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Investigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV

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dc.contributor.authorSirunyan, A. M.
dc.contributor.authorTumasyan, A.
dc.contributor.authorAdam, W.
dc.contributor.authorAmbrogi, F.
dc.contributor.authorMatveev, V.
dc.contributor.authorChadeeva, M.
dc.contributor.authorParygin, P.
dc.contributor.authorPhilippov, D.
dc.contributor.authorPopova, E.
dc.contributor.authorRusinov, V.
dc.contributor.authorМатвеев, Виктор Анатольевич
dc.contributor.authorЧадеева, Марина Валентиновна
dc.contributor.authorРусинов, Владимир Юрьевич
dc.date.accessioned2024-11-27T10:01:20Z
dc.date.available2024-11-27T10:01:20Z
dc.date.issued2020
dc.description.abstract© 2020, The Author(s).The ratios of the production cross sections between the excited ϒ(2S) and ϒ(3S) mesons and the ϒ(1S) ground state, detected via their decay into two muons, are studied as a function of the number of charged particles in the event. The data are from proton-proton collisions at s = 7 TeV, corresponding to an integrated luminosity of 4.8 fb−1, collected with the CMS detector at the LHC. Evidence of a decrease in these ratios as a function of the particle multiplicity is observed, more pronounced at low transverse momentum pTμμ. For ϒ(nS) mesons with pTμμ> 7 GeV, where most of the data were collected, the correlation with multiplicity is studied as a function of the underlying event transverse sphericity and the number of particles in a cone around the ϒ(nS) direction. The ratios are found to be multiplicity independent for jet-like events. The mean pTμμ values for the ϒ(nS) states as a function of particle multiplicity are also measured and found to grow more steeply as their mass increases. [Figure not available: see fulltext.]
dc.identifier.citationInvestigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV / Sirunyan, A.M. [et al.] // Journal of High Energy Physics. - 2020. - 2020. - № 11. - 10.1007/JHEP11(2020)001
dc.identifier.doi10.1007/JHEP11(2020)001
dc.identifier.urihttps://www.doi.org/10.1007/JHEP11(2020)001
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85096395259&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000585126400001
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/22602
dc.relation.ispartofJournal of High Energy Physics
dc.titleInvestigation into the event-activity dependence of ϒ(nS) relative production in proton-proton collisions at √s = 7 TeV
dc.typeArticle
dspace.entity.typePublication
oaire.citation.issue11
oaire.citation.volume2020
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