Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer

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dc.contributor.authorGeorgiev, Vjačeslav
dc.contributor.authorHammerbauer, Jiří
dc.contributor.authorLinhart, Richard
dc.contributor.authorPeroutka, Zdeněk
dc.contributor.authorŠiroký, Jan
dc.contributor.authorZich, Jan
dc.date.accessioned2019-05-13T10:00:10Z
dc.date.available2019-05-13T10:00:10Z
dc.date.issued2018
dc.description.abstract-translatedThe process pp -> pl(+) l(-) p(()*()), with l(+) l(-) a muon or an electron pair produced at midrapidity with mass larger than 110 GeV, has been observed for the first time at the LHC in pp collisions at root s = 13 TeV. One of the two scattered protons is measured in the CMS-TOTEM precision proton spectrometer (CT-PPS), which operated for the first 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 mu(+)/mu(-) and 8 e(+)e(-) pairs with m(l(+)l(-)) > 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 five standard deviations over the expected background. The present result constitutes the first observation of proton-tagged gamma gamma collisions at the electroweak scale. This measurement also demonstrates that CT-PPS performs according to the design specifications.en
dc.format45 s.cs
dc.format.mimetypeapplication/pdf
dc.identifier.citationGEORGIEV, V., HAMMERBAUER, J., LINHART, R., PEROUTKA, Z., ŠIROKÝ, J., ZICH, J. Observation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometer. Journal of High Energy Physics, 2018, č. 7, s. 0-44. ISSN 1029-8479.en
dc.identifier.document-number440090400002
dc.identifier.doi10.1007/JHEP07(2018)153
dc.identifier.issn1029-8479
dc.identifier.obd43926013
dc.identifier.uri2-s2.0-85051832717
dc.identifier.urihttp://hdl.handle.net/11025/34652
dc.language.isoenen
dc.publisherIOP Publishingen
dc.rightsPlný text je přístupný v rámci univerzity přihlášeným uživatelům.cs
dc.rights© IOP Publishingen
dc.rights.accessrestrictedAccessen
dc.subject.translatedforward physicsen
dc.subject.translatedHadron-Hadron scattering (experiments)en
dc.subject.translatedphoton productionen
dc.subject.translatedproton-proton scatteringen
dc.titleObservation of proton-tagged, central (semi)exclusive production of high-mass lepton pairs in pp collisions at 13 TeV with the CMS-TOTEM precision proton spectrometeren
dc.typečlánekcs
dc.typearticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen

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