Next-to-Leading Order QCD Corrections to the Decay Width $H \to Z \gamma$

F. Moriello; H. Frellesvig; J. M. Henn; R. Bonciani; V. A. Smirnov; V. Del Duca

Next-to-Leading Order QCD Corrections to the Decay Width H to Z γ

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arxiv 1505.00567 v1 pith:LJ2NIR3D submitted 2015-05-04 hep-ph

Next-to-Leading Order QCD Corrections to the Decay Width H to Z γ

R. Bonciani , V. Del Duca , H. Frellesvig , J. M. Henn , F. Moriello , V. A. Smirnov This is my paper

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We present the analytic calculation of the two-loop QCD corrections to the decay width of a Higgs boson into a photon and a $Z$ boson. The calculation is carried out using integration-by-parts identities for the reduction to master integrals of the scalar integrals, in terms of which we express the amplitude. The calculation of the master integrals is performed using differential equations applied to a set of functions suitably chosen to be of uniform weight. The final result is expressed in terms of logarithms and polylogarithmic functions $\text{Li}_2$, $\text{Li}_3$, $\text{Li}_4$ and $\text{Li}_{2,2}$.

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Higgs Decays to $Z\gamma$ and $\gamma\gamma$ in the Flavor-Gauged Two Higgs Doublet Model
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In the flavor-gauged two Higgs doublet model, h to Z gamma receives unique modifications from f fbar Z vertex corrections while both decays are sensitive to charged Higgs loops, with viable parameter space identified ...