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arXiv 2004.04469hep-ph
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NA64实验中类轴子的光生

Photoproduction of axion-like particles in the NA64 experiment

R. R. Dusaev, D. V. Kirpichnikov, M. M. Kirsanov

摘要:

在高能光子散射$γN\to N a$离开原子核后的$a\to γγ$衰变过程中,可以观察到与标准模型规范场耦合的类轴子粒子$a$(ALPs).在本文中,我们描述了ALP生产截面的计算和这种生产的性质。该截面公式已在CERN SPS的主动电子束流收集装置NA 64实验的事例模拟程序中实现。我们研究了NA64实验的前景,以寻找ALP在$10\, \mbox{MeV} \lesssim m_a\lesssim 100$ MeV的质量范围内的统计数据对应于高达$5\times 10^{12}$电子靶(EOT)。

英文摘要:

Axion-like particles $a$ (ALPs) that couple to the Standard Model (SM) gauge fields could be observed in the high-energy photon scattering $γN\to N a$ off nuclei followed by the $a\to γγ$ decay. In the present paper we describe the calculation of the ALP production cross-section and the properties of this production. The cross section formulas are implemented in the program for the simulation of events in the NA64 experiment, the active electron beam dump facility at the CERN SPS. We study the prospects of the NA64 experiment to search for ALP in the $10\, \mbox{MeV} \lesssim m_a\lesssim 100$ MeV mass range for the statistics corresponding to up to $5\times 10^{12}$ electrons on target (EOT).

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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