Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/17331
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dc.contributor.authorSirunyan, AM-
dc.contributor.authorTumasyan, A-
dc.contributor.authorAdam, W-
dc.contributor.authorAmbrogi, F-
dc.contributor.authorAsilar, E-
dc.contributor.authorBergauer, T-
dc.contributor.authorBrandstetter, J-
dc.contributor.authorDragicevic, M-
dc.contributor.authorErö, J-
dc.contributor.authorEscalante Del Valle, A-
dc.contributor.authorFlechl, M-
dc.contributor.authorFrühwirth, R-
dc.contributor.authorGhete, VM-
dc.contributor.authorHrubec, J-
dc.contributor.authorJeitler, M-
dc.contributor.authorKrammer, N-
dc.contributor.authorKrätschmer, I-
dc.contributor.authorLiko, D-
dc.contributor.authorMadlener, T-
dc.contributor.authorMikulec, I-
dc.contributor.authorRad, N-
dc.contributor.authorRohringer, H-
dc.contributor.authorSchieck, J-
dc.contributor.authorSchöfbeck, R-
dc.contributor.authorSpanring, M-
dc.contributor.authorSpitzbart, D-
dc.contributor.authorTaurok, A-
dc.contributor.authorWaltenberger, W-
dc.contributor.authorWittmann, J-
dc.contributor.authorWulz, CE-
dc.contributor.authorZarucki, M-
dc.contributor.authorChekhovsky, V-
dc.contributor.authorMossolov, V-
dc.contributor.authorSuarez Gonzalez, J-
dc.contributor.authorDe Wolf, EA-
dc.contributor.authorDi Croce, D-
dc.contributor.authorJanssen, X-
dc.contributor.authorLauwers, J-
dc.contributor.authorPieters, M-
dc.contributor.authorVan Haevermaet, H-
dc.contributor.authorVan Mechelen, P-
dc.contributor.authorVan Remortel, N-
dc.contributor.authorAbu Zeid, S-
dc.contributor.authorBlekman, F-
dc.contributor.authorD'Hondt, J-
dc.contributor.authorDe Bruyn, I-
dc.contributor.authorDe Clercq, J-
dc.contributor.authorDeroover, K-
dc.contributor.authorFlouris, G-
dc.contributor.authorLontkovskyi, D-
dc.contributor.authorLowette, S-
dc.contributor.authorMarchesini, I-
dc.contributor.authorMoortgat, S-
dc.contributor.authorMoreels, L-
dc.contributor.authorPython, Q-
dc.contributor.authorSkovpen, K-
dc.contributor.authorTavernier, S-
dc.contributor.authorVan Doninck, W-
dc.contributor.authorVan Mulders, P-
dc.contributor.authorVan Parijs, I-
dc.contributor.authorBeghin, D-
dc.contributor.authorBilin, B-
dc.contributor.authorBrun, H-
dc.contributor.authorClerbaux, B-
dc.contributor.authorDe Lentdecker, G-
dc.contributor.authorDelannoy, H-
dc.contributor.authorDorney, B-
dc.contributor.authorFasanella, G-
dc.contributor.authorFavart, L-
dc.contributor.authorGoldouzian, R-
dc.contributor.authorGrebenyuk, A-
dc.contributor.authorKalsi, AK-
dc.contributor.authorLenzi, T-
dc.contributor.authorLuetic, J-
dc.contributor.authorPostiau, N-
dc.contributor.authorStarling, E-
dc.contributor.authorThomas, L-
dc.contributor.authorVander Velde, C-
dc.contributor.authorVanlaer, P-
dc.contributor.authorVannerom, D-
dc.contributor.authorWang, Q-
dc.contributor.authorCornelis, T-
dc.contributor.authorDobur, D-
dc.contributor.authorFagot, A-
dc.contributor.authorGul, M-
dc.contributor.authorKhvastunov, I-
dc.contributor.authorPoyraz, D-
dc.contributor.authorRoskas, C-
dc.contributor.authorTrocino, D-
dc.contributor.authorTytgat, M-
dc.contributor.authorVerbeke, W-
dc.contributor.authorVermassen, B-
dc.contributor.authorVit, M-
dc.contributor.authorZaganidis, N-
dc.contributor.authorBakhshiansohi, H-
dc.date.accessioned2019-01-11T15:39:21Z-
dc.date.available2018-11-29-
dc.date.available2019-01-11T15:39:21Z-
dc.date.issued2018-
dc.identifier.citationPhysical Review Letters, 2018, 121 (22)en_US
dc.identifier.issn0031-9007-
dc.identifier.issnhttp://dx.doi.org/10.1103/PhysRevLett.121.221802-
dc.identifier.urihttp://bura.brunel.ac.uk/handle/2438/17331-
dc.description.abstractThe first evidence of events consistent with the production of a single top quark in association with a photon is reported. The analysis is based on proton-proton collisions at √s=13  TeV and recorded by the CMS experiment in 2016, corresponding to an integrated luminosity of 35.9  fb−1. Events are selected by requiring the presence of a muon (μ), a photon (γ), an imbalance in transverse momentum from an undetected neutrino (ν), and at least two jets (j) of which exactly one is identified as associated with the hadronization of a b quark. A multivariate discriminant based on topological and kinematic event properties is employed to separate signal from background processes. An excess above the background-only hypothesis is observed, with a significance of 4.4 standard deviations. A fiducial cross section is measured for isolated photons with transverse momentum greater than 25 GeV in the central region of the detector. The measured product of the cross section and branching fraction is σ(pp→tγj)B(t→μνb)=115±17(stat)±30(syst)  fb, which is consistent with the standard model prediction.en_US
dc.description.sponsorshipBMWFWand FWF (Austria); FNRS and FWO (Belgium); CNPq, CAPES, FAPERJ, and FAPESP (Brazil); MES (Bulgaria); CERN; CAS, MoST, and NSFC (China); COLCIENCIAS (Colombia); MSES and CSF (Croatia); RPF (Cyprus); SENESCYT (Ecuador); MoER, ERCIUT,and ERDF(Estonia);Academyof Finland,MEC, andHIP(Finland);CEAandCNRS/IN2P3(France);BMBF, DFG, and HGF (Germany); GSRT (Greece); OTKA and NIH (Hungary); DAE and DST (India); IPM (Iran); SFI (Ireland);INFN(Italy);MSIPandNRF(RepublicofKorea); LAS (Lithuania); MOE and UM (Malaysia); BUAP, CINVESTAV, CONACYT, LNS, SEP, and UASLP-FAI (Mexico); MBIE (New Zealand); PAEC (Pakistan); MSHE and NSC (Poland); FCT (Portugal); JINR (Dubna); MON, RosAtom, RAS, RFBR and RAEP (Russia); MESTD (Serbia); SEIDI, CPAN, PCTI and FEDER (Spain); Swiss Funding Agencies (Switzerland); MST (Taipei); ThEPCenter, IPST, STAR, and NSTDA (Thailand); TUBITAK and TAEK (Turkey); NASU and SFFR (Ukraine); STFC (United Kingdom); DOE and NSF (USA). Individuals have received support from INSF (Iran).en_US
dc.language.isoenen_US
dc.publisherAmerican Physical Societyen_US
dc.titleEvidence for the Associated Production of a Single Top Quark and a Photon in Proton-Proton Collisions at s =13 TeVen_US
dc.typeArticleen_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.121.221802-
dc.relation.isPartOfPhysical Review Letters-
pubs.issue22-
pubs.publication-statusPublished-
pubs.volume121-
Appears in Collections:Dept of Electronic and Electrical Engineering Research Papers

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