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dc.contributor.authorSirunyan, A. M.pt_BR
dc.contributor.authorSilveira, Gustavo Gil dapt_BR
dc.contributor.authorCMS Collaborationpt_BR
dc.contributor.authorTOTEM Collaborationpt_BR
dc.date.accessioned2018-09-22T03:01:37Zpt_BR
dc.date.issued2018pt_BR
dc.identifier.issn1029-8479pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/182432pt_BR
dc.description.abstractThe process pp ! p`+`􀀀p( ), with `+`􀀀 a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the rst time at the LHC in pp collisions at ps = 13TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the rst time in 2016. The second proton either remains intact or is excited and then dissociates into a low-mass state p , which is undetected. The measurement is based on an integrated luminosity of 9.4 fb􀀀1 collected during standard, high-luminosity LHC operation. A total of 12 + 􀀀 and 8 e+e􀀀 pairs with m(`+`􀀀) > 110 GeV, and matching forward proton kinematics, are observed, with expected backgrounds of 1:49 0:07 (stat) 0:53 (syst) and 2:36 0:09 (stat) 0:47 (syst), respectively. This corresponds to an excess of more than ve standard deviations over the expected background. The present result constitutes the rst observation of proton-tagged collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specications.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofThe journal of high energy physics. Trieste. No. 7 (July 2018), 153, 44 p.pt_BR
dc.rightsOpen Accessen
dc.subjectAceleradores de partículaspt_BR
dc.subjectForward physicsen
dc.subjectHadron-Hadron scattering (experiments)en
dc.subjectColisões proton-protonpt_BR
dc.subjectLeptonspt_BR
dc.subjectPhoton productionen
dc.subjectProton-proton scatteringen
dc.titleObservation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometerpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001075258pt_BR
dc.type.originEstrangeiropt_BR


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