Study of Z Boson Production in PbPb Collisions at root s(NN)=2.76 TeV

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题名:	Study of Z Boson Production in PbPb Collisions at root s(NN)=2.76 TeV
作者:	Chatrchyan,S;Khachatryan,V;Sirunyan,AM;Tumasyan,A;Adam,W;Bergauer,T;Dragicevic,M;Ero,J;Fabjan,C;Friedl,M;Fruhwirth,R;...etc.
贡献者:	物理學系
关键词:	HEAVY-ION COLLISIONS;LHC
日期:	2011
上传时间:	2012-06-11 10:54:11 (UTC+8)
出版者:	國立中央大學
摘要:	A search for Z bosons in the mu(+)mu(-) decay channel has been performed in PbPb collisions at root s(NN) = 2.76 TeV with the CMS detector at the LHC, in a 7.2 mu b(-1) data sample. The number of opposite-sign muon pairs observed in the 60-120 GeV/c(2) invariant mass range is 39, corresponding to a yield per unit of rapidity (y) and per minimum bias event of [33.8 +/- 5.5(stat) +/- 4.4(syst)] x 10(-8), in the vertical bar y vertical bar < 2.0 range. Rapidity, transverse momentum, and centrality dependencies are also measured. The results agree with next-to-leading order QCD calculations, scaled by the number of incoherent nucleon-nucleon collisions.
關聯:	PHYSICAL REVIEW LETTERS
显示于类别:	[物理學系] 期刊論文

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