Dark photon pair production via off-shell dark Higgs at FASER

被引：0

作者：

Takeshi Araki ^{[1
]}

Kento Asai ^{[2
]}

Yohei Nakashima ^{[3
]}

Takashi Shimomura ^{[4
]}

机构：

[1] Ohu University,Faculty of Dentistry

[2] Institute for Cosmic Ray Research (ICRR),Department of Physics

[3] The University of Tokyo,Faculty of Education

[4] Kyushu University,undefined

[5] Miyazaki University,undefined

来源：

Journal of High Energy Physics | / 2024卷 / 12期

关键词：

New Light Particles; Multi-Higgs Models; New Gauge Interactions;

D O I：

10.1007/JHEP12(2024)124

中图分类号：

学科分类号：

摘要：

We consider a dark photon model in which the dark U(1) gauge symmetry is spontaneously broken by a vacuum expectation value of a new scalar boson. We focus on the ForwArd Search ExpeRiment (FASER) and calculate its sensitivity to the dark photon produced from the off-shell decay of the new scalar boson. It is found that the off-shell production extends the sensitivity region beyond the kinematical threshold of the on-shell decay of the scalar boson, and that the sensitivity region can be spanned to unexplored region. We also show the parameter space in which perturbative calculation is valid for the unitarity of an S matrix.

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