Kπ+ form factor in the large-Nc and cutoff regularization method

Estefania Coluccio Leskow, Giancarlo D’Ambrosio, David Greynat, and Atanu Nath
Phys. Rev. D 93, 094031 – Published 26 May 2016

Abstract

In a series of papers, Bardeen, Buras and Gérard have proposed a large-Nc method to evaluate hadronic weak matrix elements to attack, for instance, the determination of the ΔI=1/2 rule and Re(ε/ε). Here we test this method to the determination of the form factor parameters a+ and b+ in the decays K+π++ and KSπ0+. The results are encouraging, in particular after a complete treatment of vector meson dominance.

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  • Received 19 April 2016

DOI:https://doi.org/10.1103/PhysRevD.93.094031

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

Estefania Coluccio Leskow1,*, Giancarlo D’Ambrosio1,†, David Greynat1,2,‡, and Atanu Nath2,§

  • 1INFN-Sezione di Napoli, Via Cintia, 80126 Napoli, Italia
  • 2Dip. di Scienze Fisiche, Universitá di Napoli “Federico II”, Via Cintia, 80126 Napoli, Italia

  • *coluccio@na.infn.it
  • gdambros@na.infn.it
  • greynat@na.infn.it
  • §nath@na.infn.it

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Issue

Vol. 93, Iss. 9 — 1 May 2016

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