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	Observation of gamma(1s) pair production in proton-proton collisions at root s=8 tev
	Khachatryan, V.1; Sirunyan, A. M.; Tumasyan, A.; Adam, W.2; Asilar, E.2; Bergauer, T.2; Brandstetter, J.2; Brondolin, E.2; Dragicevic, M.2; Eroe, J.2
刊名	Journal of high energy physics
	2017-05-03
期号	5页码:34
关键词	Hadron-hadron scattering (experiments) Quarkonium
ISSN号	1029-8479
DOI	10.1007/jhep05(2017)013
通讯作者	Khachatryan, v.()
英文摘要	Pair production of gamma(1s) mesons is observed at the lhc in proton-proton collisions at root s = 8 tev by the cms experiment in a data sample corresponding to an integrated luminosity of 20.7 fb(-1). both gamma(1s) candidates are fully reconstructed via their decays to mu(+) mu(-). the fiducial acceptance region is defined by an absolute gamma(1s) rapidity smaller than 2.0. the fiducial cross section for the production of gamma(1s) pairs, assuming that both mesons decay isotropically, is measured to be 68.8 +/- 12.7 (stat) +/- 7.4 (syst) +/- 2.8 (b) pb, where the third uncertainty comes from the uncertainty in the branching fraction of gamma(1s) decays to mu(+) mu(-). assuming instead that the gamma(1s) mesons are produced with different polarizations leads to variations in the measured cross section in the range from 38% to +36%.
WOS关键词	DOUBLE PARTON SCATTERINGS ; HADRONIC PRODUCTION ; SMALL-X ; QCD ; QUARKONIUM ; COHERENCE ; MESON
WOS研究方向	Physics
WOS类目	Physics, Particles & Fields
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000400871100001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2177439
专题	高能物理研究所
通讯作者	Khachatryan, V.
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	Khachatryan, V.,Sirunyan, A. M.,Tumasyan, A.,et al. Observation of gamma(1s) pair production in proton-proton collisions at root s=8 tev[J]. Journal of high energy physics,2017(5):34.
APA	Khachatryan, V..,Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Asilar, E..,...&Magana Villalba, R..(2017).Observation of gamma(1s) pair production in proton-proton collisions at root s=8 tev.Journal of high energy physics(5),34.
MLA	Khachatryan, V.,et al."Observation of gamma(1s) pair production in proton-proton collisions at root s=8 tev".Journal of high energy physics .5(2017):34.

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