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

Abstract

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 N ⁴LO 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.

Authors:

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

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+ Show Author Affiliations

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

Publication Date:

2019-08-20

Research Org.:

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

Sponsoring Org.:

USDOE; Natural Science Foundation of China (NSFC)

OSTI Identifier:

1562462

Grant/Contract Number:  

AC02-76SF00515

Resource Type:

Accepted Manuscript

Journal Name:

Chinese Physics. C, High Energy Physics and Nuclear Physics

Additional Journal Information:

Journal Volume: 43; Journal Issue: 9; Journal ID: ISSN 1674-1137

Publisher:

IOP Publishing

Country of Publication:

United States

Language:

English

Subject:

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS