English

Unparticle-Induced Lepton Flavor Violating Decays \tau^- ->l^- (V^0, ~P^0)

High Energy Physics - Phenomenology 2009-06-19 v2

Abstract

We make an evaluation of the lepton flavor violating (LFV) decays τ(V0,P0)\tau \to \ell (V^0, P^0), where =e\ell=e or μ\mu and V0(P0)V^0(P^0) is a neutral vector (pseudo-scalar) meson, in the context of unparticle physics. The constraints are investigated systematically on the related coupling parameters from all the available experimental data, and the parameter values are specified appropriately. The results show that whereas over the whole parameter space allowed by experiments all the τP0\tau \to \ell P^0 modes have a branching ratio too small to be measurable experimentally, in a large subspace as observed all of the τV0\tau \to \ell V^0 modes get simultaneously a branching ratio as high as O(1010108){\cal O}(10^{-10}-10^{-8}), which is reachable at the LHC and super B factory. The important implications are drawn.

Keywords

Cite

@article{arxiv.0901.3266,
  title  = {Unparticle-Induced Lepton Flavor Violating Decays \tau^- ->l^- (V^0, ~P^0)},
  author = {Zuo-Hong Li and Ying Li and Hong-Xia Xu},
  journal= {arXiv preprint arXiv:0901.3266},
  year   = {2009}
}

Comments

18 pages, 3 figures, Version appeared in PLB with many new discussions and more references