The Z+photon and diphoton decays of the Higgs boson as a joint probe of low energy SUSY models - INSPIRE

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The Z+photon and diphoton decays of the Higgs boson as a joint probe of low energy SUSY models

Junjie Cao
(
- Henan Normal U. and
- Peking U., CHEP
)
,
Lei Wu
(
- Beijing, Inst. Theor. Phys.
)
,
Peiwen Wu
(
- Beijing, Inst. Theor. Phys.
)
,
Jin Min Yang
(
- Beijing, Inst. Theor. Phys.
)

Jan, 2013

27 pages

Published in:

JHEP 09 (2013) 043

Published: 2013

e-Print:

1301.4641 [hep-ph]

DOI:

10.1007/JHEP09(2013)043

View in:

ADS Abstract Service

reference search59 citations

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Abstract: (arXiv)

In light of recent remarkable progress in Higgs search at the LHC, we study the rare decay process

h \to Z\gamma

and show its correlation with the decay

h \to \gamma\gamma

in low energy SUSY models such as CMSSM, MSSM, NMSSM and nMSSM. Under various experimental constraints, we scan the parameter space of each model, and present in the allowed parameter space the SUSY predictions on the

Z\gamma

and

\gamma\gamma

signal rates in the Higgs production at the LHC and future e+e- linear colliders. We have following observations: (i) Compared with the SM prediction, the

Z\gamma

and

\gamma\gamma

signal rates in the CMSSM are both slightly suppressed; (ii) In the MSSM, both the

Z\gamma

and

\gamma\gamma

rates can be either enhanced or suppressed, and in optimal case, the enhancement factors can reach 1.2 and 2 respectively; (iii) In the NMSSM, the

Z\gamma

and

\gamma\gamma

signal rates normalized by their SM predictions are strongly correlated, and vary from 0.2 to 2; (iv) In the nMSSM, the

Z\gamma

and

\gamma\gamma

rates are greatly reduced. Since the correlation behavior between the Z\gamma signal and the \gamma\gamma signal is so model-dependent, it may be used to distinguish the models in future experiments.

Note:

28 pages, 6 figures

12.60.Jv
14.80.Da
14.80.Ly
supersymmetry
phenomenology
Higgs particle
photon photon
luminosity: high
minimal supersymmetric standard model: parameter space
CERN LHC Coll

References(157)

Figures(6)

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