• Weak decay constants of light and heavy pseudoscalar mesons

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      https://www.ias.ac.in/article/fulltext/pram/048/05/0985-0995

    • Keywords

       

      Pseudoscalar mesons; quark model; decay constants; static approximation

    • Abstract

       

      We investigate the weak leptonic decays of light and heavy pseudoscalar mesons in a relativistic quark model of independent quarks. We perform a static calculation of the decay constantfM purely on grounds of simplicity. In order to minimize the possible uncertainty in the static calculation, we estimate the ratios of the decay constants which are found to be in good agreement, in the heavy flavor sector, with the predictions of other models available in the literature and existing experimental data. However, there is a noticeable discrepancy in the current prediction for pion decay constant which demonstrates the inherent limitations of the static approximation in the study of non-strange light mesons.

    • Author Affiliations

       

      N Barik1 S Kar1 2 P C Dash1 2

      1. Physics Department, Utkal University, Bhubaneswar - 751 004, India
      2. Physics Department, Prananath College, Khurda - 752 057, India
    • Dates

       
  • Pramana – Journal of Physics | News

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      Posted on July 25, 2019

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