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	Suppression of excited gamma states relative to the ground state in pb-pb collisions at root s(nn)=5.02 tev
	Sirunyan, A. M.1; Tumasyan, A.1; Adam, W.2; Asilar, E.2; Bergauer, T.2; Brandstetter, J.2; Brondolin, E.2; Dragicevic, M.2; Eroe, J.2; Flechl, M.2
刊名	Physical review letters
	2018-04-02
卷号	120期号:14页码:17
ISSN号	0031-9007
DOI	10.1103/physrevlett.120.142301
通讯作者	Sirunyan, a. m.()
英文摘要	The relative yields of gamma mesons produced in pp and pb-pb collisions at root s(nn) = 5.02 tev and reconstructed via the dimuon decay channel are measured using data collected by the cms experiment. double ratios are formed by comparing the yields of the excited states, gamma(2s) and gamma(3s), to the ground state, gamma(1s), in both pb-pb and pp collisions at the same center-of-mass energy. the double ratios, [gamma(ns)/gamma(1s)](pb-pb)/[gamma(ns)/gamma(1s)](pp), are measured to be 0.308 +/- 0.055(stat) +/- 0.019(syst) for the gamma(2s) and less than 0.26 at 95% confidence level for the gamma(3s). no significant gamma(3s) signal is found in the pb-pb data. the double ratios are studied as a function of collision centrality, as well as gamma transverse momentum and rapidity. no significant dependencies are observed.
WOS关键词	RAPIDITY ; MODEL
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000428966400003
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2178174
专题	高能物理研究所
通讯作者	Sirunyan, A. M.
作者单位	1.Yerevan Phys Inst, Yerevan, Armenia 2.Inst Hochenergiephys, Vienna, Austria 3.Inst Nucl Problems, Minsk, Byelarus 4.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 5.Univ Antwerp, Antwerp, Belgium 6.Vrije Univ Brussel, Brussels, Belgium 7.Univ Libre Bruxelles, Brussels, Belgium 8.Univ Ghent, Ghent, Belgium 9.Catholic Univ Louvain, Louvain, Belgium 10.Univ Mons, Mons, Belgium
推荐引用方式 GB/T 7714	Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Suppression of excited gamma states relative to the ground state in pb-pb collisions at root s(nn)=5.02 tev[J]. Physical review letters,2018,120(14):17.
APA	Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Asilar, E..,Bergauer, T..,...&Butler, P. H..(2018).Suppression of excited gamma states relative to the ground state in pb-pb collisions at root s(nn)=5.02 tev.Physical review letters,120(14),17.
MLA	Sirunyan, A. M.,et al."Suppression of excited gamma states relative to the ground state in pb-pb collisions at root s(nn)=5.02 tev".Physical review letters 120.14(2018):17.

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