• The pion form factor from analyticity and unitarity

• # Fulltext

https://www.ias.ac.in/article/fulltext/pram/079/05/1317-1320

• # Keywords

Unitarity; analyticity; zeros.

• # Abstract

Analyticity and unitarity techniques are employed to estimate Taylor coefficients of the pion electromagnetic form factor at $t = 0$ by exploiting the recently evaluated two-pion contribution to the muon $(g − 2)$ and the phase of the pion electromagnetic form factor in the elastic region, known from $\pi \pi$ scattering by Fermi–Watson theorem and the values of the form factor at several points in the space-like region. Regions in the complex 𝑡-plane are isolated where the form factor cannot have zeros.

• # 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