Exploring anomalous $HZ\gamma$ couplings in $\gamma$-proton collisions at the LHC

Abstract

The $HZ\gamma$ coupling, which is highly sensitive to the new physics beyond the standard model, is studied through the process $pp\to p\gamma p\to pHX$ at the LHC. To this purpose, an effective Lagrangian, in a model independent approach, with dimension six operators is considered in this paper. New interaction terms regarding beyond the standard model physics include the Higgs boson anomalous vertices in both CP-even and CP-odd structures. A detailed numerical analysis is performed to scrutinize the accurate constraints on the effective $HZ\gamma$ couplings and to discuss how far the corresponding bounds can be improved. This is achieved by testing all the efficient Higgs decay channels and increasing the integrated luminosity at three different forward detector acceptance regions. The numerical results propose that the Higgs photoproduction at the LHC, as a complementary channel, has a great potential of exploring the $HZ\gamma$ couplings.

16 pages, 5 figures, 5 tables, version accepted for publication in PLB

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Cited by in corpus (7)

• Constraining Higgs boson effective couplings at electron-positron colliders
• Pinning down the gauge boson couplings in $WW\gamma$ production using forward proton tagging
• Central exclusive production of $W$ boson pairs in $pp$ collisions at the LHC in hadronic and semi-leptonic final states
• Photoproduction of the double $J/\psi$ (${\rm Y}$) at the LHC with forward proton tagging
• Photoproduction of $J/\psi$ with forward hadron tagging in hadronic collisions
• $H\to Z\gamma$ decay and $CP$ violation
• Hypergeometric presentation for one-loop contributing to $H\to Z\gamma$