244 research outputs found
Discrimination of models including doubly charged scalar bosons by using tau lepton decay distributions
The doubly charged scalar boson (H^{\pm\pm}) is introduced in several models
of the new physics beyond the standard model. The H^{\pm\pm} has Yukawa
interactions with two left-handed charged leptons or two right-handed charged
leptons depending on the models. We study kinematical properties of H^{\pm\pm}
decay products through tau leptons in order to discriminate the chiral
structures of the new Yukawa interaction. The chirality of tau leptons can be
measured by the energy distributions of the tau decay products, and thus the
chiral structure of the new Yukawa interaction can be traced in the
invariant-mass distributions of the H^{\pm\pm} decay products. We perform
simulation studies for the typical decay patterns of the H^{\pm\pm} with simple
event selections and tau-tagging procedures, and show that the chiral structure
of the Yukawa interactions of H^{\pm\pm} can be distinguished by measuring the
invariant-mass distributions.Comment: 13 pages, 8 eps files; published in Physics Letter
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