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Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment

dc.contributor.authorAtlas Collaboration
dc.contributor.authorAad, G.
dc.contributor.authorRodríguez Chala, Mikael 
dc.contributor.authorAguilar Saavedra, Juan Antonio 
dc.date.accessioned2023-09-05T07:47:23Z
dc.date.available2023-09-05T07:47:23Z
dc.date.issued2023-08
dc.identifier.citationThe ATLAS Collaboration. Measurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experiment. Physics Letters B 843 (2023) 137848. [https://doi.org/10.1016/j.physletb.2023.137848]es_ES
dc.identifier.urihttps://hdl.handle.net/10481/84239
dc.descriptionWe thank CERN for the very successful operation of the LHC, as well as the support staff from our institutions without whom ATLAS could not be operated efficiently. We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; ANID, Chile; CAS, MOST and NSFC, China; Minciencias, Colombia; MEYS CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS and CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF and MPG, Germany; GSRI, Greece; RGC and Hong Kong SAR, China; ISF and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MEiN, Poland; FCT, Portugal; MNE/IFA, Romania; MESTD, Serbia; MSSR, Slovakia; ARRS and MIZŠ, Slovenia; DSI/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TENMAK, Türkiye; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, CANARIE, Compute Canada and CRC, Canada; PRIMUS 21/SCI/017 and UNCE SCI/013, Czech Republic; COST,ERC, ERDF, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union; Investissements d'Avenir Labex, Investissements d'Avenir Idex and ANR, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF, Greece; BSF-NSF and MINERVA, Israel; Norwegian Financial Mechanism 2014–2021, Norway; NCN and NAWA, Poland; La Caixa Banking Foundation, CERCA Programme Generalitat de Catalunya and PROMETEO and GenT Programmes Generalitat Valenciana, Spain; Göran Gustafssons Stiftelse, Sweden; The Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers.es_ES
dc.description.abstractA measurement of the charge asymmetry in top-quark pair (tt¯) production in association with a photon is presented. The measurement is performed in the single-lepton tt¯ decay channel using proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider at CERN at a centre-of-mass-energy of 13 TeV during the years 2015–2018, corresponding to an integrated luminosity of 139 fb−1. The charge asymmetry is obtained from the distribution of the difference of the absolute rapidities of the top quark and antiquark using a profile likelihood unfolding approach. It is measured to be AC=−0.003±0.029 in agreement with the Standard Model expectation.es_ES
dc.description.sponsorshipCERNes_ES
dc.description.sponsorshipMICINN, Spaines_ES
dc.description.sponsorshipCOSTes_ES
dc.description.sponsorshipERCes_ES
dc.description.sponsorshipERDFes_ES
dc.description.sponsorshipHorizon 2020, Marie Skłodowska-Curie Actionses_ES
dc.description.sponsorshipEuropean Uniones_ES
dc.description.sponsorshipEU-ESFes_ES
dc.description.sponsorshipLa Caixa Banking Foundation, CERCA Programme Generalitat de Catalunyaes_ES
dc.description.sponsorshipPROMETEOes_ES
dc.description.sponsorshipGenT Programmes Generalitat Valenciana, Spaines_ES
dc.description.sponsorshipPIC, Spaines_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.rightsAtribución 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.titleMeasurement of the charge asymmetry in top-quark pair production in association with a photon with the ATLAS experimentes_ES
dc.typejournal articlees_ES
dc.rights.accessRightsopen accesses_ES
dc.identifier.doi10.1016/j.physletb.2023.137848
dc.type.hasVersionVoRes_ES


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