Probing the charm-Higgs-Yukawa coupling via Higgs boson decay to hc plus a photon

• Published in: Journal of physics. G, Nuclear and particle physics Vol. 46; no. 10
• Main Authors: Mao, Song, Guo-He, Yang, Gang, Li, Yu, Zhang, Jian-You, Guo
• Format: Journal Article
• Language: English
• Published: IOP Publishing 06.09.2019
• Subjects: Higgs boson; meson; Yukawa coupling
• ISSN: 0954-3899; 1361-6471
• DOI: 10.1088/1361-6471/ab1a6e

In this paper, we investigate the decay of the Higgs boson to hc plus a photon in the non-relativistic quantum chromodynamics (QCD) theoretical framework. Compared with the Higgs decay to J/ plus a photon channel, this process makes a indirect contribution, and can be used to detect the Yukawa coupling of Higgs and charm quarks. The results show that the decay branch ratio of this process is about 10−8. If we take into account the 10−3 efficiency in the hc detection, no events will be available even in the case of 30 ab−1 luminosity at FCC-pp with a 100 TeV center of mass energy. However, if the detection efficiency of hc is greatly improved in the future, this process will play an important role in linear e+ e− future colliders and at LHCb. Moreover, this process should also play an important role when the anomalous charm-Yukawa couplings are larger and direct sensitivity.