The pion form factor from analyticity and unitarity

Pramana

B Ananthanarayan²  Irinel Caprini¹  I Sentitemsu Imsong1² 

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

关键词: Unitarity;    analyticity;    zeros.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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 𝜋 𝜋 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.

【 授权许可】

Unknown