Decay Constants of Pseudoscalar Mesons

Publication Issue: 
Volume 34, Issue 1, 2013
Page No: 
Date Received: 
Thursday, March 7, 2013
Authors' Name: 
Swee Ping Chia
Authors' Affiliation and Address: 
Physics Department, University of Malaya, 50603 Kuala Lumpur, Malaysia
For purely leptonic decays of pseudoscalar mesons, the decay rates are related to the product of the relevant weak interaction-based CKM matrix element of the constituent quarks on the one hand, and the strong interaction parameter, the decay constant, which is related to the overlap of the quark and antiquark in the meson on the other hand. The decay constants for these mesons can thus be estimated from the decay rates of the respective dominant decay modes. The decay constants obtained are used to estimate the decay rates of the less dominant modes, which are in good agreement with experimentally measured values. We also predict the decay rates for τ-lepton.