Constraining wrong-sign $hbb$ couplings with $h \rightarrow \Upsilon \gamma$

@article{Modak2016ConstrainingW,
  title={Constraining wrong-sign \$hbb\$ couplings with \$h \rightarrow \Upsilon \gamma\$},
  author={Tanmoy Modak and Jorge C. Rom{\~a}o and Soumya Sadhukhan and Jo{\~a}o Pedro Silva and Rahul Srivastava},
  journal={Physical Review D},
  year={2016},
  pages={075017}
}
The rare decay $h \rightarrow \Upsilon \gamma$ 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 $h \rightarrow \Upsilon \gamma$ can be used to put limits on… Expand

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References

SHOWING 1-10 OF 21 REFERENCES
Wrong sign and symmetric limits and non-decoupling in 2HDMs
A bstractWe analyse the possibility that, in two Higgs doublet models, one or more of the Higgs couplings to fermions or to gauge bosons change sign, relative to the respective Higgs Standard ModelExpand
Probing wrong-sign Yukawa couplings at the LHC and a future linear collider
We consider the two-Higgs-doublet model as a framework in which to evaluate the viability of scenarios in which the sign of the coupling of the observed Higgs boson to down-type fermions (inExpand
h → Zγ in the complex two Higgs doublet model
A bstractThe latest LHC data confirmed the existence of a Higgs-like particle and made interesting measurements on its decays into γγ, ZZ*, W W*, τ+τ−, and bb¯$$ b\overline{b} $$. It is expected thatExpand
Higgs boson decays to quarkonia and the $H\bar{c}c$ coupling
In this paper we discuss decays of the Higgs boson to quarkonia in association with a photon. We identify a new mechanism for producing such final states in Higgs decays that leads to predictions forExpand
Higgs at last
A bstractWe update the experimental constraints on the parameters of the Higgs effective Lagrangian. We combine the most recent LHC Higgs data in all available search channels with electroweakExpand
First Glimpses at Higgs’ face
A bstractThe 8 TeV LHC Higgs search data just released indicates the existence of a scalar resonance with mass ~ 125 GeV. We examine the implications of the data reported by ATLAS, CMS and theExpand
Global fit to Higgs signal strengths and couplings and implications for extended Higgs sectors
The most recent LHC data have provided a considerable improvement in the precision with which various Higgs production and decay channels have been measured. Using all available public results fromExpand
Relativistic corrections to Higgs boson decays to quarkonia
We improve the theoretical predictions for the decays of the Higgs boson to an $S$-wave vector quarkonium plus a photon by calculating the relativistic correction of order $v^2$, where $v$ is theExpand
Note on tree-level unitarity in the general two Higgs doublet model
Abstract Tree-level unitarity constraints on the masses of the Higgs bosons in the general Two Higgs Doublet Model (THDM) are studied. We first consider the case where the Higgs potential isExpand
The electroweak fit of the standard model after the discovery of a new boson at the LHC
In view of the discovery of a new boson by the ATLAS and CMS Collaborations at the LHC, we present an update of the global Standard Model (SM) fit to electroweak precision data. Assuming the newExpand
...
1
2
3
...