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arXiv 2201.04658hep-phhep-ex
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希格斯玻色子玻色子半不可见衰变中暗光子性质的测量

Measuring properties of a dark photon from semi-invisible decay of the Higgs boson

Hugues Beauchesne, Cheng-Wei Chiang

摘要:

通过希格斯玻色子衰变为光子和不可见粒子,人们已经付出了相当大的努力来发现暗光子。一个尚未探索的问题是,如果在这个通道中发现过量的暗光子,那么在LHC上可以测量暗光子的哪些特性,以及我们是否可以确定这个信号是否确实是暗光子的信号。在本文中,我们试图解决这些问题的两个希格斯生产渠道:胶子融合和$Z$相关。首先,对无质量暗光子的质量上限和有质量暗光子的质量不确定性进行了展望。其次,我们研究了区分这个信号的希格斯衰变到一个引力伴子和一个中性伴子,衰变到一个光子和另一个引力伴子。最后,研究了观测希格斯粒子衰变为暗光子和$Z$玻色子的互补可能性。

英文摘要:

Considerable efforts have been dedicated to discovering a dark photon via the decay of the Higgs boson to a photon and an invisible particle. A subject that is still mostly unexplored is which properties of the dark photon could be measured at the LHC if an excess were to be found in this channel and whether we could determine if this signal is indeed that of a dark photon. In this paper, we seek to address some of these questions for two Higgs production channels: gluon-fusion and $Z$-associated. First, prospects are presented for the upper limit on the mass of a massless dark photon and for the uncertainty on the mass of a massive dark photon. Second, we study the feasibility of distinguishing this signal from that of the Higgs decaying to a gravitino and a neutralino that decays to a photon and another gravitino. Finally, the complementary possibility of observing the decay of the Higgs to a dark photon and a $Z$ boson is studied.

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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