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001-es BibID:	BIBFORM119412
035-os BibID:	(Scopus)85060438181 (WOS)000460118200032
Első szerző:	CMS Collaboration
Cím:	Measurement of nuclear modification factors of [gamma](1S), [gamma](2S), and [gamma](3S) mesons in PbPb collisions at root{s}_(NN) = 5.02 TeV / The CMS Collaboration
Dátum:	2019
ISSN:	0370-2693
Megjegyzések:	The cross sections for gamma(1S), gamma(2S), and gamma(3S) production in lead-lead (PbPb) and proton-proton (pp) collisions at root s_(NN) = 5.02 TeV have been measured using the CMS detector at the LHC. The nuclear modification factors, R-AA, derived from the PbPb-to-pp ratio of yields for each state, are studied as functions of meson rapidity and transverse momentum, as well as PbPb collision centrality. The yields of all three states are found to be significantly suppressed, and compatible with a sequential ordering of the suppression, R_AA(T(1S)) > R_AA(gamma(2S)) > R_AA(gamma(3S)). The suppression of [gamma](1S) is larger than that seen at root{s}_(NN) = 2.76 TeV, although the two are compatible within uncertainties. The upper limit on the R_(AA) of gamma(3S) integrated over p_(T), rapidity and centrality is 0.096 at 95% confidence level, which is the strongest suppression observed for a quarkonium state in heavy ion collisions to date.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Bottomonium CMS Heavy ion collisions Physics Quark gluon plasma Quarkonium suppression
Megjelenés:	Physics Letters B. - 790 (2019), p. 270-293. -
További szerzők:	Karancsi János (1987-) (fizikus) Bartók Márton (fizikus) Raics Péter (1944-) (fizikus) Trócsányi Zoltán (1961-) (fizikus) Ujvári Balázs (1977-) (fizikus)
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