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125 GeV higgs decay with lepton flavor violation in the μνSSM

Chinese Physics C 2017年第4期41卷 38-49页

作者：张海斌冯太傅赵树民阎玉立孙飞 Department of Physics Hebei University State Key Laboratory of Theoretical Physics (KLTP) Institute of Theoretical PhysicsChinese Academy of Sciences College of Science China Three Gorges University

Recently,the CMS and ATLAS collaborations have reported direct searches for the 125 GeV higgs decay with lepton flavor violation,h→μτ.In this work,we analyze the signal of the lepton flavour violating（LFV） higgs decay h→μτ in the μ.from γ Supersyninietric Standard Model（μνSSM） with slepton flavor ***,we consider the constraints from the LFV decay τ→μγ,the muon anomalous magnetic dipole moment and the lightest higgs mass around 125 GeV.

关键词： supersymmetry higgs decay lepton flavor violation

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Total decay width of H → gg using the infinite-order scale-setting approach based on intrinsic conformality

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Chinese Physics C 2022年第12期46卷 172-178页

作者： Chu-Tian Gao Xing-Gang Wu Xu-Dong Huang Jun Zeng Department of Physics Chongqing Key Laboratory for Strongly Coupled PhysicsChongqing UniversityChongqing 401331China Institute of High Energy Physics CASBeijing 100049China School of Physics University of Chinese Academy of SciencesBeijing 100049China INPAC Key Laboratory for Particle Astrophysics and Cosmology(MOE)Shanghai Key Laboratory for Particle Physics and CosmologySchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China

We conducted a detailed study on the properties of the total decay width of the higgs decay channel H→gg up toα_(s)^(6)-order QCD corrections by using the newly suggested infinite-order scale-setting approach,which is based on both the principle of maximum conformality and intrinsic *** approach is called PMC_(∞) By using the PMC_(∞)approach,we observed that the conventional renormalization scale ambiguity in perturbative QCD calculation is eliminated,and the residual scale dependence due to unknown higher-order terms can also be highly *** then obtained an accurate perturbative QCD prediction on the total decay width,e.g.,Г(H→gg)|PMC_(∞)=336.42_(-6.92)^(+7.01)keV,where the errors are squared averages of those from all the mentioned error sources.

关键词： pQCD renormalization higgs decay

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H→γγ:a comment on the indeterminacy of non-gauge-invariant integrals

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Chinese Physics C 2013年第4期37卷 7-13页

作者： F.Piccinini A.Pilloni A.D.Polosa INFN Pavia-Via A.Bassi 6 I-27100PaviaItaly Dipartimento di Fisica and INFN 'Sapienza' Università di Roma-P.le A.Moro 2I-00185RomaItaly

We reanalyze the recent computation of the amplitude of the higgs boson decay into two photons presented by Gastmans et al. [1, 2]. The reasons for why this result cannot be the correct one have been discussed in some recent papers. We address here the general issue of the indeterminacy of integrals with four-dimensional gauge-breaking regulators and to which extent it might eventually be solved by imposing physical constraints. Imposing gauge invariance as the last step upon Rξ-gauge calculations with four-dimensional gauge-breaking regulators, allows us to recover the well known H→γγ result. However we show that in the particular case of the unitary gauge, the indeterminacy cannot be tackled in the same way. The combination of the unitary gauge with a cutoff regularization scheme turns out to be non-predictive.

关键词： higgs decay regularization methods loop calculations gauge invariance

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