Search for FCNC single top-quark production at √s=7 TeV with the ATLAS detector

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dc.contributor.author Aad, G.
dc.contributor.author ATLAS Collaboration
dc.contributor.author Barreiro, Fernando
dc.contributor.author Cantero, J.
dc.contributor.author De la Torre, H.
dc.contributor.author Del Peso, J.
dc.contributor.author Labarga, Luis
dc.contributor.author Glasman, C.
dc.contributor.author Llorente Merino, J.
dc.contributor.author Lagouri, T.
dc.contributor.author March, Luis
dc.contributor.author Nebot, Eduardo
dc.contributor.author Terrón, J.
dc.contributor.other UAM. Departamento de Física Teórica es_ES
dc.date.accessioned 2015-12-04T13:48:58Z
dc.date.available 2015-12-04T13:48:58Z
dc.date.issued 2012-06-12
dc.identifier.citation Physics Letters B 712.4-5 (2012): 351-369 en_US
dc.identifier.issn 0370-2693 (print) es_ES
dc.identifier.issn 1873-2445 (online) es_ES
dc.identifier.uri http://hdl.handle.net/10486/669072
dc.description Artículo escrito por un elevado número de autores, solo se referencian el que aparece en primer lugar, el nombre del grupo de colaboración, si le hubiere, y los autores pertenecientes a la UAM en_US
dc.description.abstract A search for the production of single top-quarks via flavour-changing neutral-currents is presented. Data collected with the ATLAS detector at a centre-of-mass energy of √s = 7 TeV, corresponding to an integrated luminosity of 2.05 fb−1, are used. Candidate events with a semileptonic top-quark decay signature are classified as signal- or background-like events by using several kinematic variables as input to a neural network. No signal is observed in the neural network output distribution and a Bayesian upper limit is placed on the production cross-section. The observed upper limit at 95% confidence level on the cross-section multiplied by the t → W b branching fraction is measured to be σqg→t × B(t → W b) < 3.9 pb. This upper limit is converted using a model-independent approach into upper limits on the coupling strengths κugt/Λ < 6.9 · 10−3 TeV−1 and κcgt/Λ < 1.6 · 10−2 TeV−1, where Λ is the new physics scale, and on the branching fractions B(t → ug) < 5.7 · 10−5 and B(t → cg) < 2.7 · 10−4 en_US
dc.description.sponsorship We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS, MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF, DNSRC and Lundbeck Foundation, Denmark; EPLANET and ERC, European Union; IN2P3-CNRS, CEA-DSM/IRFU, France; GNAS, Georgia; BMBF, DFG, HGF, MPG and AvH Foundation, Germany; GSRT, Greece; ISF, MINERVA, GIF, DIP and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; FOM and NWO, Netherlands; RCN, Norway; MNiSW, Poland; GRICES and FCT, Portugal; MERYS (MECTS), Romania; MES of Russia and ROSATOM, Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; ARRS and MVZT, Slovenia; DST/NRF, South Africa; MICINN, Spain; SRC and Wallenberg Foundation, Sweden; SER, SNSF and Cantons of Bern and Geneva, Switzerland; NSC, Taiwan; TAEK, Turkey; STFC, the Royal Society and Leverhulme Trust, United Kingdom; DOE and NSF, United States en_US
dc.format.extent 19 pág. es_ES
dc.format.mimetype application/pdf en
dc.language.iso eng en
dc.publisher CERN en_US
dc.publisher Elsevier en_US
dc.relation.ispartof Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics en_US
dc.rights © 2012 CERN en_US
dc.subject.other FCNC en_US
dc.subject.other Heavy-quark production en_US
dc.subject.other Single top quark en_US
dc.subject.other Top physics en_US
dc.title Search for FCNC single top-quark production at √s=7 TeV with the ATLAS detector en_US
dc.type article en
dc.subject.eciencia Física es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.physletb.2012.05.022 es_ES
dc.identifier.doi 10.1016/j.physletb.2012.05.022 es_ES
dc.identifier.publicationfirstpage 351 es_ES
dc.identifier.publicationissue 4-5 es_ES
dc.identifier.publicationlastpage 369 es_ES
dc.identifier.publicationvolume 712 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/246806 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion en
dc.rights.cc Reconocimiento es_ES
dc.rights.accessRights openAccess en
dc.authorUAM Lagouri , Theodota (263922)
dc.authorUAM Labarga Echeverría, Luis Alfonso (259926)
dc.authorUAM March Ruiz, Luis (264217)
dc.authorUAM Nebot Del Busto, Eduardo (264001)
dc.authorUAM Barreiro Alonso, Fernando (259561)


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