-and post-irradiation

Search for MeV electron recoils from dark matter in EXO-200

Search for electroweak production of charginos and neutralinos in proton-proton collisions at = 13 TeV

Measurement of Higgs boson decay into b-quarks in associated production with a top-quark pair in pp collisions at = 13 TeV with the ATLAS detector

Search for strongly interacting massive particles generating trackless jets in proton–proton collisions at

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are the top articles of Thomas Koffas at Carleton University.

What are Thomas Koffas's research interests?

The research interests of Thomas Koffas are: Physics, Experimental High Energy Physics, Neutrinos, Higgs, Detector Development

What is Thomas Koffas's total number of citations?

Thomas Koffas has 315,144 citations in total.

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