A New Kind of Scalar Particle
Abstract
The pattern of quantum numbers in the leptons and quarks indicate that precisely two fixed hypercharge splittings are observed in nature. The | Y|=1 splitting corresponds to the SU(2)L scalar and doublet spacing, indicative of the Yukawa interactions of the Higgs mechanism. A | Y|=4/3 splitting is identified between corresponding SU(3)C scalars and triplets. The properties of this splitting are the basis for the prediction of a new kind of scalar particle that directly couples quarks and leptons. Possible experimental methods for detecting a strongly interacting, charge -1e/3 scalar particle are presented for the examples of exotic decay modes of the top quark and the analysis of ttτ+τ- production at hadron colliders.
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