Properties of the decay ${{H\to\gamma\gamma}} $ using the approximate ${{\alpha_s^4}}$ corrections and the principle of maximum conformality

Yu, Qing; Wu, Xing-Gang; Wang, Sheng-Quan; Huang, Xu-Dong; Shen, Jian-Ming; Zeng, Jun

doi:10.1088/1674-1137/43/9/093102

Title: Properties of the decay $${{H\to\gamma\gamma}} $$ using the approximate $${{\alpha_s^4}}$$ corrections and the principle of maximum conformality

Journal Article · Tue Aug 20 00:00:00 EDT 2019 · Chinese Physics. C, High Energy Physics and Nuclear Physics

DOI:https://doi.org/10.1088/1674-1137/43/9/093102· OSTI ID:1562462

Yu, Qing ^[1]; Wu, Xing-Gang ^[1]; Wang, Sheng-Quan ^[2]; Huang, Xu-Dong ^[1]; Shen, Jian-Ming ^[3]; Zeng, Jun ^[1]

Chongquing Univ. (China)
SLAC National Accelerator Lab., Menlo Park, CA (United States); Guizhou Minzu Univ., Guiyang (China)
Hunan Univ., Changsha (China)

The decay channel $$ H\to\gamma\gamma $$ is an important channel for probing the properties of the Higgs boson. In this paper, we analyze its decay width by using the perturbative QCD corrections up to the $$ \alpha_s^4 $$ order with the help of the principle of maximum conformality (PMC). PMC has been suggested in literature for eliminating the conventional renormalization scheme-and-scale ambiguities. After applying PMC, we observe that an accurate renormalization scale independent decay width $$ \Gamma(H\to\gamma\gamma) $$ up to the N⁴LO level can be achieved. Taking the Higgs mass, $$ M_{\rm H} = 125.09\pm $$ $$ 0.21\pm0.11 $$ GeV, given by the ATLAS and CMS collaborations, we obtain $$ \Gamma(H\to \gamma\gamma)|_{\rm LHC} = 9.364^{+0.076}_{-0.075} $$ KeV.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE; Natural Science Foundation of China (NSFC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1562462

Journal Information:: Chinese Physics. C, High Energy Physics and Nuclear Physics, Vol. 43, Issue 9; ISSN 1674-1137

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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