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arXiv 2103.01862hep-phhep-exnucl-exnucl-th
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在$pPb$和$PbPb$碰撞中寻找低质量类轴子粒子

Searching for axionlike particles with low masses in $pPb$ and $PbPb$ collisions

V. P. Goncalves, D. E. Martins, M. S. Rangel

摘要:

研究了LHC超周边$Pb - p$和$Pb - Pb$碰撞中小质量类轴子粒子的产生。考虑到一组现实的运动学切割的横截面和运动学分布相关联的双光子的最终状态中产生的$γγ\rightarrow a \rightarrow γγ$子过程的估计。对背景进行详细分析,并得出对ALP生产的预期敏感度。我们的研究结果表明,未来的实验分析的独家双光子生产的前向快速探测的LHCb探测器可以提高现有的排除限制的ALP光子耦合的质量范围为2 GeV $\le m_a \le$ 5 GeV。

英文摘要:

The production of axionlike particles (ALPs) with small masses in ultraperipheral $Pb - p$ and $Pb - Pb$ collisions at the LHC is investigated. The cross section and kinematical distributions associated to the diphoton final state produced in the $γγ\rightarrow a \rightarrow γγ$ subprocesses are estimated considering a realistic set of kinematical cuts. A detailed analysis of the backgrounds is performed and the expected sensitivity to the ALP production is derived. Our results demonstrate that a future experimental analysis of the exclusive diphoton production for the forward rapidities probed by the LHCb detector can improve the existing exclusion limits on the ALP - photon coupling in the mass range 2 GeV $\le m_a \le$ 5 GeV.

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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