Higgs two-gluon decay and the top-quark chromomagnetic moment

2012/10/11 by Lance Labun, Johann Rafelski, Labun, Lance +1
Physics and Astronomy · Computer Science · #Particle physics theoretical and experimental studies #Computational Physics and Python Applications #Quantum Chromodynamics and Particle Interactions

paper · pdf · doi:10.48550/arxiv.1210.3150

Abstract

We study the top quark chromomagnetic factor κ_t-dependence of the effective interaction \cal L_hgg and apply the result to the case of Higgs two gluon decay rate Γ_{h→ gg}. Perturbative standard model provides κ_t< 2, and for the standard model value Γ_{h→ gg}(κ_t) is suppressed by 9% as compared to κ_t= 2. We further show that in the leading order Γ_{h→ gg} for κ_t≃ ± 1.2 can be very small due to complete cancelation between the top and bottom quark fluctuations. We discuss the extension of our results to κ_t>2 and consider potential paths to obtain experimental information for the h→ gg rate.

Related

• Two-Loop Contributions to the Anomalous Chromomagnetic Dipole Moment of the Top Quark in Two-Higgs-Doublet Models
• Top anomalous chromomagnetic dipole moment in a two Higgs doublet model
• Chromomagnetic dipole moment of the top quark in the Bestest Little Higgs model
• The Anomalous Chromomagnetic Dipole Moment of the Top Quark
• SUSY and the decay H₂⁰-->gg