Dark matter and Higgs phenomenology predicted by left-right twin Higgs model in light of CDMS II results

Abstract

The left-right twin Higgs model predicts a light stable scalar \hat{S}, which is a candidate for WIMP dark matter. We study its scattering on nucleon and find that the cross section is below the CDMS II upper bound but can reach the SuperCDMS sensitivity. Then we study the Higgs phenomenology by paying special attention to the decay h -> \hat{S} \hat{S} which is strongly correlated with the dark matter scattering on nucleon. We find that such an invisible decay can be sizable, which can severely suppress the conventional decay modes like h->VV (V=W,Z) and h->b\bar{b}. On the other hand, compared to the SM prediction, the rates of Higgs boson productions at the LHC via gluon-gluon fusion, weak boson fusion or in association with top quark pairs are all reduced significantly, e.g., the gluon-gluon fusion channel can be suppressed by about 30%.

Version in JHEP (discussions and refs added)

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Cited by in corpus (6)

• SUSY dark matter in light of CDMS II results: a comparative study for different models
• The production and decay of the top partner $T$ in the left-right twin higgs model at the ILC and CLIC
• Pair production of Higgs bosons associated with $Z$ boson in the left-right twin Higgs model at the ILC
• Higgs boson decays and production in the left-right twin Higgs model
• Single Higgs boson production at the ILC in the left-right twin Higgs model
• Constraining dark matter in the LRTH model with latest LHC, XENON100 and LUX data