Constraining wrong-sign $hbb$ couplings with $h\to {\rm Y}\gamma$

Abstract

The rare decay $h\to {\rm Y}\gamma$ has a very small rate in the Standard Model, due to a strong cancellation between the direct and indirect diagrams. Models with a changed $hbb$ coupling can thus lead to a great increase in this decay. Current limits on two Higgs doublet models still allow for the possibility that the $hbb$ coupling might have a sign opposite to the Standard Model; the so-called "wrong-sign". We show how $h\to {\rm Y}\gamma$ can be used to put limits on the wrong-sign solutions.

7 pages, 3 figures

References in corpus (9)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• SusHi: A program for the calculation of Higgs production in gluon fusion and bottom-quark annihilation in the Standard Model and the MSSM
• The oblique parameters in multi-Higgs-doublet models
• An Exclusive Window onto Higgs Yukawa Couplings
• $h\to Z\gamma$ in the complex two Higgs doublet model
• Wrong sign and symmetric limits and non-decoupling in 2HDMs
• Relativistic corrections to Higgs boson decays to quarkonia
• A reappraisal of the wrong-sign $hb\overline{b}$ coupling and the study of $h\to Z\gamma$

Cited by in corpus (2)

• Higgs data does not rule out a sequential fourth generation with an extended scalar sector
• Wrong sign Yukawa coupling of the 2HDM plus a singlet scalar dark matter confronted with dark matter and Higgs data