• Constraints on the $K_{l_{3}}$ form factors from analyticity and unitarity

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/079/04/0891-0894

• # Keywords

Unitarity; analyticity; zeros.

• # Abstract

The $K \phi$ form factors are investigated at low energies by the method of unitarity bounds adapted so as to include information on the phase and modulus along the elastic region of the unitarity cut. Using as input the values of the form factors at $t = 0$, and at the Callan–Treiman point in the scalar case, stringent constraints are obtained on the slope and curvature parameters of the Taylor expansion at the origin.

• # Author Affiliations

1. Centre for High Energy Physics, Indian Institute of Science, Bangalore 560 012, India
2. Horia Hulubei National Institute for Physics and Nuclear Engineering, P.O.B. MG-6, 077125 Magurele, Romania

• # Pramana – Journal of Physics

Volume 95, 2021
All articles
Continuous Article Publishing mode

• # Editorial Note on Continuous Article Publication

Posted on July 25, 2019