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タイトル
和文:Measurement of differential $J/\psi$ production cross sections and forward-backward ratios in p + Pb collisions with the ATLAS detector 
英文:Measurement of differential $J/\psi$ production cross sections and forward-backward ratios in p + Pb collisions with the ATLAS detector 
著者
和文: 山口洋平.  
英文: Youhei Yamaguchi.  
言語 English 
掲載誌/書名
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英文: 
巻, 号, ページ Vol. "C92"    No. "3"    pp. "034904"
出版年月 2015年5月 
出版者
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英文: 
会議名称
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英文: 
開催地
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英文: 
公式リンク http://inspirehep.net/record/1373747
 
DOI https://doi.org/10.1103/PhysRevC.92.034904
アブストラクト Measurements of differential cross sections for J/ψ production in p+Pb collisions at sNN=5.02 TeV at the CERN Large Hadron Collider with the ATLAS detector are presented. The data set used corresponds to an integrated luminosity of 28.1 nb−1. The J/ψ mesons are reconstructed in the dimuon decay channel over the transverse momentum range 8<pT<30GeV and over the center-of-mass rapidity range −2.87<y*<1.94. Prompt J/ψ are separated from J/ψ resulting from b-hadron decays through an analysis of the distance between the J/ψ decay vertex and the event primary vertex. The differential cross section for production of nonprompt J/ψ is compared to a FONLL calculation that does not include nuclear effects. Forward-backward production ratios are presented and compared to theoretical predictions. These results complement previously published results by covering a region of higher transverse momentum and more central rapidity. They thus constrain the kinematic dependence of nuclear modifications of charmonium and b-quark production in p+Pb

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