Branching ratio of the “second class” τηπντ decay

N. Paver and Riazuddin
Phys. Rev. D 84, 017302 – Published 19 July 2011

Abstract

We present an assessment of the standard model expectations for the branching ratio of the isotopic spin and G-parity violating decay τηπντ. This estimate is based on a vector and scalar meson dominance parametrization of the relevant form factors, that explicitly accounts for π0ηη mixing. The numerical results obtained in this framework indicate a branching ratio 1 order of magnitude (or more) below the current experimental limit and suggest the possibility of evidencing some novel interaction in high statistics studies of this decay.

  • Received 3 June 2011

DOI:https://doi.org/10.1103/PhysRevD.84.017302

© 2011 American Physical Society

Authors & Affiliations

N. Paver*

  • Department of Physics, University of Trieste, 34100 Trieste, Italy and INFN-Sezione di Trieste, 34100 Trieste, Italy

Riazuddin

  • National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan

  • *nello.paver@ts.infn.it
  • riazuddin@ncp.edu.pk

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Issue

Vol. 84, Iss. 1 — 1 July 2011

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