Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-08-11
Nucl.Phys.B563:21-44,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
30 pages, LaTeX, 12 figures, 3 tables
Scientific paper
10.1016/S0550-3213(99)00599-4
In a realistic theory with large extra dimensions and TeV scale gravity, there are often other particles living in the extra dimensions in addition to gravitons. A well motivated candidate is the flavon in a flavor theory which explains the smallness of the fermion masses by the large volume of the extra dimensions. The flavon interactions involve the Higgs field and can therefore give rise to new mechanisms of Higgs boson production. We study these new Higgs signals, including both real flavon emission and virtual flavon exchange. They could provide powerful probes of the string scale which are comparable to the extensively studied graviton production, if the flavons and the graviton feel the same number of extra dimensions. If the flavons only live in a subspace of the extra dimensions, they can yield even stronger bounds and may generate spectacular displaced vertex signals. Our study also applies to a four dimensional flavor theory with light flavons as well as to any theory with bulk scalar fields coupled to the Higgs and fermions.
Cheng Hsin-Chia
Matchev Konstantin T.
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