Energy dependence of dissociative J/Ψ photoproduction as a signature of gluon saturation at the LHC

被引：65

作者：

Cepila, J. ^{[1
]}

Contreras, J. G. ^{[1
]}

Takaki, J. D. Tapia ^{[2
]}

机构：

[1] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Prague, Czech Republic

[2] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

来源：

PHYSICS LETTERS B | 2017年 / 766卷

关键词：

Gluon saturation; Vector meson photoproduction; LHC; PB-PB COLLISIONS; ROOT-S(NN)=2.76 TEV; VECTOR-MESONS; SMALL-X; HERA; QCD; ELECTROPRODUCTION; SCATTERING; PROTON;

D O I：

10.1016/j.physletb.2016.12.063

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have developed a model in which the quantum fluctuations of the proton structure are characterised by hot spots, whose number grows with decreasing Bjorken-x. Our model reproduces the F-2(x, Q(2)) data from HERA at the relevant scale, as well as the exclusive and dissociative J/Psi photoproduction data from H1 and ALICE. Our model predicts that forW(gamma p)approximate to 500GeV, the dissociative J/Psi cross section reaches a maximum and then decreases steeply with energy, which is in qualitatively good agreement to a recent observation that the dissociative J/Psi background in the exclusive J/Psi sample measured in photoproduction by ALICE decreases as energy increases. Our prediction provides a clear signature for gluon saturation at LHC energies. (C) 2017 The Authors. Published by Elsevier B.V.

引用

页码：186 / 191

页数：6

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