Implications of a modified Higgs to diphoton decay width
By M. Carena, I. Low, C. Wagner. 2012
272 citations recorded by the source corpus.
A bstractMotivated by recent results from Higgs searches at the Large Hadron Collider, we consider possibilities to enhance the diphoton decay width of the Higgs boson over the Standard Model expectation, without modifying either its production rate or the partial widths in the WW and ZZ channels. Studying effects of new charged scalars, fermions and vector bosons, we find that significant variations in the diphoton width may be possible if the new particles have light masses of the order of a few hundred GeV and sizeable couplings to the Higgs boson. Such couplings could arise naturally if there is large mass mixing between two charged particles that is induced by the Higgs vacuum expectation value. In addition, there is generically also a shift in the Zγ partial width, which in the case of new vector bosons tends to be of similar magnitude as the shift in the diphoton partial width, but smaller in other cases. Therefore simultaneous measurements in these two channels could reveal properties of new charged particles at the electroweak scale.
Subfields: Artificial Intelligence, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/b4f95929c08c94250faea1594f751ac36a282087
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In Artificial Intelligence
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- Stefan Dittmaier
- Sven Heinemeyer
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In Nuclear and High Energy Physics
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Citations in the corpus
- Search for a Higgs boson decaying into a Z and a photon in pp collisions at $s$ = 7 and 8 TeV (2013, background): “ΓZγ is sensitive to physics beyond the SM, and could be substantially modified by new charged particles without affecting the gluon–gluon fusion Higgs boson production cross section [9], such as derived from an extended Higgs sector [10], or by the presence of new scalars [11,12].”
- Vector-like leptons: Higgs decays and collider phenomenology (2013, methodology): “Neglecting the mixing between the chiral and vector-like states, F γγ H is dominated by heavy fermion loops and can be written by means of the Higgs low energy theorem as [45]”
- Physics of leptoquarks in precision experiments and at particle colliders (2016, methodology): “The partial decay width for h→ Zγ in the presence of a scalar LQ representation S is given by [263]”
- Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, background): “– The light stau scenario: It has been shown that light staus, in the presence of large mi xing, may lead to important modifications of the di-photon decay width of the lightest CP-even Higgs boson, Γ(h → γγ) [321, 334, 338,365,661,662,678,679].”
- ILC Higgs White Paper (2013, background): “Effects of unparticles were studied recently for two photon collisions [40].”