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arXiv 1404.5502hep-exnucl-ex
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寻找轻质量规范玻色子解释MAMI的$(g-2)_μ$异常

Search for light massive gauge bosons as an explanation of the $(g-2)_μ$ anomaly at MAMI

H. Merkel, P. Achenbach, C. Ayerbe Gayoso, T. Beranek, J. Beričič, J. C. Bernauer, R. Böhm, D. Bosnar, L. Correa, L. Debenjak, A. Denig, M. O. Distler, A. Esser… 展开作者

H. Merkel, P. Achenbach, C. Ayerbe Gayoso, T. Beranek, J. Beričič, J. C. Bernauer, R. Böhm, D. Bosnar, L. Correa, L. Debenjak, A. Denig, M. O. Distler, A. Esser, H. Fonvieille, I. Friščić, M. Gómez Rodríguez de la Paz, M. Hoek, S. Kegel, Y. Kohl, D. G. Middleton, M. Mihovilovič, U. Müller, L. Nungesser, J. Pochodzalla, M. Rohrbeck, G. Ron, S. Sánchez Majos, B. S. Schlimme, M. Schoth, F. Schulz, C. Sfienti, S. Širca, M. Thiel, A. Tyukin, A. Weber, M. Weinriefer

摘要:

一个大质量但轻的阿贝尔U(1)规范玻色子是粒子物理学标准模型之外的物理学的一个很好的动机可能的签名。本文描述了在美因茨微波加速器A1合作组(MAMI)的谱仪装置上寻找电子-正电子对产生中的U(1)规范玻色子信号的情况。排除限制在40兆电子伏至300兆电子伏的混合参数的灵敏度下降到$ε^2 = 8\times 10^{-7}$的质量范围内。参数空间的很大一部分被排除在外,其中测量的μ子反常磁矩与理论的差异可能由额外的U(1)规范玻色子解释。

英文摘要:

A massive, but light abelian U(1) gauge boson is a well motivated possible signature of physics beyond the Standard Model of particle physics. In this paper, the search for the signal of such a U(1) gauge boson in electron-positron pair-production at the spectrometer setup of the A1 Collaboration at the Mainz Microtron (MAMI) is described. Exclusion limits in the mass range of 40 MeV up to 300 MeV with a sensitivity in the mixing parameter of down to $ε^2 = 8\times 10^{-7}$ are presented. A large fraction of the parameter space has been excluded where the discrepancy of the measured anomalous magnetic moment of the muon with theory might be explained by an additional U(1) gauge boson.

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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