On meson dominance in the `second class' tau \to eta pi nu_tau decay

Details On meson dominance in the `second class' tau \to eta pi nu_tau decay On meson dominance in the `second class' tau \to eta pi nu_tau decay

2010-05-21

arxiv.org/abs/1005.4001v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages

Scientific paper

Motivated by recent estimates of the isospin-violating process tau \to eta pi
nu_tau, mostly relying on the rho and a_0 dominance of the relevant form
factors near threshold, we present an assessment for the branching ratio that
accounts for additional, potential, effects from the lowest radial excitations
rho(1450) and a_0(1450), respectively, also lying in the decay phase space.

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