Phenomenological aspects of a Fermiophobic SU(2)xSU(2)xU(1) extension of the Standard Model

Abstract

We consider an extension of the standard electroweak theory with gauge group $SU(2{)}_L\times SU(2{)}_R\times U(1{)}_{\tilde{Y}}$, where the gauge bosons of the extra $SU(2{)}_R$ factor do not couple to ordinary fermions. We show that precision electroweak data and flavour physics provide quite stringent indirect constraints on its parameter space, but still allow for relatively light non-standard gauge and Higgs bosons. We then consider the model phenomenology at high-energy colliders, and observe that in the gauge boson sector present bounds and possible future signals are dominated by $Z^{\prime }$ production. In summary, indirect constraints on the charged gauge boson sector are so tight that observable new effects must be connected either with the neutral gauge boson sector or with the extended Higgs sector of the model.

arXiv comment43 pages, 7 figures, plain LaTeX, epsfig

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• A Higgs or Not a Higgs? What to Do if You Discover a New Scalar Particle
• A consistent model for leptogenesis, dark matter and the IceCube signal
• New Physics in the Third Family and its Effect on Low Energy Data
• Fermiophobic light Higgs boson in the type-I two-Higgs-doublet model
• Complementary bound on $W^{\prime }$ mass from Higgs to diphoton decay
• Diboson excess and $Z^{\prime }$-predictions via left-right non-linear Higgs
• Low-energy photon-neutrino inelastic processes beyond the Standard Model
• Impact of B physics on model building and vice versa: an example
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