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arXiv 1406.3897hep-ph
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通过CERN LHC的光-光散射的大额外维效应

Large Extra Dimension effects through Light-by-Light Scattering at the CERN LHC

Hao Sun

摘要:

在大型强子对撞机(LHC)上观测光与光的散射已经受到了相当多的关注,它被认为是一个干净而敏感的通道,可能的新物理。本文在大额外维(LED)模型下研究了LHC中引力子交换过程$\rm pp\rightarrow pγγp\rightarrow pγγp$中双光子的产生。通常,当我们进行背景分析时,我们还研究PDMATHAMN生产的双坡密子交换(DPE)。我们比较了夸克-夸克碰撞模式和胶子-胶子碰撞模式的产生,发现胶子-胶子碰撞模式的贡献与夸克-夸克碰撞模式的贡献相当。我们的结果表明,对于额外的维度$δ=4$,在14 TeV的LHC的积分光度$\rm {\cal L} = 200 fb^{-1}$,通过引力子交换的双光子产生可以探测LED效应的规模$\rm M_S=5.06 (4.51, 5.11) TeV$的前向探测器接受$ξ_1 (ξ_2, ξ_3)$,分别为$0.0015<ξ_1<0.5$,$0.1<ξ_2<0.5$和$0.0015<ξ_3<0.15$。

英文摘要:

Observing light-by-light scattering at the Large Hadron Collider (LHC) has received quite some attention and it is believed to be a clean and sensitive channel to possible new physics. In this paper, we study the diphoton production at the LHC via the process $\rm pp\rightarrow pγγp\rightarrow pγγp$ through graviton exchange in the Large Extra Dimension (LED) model. Typically, when we do the background analysis, we also study the Double Pomeron Exchange (DPE) of $γγ$ production. We compare its production in the quark-quark collision mode to the gluon-gluon collision mode and find that contributions from the gluon-gluon collision mode are comparable to the quark-quark one. Our result shows, for extra dimension $δ=4$, with an integrated luminosity $\rm {\cal L} = 200 fb^{-1}$ at the 14 TeV LHC, that diphoton production through graviton exchange can probe the LED effects up to the scale $\rm M_S=5.06 (4.51, 5.11) TeV$ for the forward detector acceptance $ξ_1 (ξ_2, ξ_3)$, respectively, where $0.0015<ξ_1<0.5$, $0.1<ξ_2<0.5$ and $0.0015<ξ_3<0.15$.

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。

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