Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer
dc.contributor.author | Sirunyan, A. M. | pt_BR |
dc.contributor.author | Silveira, Gustavo Gil da | pt_BR |
dc.contributor.author | CMS Collaboration | pt_BR |
dc.contributor.author | TOTEM Collaboration | pt_BR |
dc.date.accessioned | 2018-09-22T03:01:37Z | pt_BR |
dc.date.issued | 2018 | pt_BR |
dc.identifier.issn | 1029-8479 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/182432 | pt_BR |
dc.description.abstract | The 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 fb1 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.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The journal of high energy physics. Trieste. No. 7 (July 2018), 153, 44 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Aceleradores de partículas | pt_BR |
dc.subject | Forward physics | en |
dc.subject | Hadron-Hadron scattering (experiments) | en |
dc.subject | Colisões proton-proton | pt_BR |
dc.subject | Leptons | pt_BR |
dc.subject | Photon production | en |
dc.subject | Proton-proton scattering | en |
dc.title | Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13TeV with the CMS-TOTEM precision proton spectrometer | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001075258 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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