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arXiv · 1408.0342

Angular distribution and forward-backward asymmetry of the Higgs-boson decay to photon and lepton pair

Alexander Yu. Korchin·Vladimir A. Kovalchuk
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Abstract

The Higgs-boson decay h -> gamma l+ l- for various lepton states l = (e, mu, tau) is analyzed. The differential decay width and forward-backward asymmetry are calculated as functions of the dilepton invariant mass in a model where the Higgs boson interacts with leptons and quarks via a mixture of scalar and pseudoscalar couplings. These couplings are partly constrained from data on the decays to leptons, h -> l+ l-, and quarks h -> q \bar{q} (where q = (c, b)), while the Higgs couplings to the top quark are chosen from the two-photon and two-gluon decay rates. Nonzero values of the forward-backward asymmetry will manifest effects of new physics in the Higgs sector. The decay width and asymmetry integrated over the dilepton invariant mass are also presented.

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Alexander Yu. Korchin, Vladimir A. Kovalchuk. 2014-11-11. Angular distribution and forward-backward asymmetry of the Higgs-boson decay to photon and lepton pair. https://doi.org/10.1140/epjc%2Fs10052-014-3141-7

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