Kinematic Edges with Flavor Oscillation and Non-Zero Widths

Abstract

Kinematic edges in cascade decays provide a probe of the masses of new particles. In some new physics scenarios the decay chain involves intermediate particles of different flavors that can mix and oscillate. We discuss the implication of such oscillation, and in particular its interplay with the non-zero widths of the particles. We derive explicit formulae for differential decay rates involving both non-zero widths and oscillation, and show that in the case where the mass difference between the intermediate particle is of the order of their widths, both oscillation and width effects are important. An examination of the physical observables contained in these differential decay rates is provided. We calculate differential decay rates for cases in which the intermediate particles are either scalars or fermions.

28 pages, 6 figures

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Cited by in corpus (6)

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• How to prove that the LHC did not discover dark matter
• Measuring the mass, width, and couplings of semi-invisible resonances with the Matrix Element Method
• Flavor and LHC Searches for New Physics