Indications of suppression of excited? States in Pb-Pb collisions at sNN2.76 TeV

Chatrchyan, S.; Khachatryan, V.; Sirunyan, A.M.; Tumasyan, A.; Adam, W.; Bergauer, T.; Dragicevic, M.; Erö, J.; Fabjan, C.; Friedl, M.; Frühwirth, R.; Ghete, V.M.; Hammer, J.; Hänsel, S.; Hoch, M.; Hörmann, N.; Hrubec, J.; Jeitler, M.; Kiesenhofer, W.; Krammer, M.; Liko, D.; Mikulec, I.; Pernicka, M.; Rahbaran, B.; Rohringer, H.; Schöfbeck, R.; Strauss, J.; Taurok, A.; Teischinger, F.; Wagner, P.; Waltenberger, W.; Walzel, G.; Widl, E.; Wulz, C.-E.; Mossolov, V.; Shumeiko, N.; Suarez Gonzalez, J.; Bansal, S.; Benucci, L.; De Wolf, E.A.; Janssen, X.; Maes, J.; Maes, T.; Mucibello, L.; Ochesanu, S.; Roland, B.; Rougny, R.; Selvaggi, M.; Van Haevermaet, H.; Van Mechelen, P.

doi:10.1103/physrevlett.107.052302

Indications of suppression of excited? States in Pb-Pb collisions at sNN2.76 TeV

ArticleAçık Erişim

Özet

A comparison of the relative yields of Υ resonances in the μ+μ- decay channel in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair of 2.76TeV is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4GeV/c and pseudorapidity below 2.4, the double ratio of the Υ(2S) and Υ(3S) excited states to the Υ(1S) ground state in Pb-Pb and pp collisions, [Υ(2S+3S)/Υ(1S)]Pb-Pb/[Υ(2S+3S)/Υ(1S) ]pp, is found to be 0.31-0.15+0.19(stat)±0.03(syst). The probability to obtain the measured value, or lower, if the true double ratio is unity, is calculated to be less than 1%. © 2011 American Physical Society.

Anahtar Kelimeler

Binary alloys Excited states Ground state CMS detectors Decay channels Measured values Pb-Pb collisions Pp collisions Pseudorapidities Transverse momenta Upsilon resonances Lead alloys

RDL Kalıcı Bağlantı (PID)

https://rdlopen.rawdatalibrary.net/r/ebyu/15895Resmi atıflarda kullanılan kalıcı adres

DOI

https://doi.org/10.1103/physrevlett.107.052302Yayıncı resmi DOI adresi

Tam Kayıt

Alan	Değer	Dil
dc.contributor.author	Chatrchyan, S.
dc.contributor.author	Khachatryan, V.
dc.contributor.author	Sirunyan, A.M.
dc.contributor.author	Tumasyan, A.
dc.contributor.author	Adam, W.
dc.contributor.author	Bergauer, T.
dc.contributor.author	Dragicevic, M.
dc.contributor.author	Erö, J.
dc.contributor.author	Fabjan, C.
dc.contributor.author	Friedl, M.
dc.contributor.author	Frühwirth, R.
dc.contributor.author	Ghete, V.M.
dc.contributor.author	Hammer, J.
dc.contributor.author	Hänsel, S.
dc.contributor.author	Hoch, M.
dc.contributor.author	Hörmann, N.
dc.contributor.author	Hrubec, J.
dc.contributor.author	Jeitler, M.
dc.contributor.author	Kiesenhofer, W.
dc.contributor.author	Krammer, M.
dc.contributor.author	Liko, D.
dc.contributor.author	Mikulec, I.
dc.contributor.author	Pernicka, M.
dc.contributor.author	Rahbaran, B.
dc.contributor.author	Rohringer, H.
dc.contributor.author	Schöfbeck, R.
dc.contributor.author	Strauss, J.
dc.contributor.author	Taurok, A.
dc.contributor.author	Teischinger, F.
dc.contributor.author	Wagner, P.
dc.contributor.author	Waltenberger, W.
dc.contributor.author	Walzel, G.
dc.contributor.author	Widl, E.
dc.contributor.author	Wulz, C.-E.
dc.contributor.author	Mossolov, V.
dc.contributor.author	Shumeiko, N.
dc.contributor.author	Suarez Gonzalez, J.
dc.contributor.author	Bansal, S.
dc.contributor.author	Benucci, L.
dc.contributor.author	De Wolf, E.A.
dc.contributor.author	Janssen, X.
dc.contributor.author	Maes, J.
dc.contributor.author	Maes, T.
dc.contributor.author	Mucibello, L.
dc.contributor.author	Ochesanu, S.
dc.contributor.author	Roland, B.
dc.contributor.author	Rougny, R.
dc.contributor.author	Selvaggi, M.
dc.contributor.author	Van Haevermaet, H.
dc.contributor.author	Van Mechelen, P.
dc.date.accessioned	2026-10-18T20:30:44.754338438Z
dc.date.available	2026-10-18T20:30:44.754338438Z
dc.date.issued	2011
dc.description.abstract	A comparison of the relative yields of Υ resonances in the μ+μ- decay channel in Pb-Pb and pp collisions at a center-of-mass energy per nucleon pair of 2.76TeV is performed with data collected with the CMS detector at the LHC. Using muons of transverse momentum above 4GeV/c and pseudorapidity below 2.4, the double ratio of the Υ(2S) and Υ(3S) excited states to the Υ(1S) ground state in Pb-Pb and pp collisions, [Υ(2S+3S)/Υ(1S)]Pb-Pb/[Υ(2S+3S)/Υ(1S) ]pp, is found to be 0.31-0.15+0.19(stat)±0.03(syst). The probability to obtain the measured value, or lower, if the true double ratio is unity, is calculated to be less than 1%. © 2011 American Physical Society.
dc.description.sponsorship	, (GRIDPP, ST/F007094/1, ST/I000410/1, ST/F006748/1, ST/G502347/1, ST/I005912/1, ST/I002200/1, ST/I505572/1, ST/H00081X/2); ; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF, (134939, 123501); Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, SNF; UK Research and Innovation, UKRI, (53706); UK Research and Innovation, UKRI; National Science Foundation, NSF, (1068833); National Science Foundation, NSF
dc.identifier.doi	10.1103/physrevlett.107.052302
dc.identifier.issn	0031-9007
dc.identifier.issue	5
dc.identifier.scopus	2-s2.0-79961108516
dc.identifier.startpage	052302
dc.identifier.uri	https://rdlopen.rawdatalibrary.net/r/ebyu/15895
dc.identifier.volume	107
dc.language.iso	en
dc.publisher	American Physical Society
dc.relation.ispartof	Physical Review Letters
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Binary alloys
dc.subject	Excited states
dc.subject	Ground state
dc.subject	CMS detectors
dc.subject	Decay channels
dc.subject	Measured values
dc.subject	Pb-Pb collisions
dc.subject	Pp collisions
dc.subject	Pseudorapidities
dc.subject	Transverse momenta
dc.subject	Upsilon resonances
dc.subject	Lead alloys
dc.title	Indications of suppression of excited? States in Pb-Pb collisions at sNN2.76 TeV
dc.type	Article
dspace.entity.type	Publication
rdl.citation.scopus	218
rdl.oa.status	gold
rdl.source.index	SCOPUS