M ar 2 01 6 B c Production in Higgs Boson Decays

X iv :1 51 2. 01 32 7v 2 [ he pph ] 6 M ar 2 01 6 Bc Production in Higgs Boson Decays Jun Jiang and Cong-Feng Qiao School of Physics, University of Chinese Academy of Sciences, YuQuan Road 19A, Beijing 100049, China Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences and CAS Center for Excellence in Particle Physics, Beijing 100049, China Abstract Bc production rate in Higgs boson decays is evaluated in NRQCD framework. Given Higgs total decay width is about 4.20 MeV and the vector B c meson decays completely to the ground state, we find that the branching fraction of Bc meson production in Higgs decays is 8.50 × 10−4, where both leading QCD and QED contributions are included. This process is hence detectable in the high-luminosity/energy LHC. It is found that the coupling of Hbb̄ dominate the processes, contributions from the triangle top quark loop and other couplings (Hcc̄, HWW and HZZ) are small. In confronting to the quarkonia production, we find that the fraction rate of Bc production is more than an order of magnitude bigger than those of charmonium and bottomonium production in Higgs decays. Moreover, various uncertainties and differential distributions of the concerned processes are analysed carefully.