The Φ0 → γZ decay in the Littlest Higgs Model
The existence of new particles with masses of the order of TeV's is a characteristic of several extended models. We study a heavy scalar particle decaying into γZ final states at the one-loop level in the Littlest Higgs Model. This process is analyzed in the context of the recent results reported by ATLAS and CMS Collaborations, concerning the observation of a resonance around 750 GeV. We analyze our results in a scenario where the energy scale f ranges from 2 TeV to 5 TeV. We found that the branching ratio for the Φ0 → γZ decay is of the order of 10-7, which mainly depends on a single parameter.
Let q be a positive integer, and L(s, χ ) the Dirichlet L -function corresponding to a Dirichlet character χ mod q . We put where χ runs over all Dirichlet characters mod q except for the principal character χ 0 .