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arXiv 1607.01022hep-phhep-ex
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类轴子粒子对轻子偶极矩的贡献

Contributions of axion-like particles to lepton dipole moments

W. J. Marciano, A. Masiero, P. Paradisi, M. Passera

摘要:

研究了自旋为0的类轴子粒子(ALP)对轻子偶极矩g-2和EDMs的贡献。Barr-Zee和光的光回路效应从轻赝标ALP被发现能够解决长期存在的μ子g-2的差异,在相对较大的ALP-γ射线耦合的代价。这种大耦合的直接实验约束和微扰么正性界限的兼容性进行了讨论。这种情况下的未来测试进行了说明。对于CP违反ALP耦合,发现电子EDM探测更小,理论上更容易容纳ALP相互作用。电子EDM搜索的未来计划的改进,主张作为一种方式,不仅显着约束ALP参数,但也有可能揭示一个新的来源,CP破坏,可能有深远的影响。

英文摘要:

Contributions of a spin 0 axion-like particle (ALP) to lepton dipole moments, g-2 and EDMs, are examined. Barr-Zee and light-by-light loop effects from a light pseudoscalar ALP are found to be capable of resolving the long-standing muon g-2 discrepancy at the expense of relatively large ALP-gammagamma couplings. The compatibility of such large couplings with direct experimental constraints and perturbative unitarity bounds is discussed. Future tests of such a scenario are described. For CP violating ALP couplings, the electron EDM is found to probe much smaller, theoretically more easily accommodated ALP interactions. Future planned improvement in electron EDM searches is advocated as a way to not only significantly constrain ALP parameters but also, to potentially unveil a new source of CP violation which could have far reaching ramifications.

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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