Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/48799
Registo completo
Campo DC | Valor | Idioma |
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dc.contributor.author | Onofre, A. | por |
dc.contributor.author | Castro, Nuno Filipe Silva Fernandes | por |
dc.contributor.author | ATLAS Collaboration | por |
dc.date.accessioned | 2017-12-30T05:32:42Z | - |
dc.date.available | 2017-12-30T05:32:42Z | - |
dc.date.issued | 2012 | - |
dc.identifier.citation | Aad, G., Abbott, B., Abdallah, J., Khalek, S. A., Abdelalim, A. A., Abdinov, O., . . . Collaboration, A. (2012). Evidence for the associated production of a W boson and a top quark in ATLAS at root s=7 TeV. Physics Letters B, 716(1), 142-159. doi: 10.1016/j.physletb.2012.08.011 | por |
dc.identifier.issn | 0370-2693 | - |
dc.identifier.uri | https://hdl.handle.net/1822/48799 | - |
dc.description.abstract | This Letter presents evidence for the associated production of a W boson and a top quark using 2.05 fb−12.05 fb−1 of pp collision data at View the MathML sources=7TeV accumulated with the ATLAS detector at the LHC. The analysis is based on the selection of the dileptonic final states with events featuring two isolated leptons, electron or muon, with significant transverse missing momentum and at least one jet. An approach based on boosted decision trees has been developed to improve the discrimination of single top-quark Wt events from background. A template fit to the final classifier distributions is performed to determine the cross-section. The result is incompatible with the background-only hypothesis at the 3.3σ level, the expected sensitivity assuming the Standard Model production rate being 3.4σ . The corresponding cross-section is determined and found to be σWt=16.8±2.9 (stat)±4.9 (syst) pbσWt=16.8±2.9 (stat)±4.9 (syst) pb, in good agreement with the Standard Model expectation. From this result the CKM matrix element View the MathML source|Vtb|=1.03−0.19+0.16 is derived assuming that the Wt production through |Vts||Vts| and |Vtd||Vtd| is small. | por |
dc.description.sponsorship | We acknowledge the support of ANPCyT, Argentina; YerPhl, 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 of America. | por |
dc.language.iso | eng | por |
dc.publisher | Elsevier 1 | por |
dc.relation | info:eu-repo/grantAgreement/EC/FP7/246806/EU | por |
dc.rights | openAccess | por |
dc.subject | ATLAS | por |
dc.subject | Top quark | por |
dc.subject | W+tW+t | por |
dc.subject | Single top-quark | por |
dc.subject | W plus t | por |
dc.title | Evidence for the associated production of a W boson and a top quark in ATLAS at root s=7 TeV | por |
dc.type | article | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | http://www.sciencedirect.com/science/article/pii/S0370269312008489 | por |
oaire.citationStartPage | 142 | por |
oaire.citationEndPage | 156 | por |
oaire.citationIssue | 1 | por |
oaire.citationTitle | Physics Letters B | por |
oaire.citationVolume | 716 | por |
dc.identifier.eissn | 1873-2445 | - |
dc.identifier.doi | 10.1016/j.physletb.2012.08.011 | por |
dc.subject.fos | Ciências Naturais::Ciências Físicas | - |
dc.subject.fos | Ciências Naturais::Ciências Físicas | por |
dc.description.publicationversion | info:eu-repo/semantics/publishedVersion | por |
dc.subject.wos | Science & Technology | por |
sdum.journal | Physics Letters B | por |
Aparece nas coleções: | LIP - Artigos/papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1-s2.0-S0370269312008489-main.pdf | 1,08 MB | Adobe PDF | Ver/Abrir |