arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1608.07559hep-ph
收藏

作为LHC胶子饱和信号的离解$\mathrm{J/}ψ$光生的能量依赖性

Energy dependence of dissociative $\mathrm{J/}ψ$ photoproduction as a signature of gluon saturation at the LHC

J. Cepila, J. G. Contreras, J. D. Tapia Takaki

备注：
10 pages plus references, 3 figures. This version matches accepted version
发表信息：
Phys.Lett. B766 (2017) 186-191
阅读 PDF
arXiv 页面 ↗HTML 原文 ↗

摘要：

我们已经开发了一个模型，其中质子结构的量子涨落的特点是热点，其数量的增长与减少Bjorken- $x$。我们的模型再现了相关尺度下HERA的$F_2(x,Q^2)$数据，以及H1和ALICE的排他性和解离性$\mathrm{J/}ψ$光产生数据。我们的模型预测，对于$W_{γ\mathrm{p}} \approx 500$ GeV，解离的$\mathrm{J/}ψ$截面达到最大值，然后急剧下降的能量，这是在定性良好的协议，最近的观察，解离的$\mathrm{J/}ψ$背景中的独家$\mathrm{J/}ψ$样品测量ALICE的光产生减少，随着能量的增加。我们的预测提供了一个明确的签名胶子饱和在LHC的能量。

英文摘要：

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 $\mathrm{J/}ψ$ photoproduction data from H1 and ALICE. Our model predicts that for $W_{γ\mathrm{p}} \approx 500$ GeV, the dissociative $\mathrm{J/}ψ$ cross section reaches a maximum and then decreases steeply with energy, which is in qualitatively good agreement to a recent observation that the dissociative $\mathrm{J/}ψ$ background in the exclusive $\mathrm{J/}ψ$ sample measured in photoproduction by ALICE decreases as energy increases. Our prediction provides a clear signature for gluon saturation at LHC energies.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

↑