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Physical Review D 85 (2012) 093017
Could a light Higgs boson illuminate the dark sector?
J.F. Kamenik1, 2, C. Smith3

The impact a new neutral light particle of spin 0, 1/2, 1, or 3/2 could have on the tiny width of a light Higgs boson is systematically analyzed. To this end, we include all the relevant effective interactions, whether renormalizable or not, and review the possible signatures in the Higgs decay modes with missing energy. This includes the fully invisible Higgs boson decay, as well as modes with SM gauge boson or fermions in the final state. In many cases, simply preventing these modes from being dominant suffices to set tight model-independent constraints on the masses and couplings of the new light states.
1 :  J. Stefan Institute
2 :  Department of Physics
3 :  IPNL - Institut de Physique Nucléaire de Lyon
Physique/Physique des Hautes Energies - Phénoménologie
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