Quark-Lepton Unification and Rare Meson Decays

Abstract

We study meson decays mediated by the heavy gauge bosons of the Pati-Salam model of quark-lepton unification. We consider the scenarios in which the tau lepton is associated with the third, second, and first generation of quarks. The most sensitive probes, depending on the scenario, are rare K, pi, and B decays.

18 pages, ILL-(TH)-94-17 (to appear in Phys. Rev. D). Latex. One figure available upon request

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• All possible first signals of gauge leptoquark in quark-lepton unification and beyond
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• Tau lepton charge asymmetry and new physics at the LHC
• Chiral gauge leptoquark mass limits and branching ratios of $K_L^0,B^0,B_s\to l_i^{+}{l}_j^{-}$ decays with account of the general fermion mixing in leptoquark currents
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