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JOURNALS // Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki // Archive

Pis'ma v Zh. Èksper. Teoret. Fiz., 2012 Volume 96, Issue 9, Pages 627–631 (Mi jetpl3268)

This article is cited in 6 papers

FIELDS, PARTICLES, AND NUCLEI

Pion form factor in the range $-10\leq s\leq1$ GeV$^2$

N. N. Achasova, A. A. Kozhevnikovb

a Sobolev Institute of Mathematics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk
b Novosibirsk State University

Abstract: Based on the field-theory-inspired approach, a new expression for the pion form factor $F_\pi$ is proposed. It takes into account the pseudoscalar meson loops $\pi^+\pi^-$ and $K\bar K$ and the mixing of $\rho(770)$ with heavier $\rho(1450)$ and $\rho(1700)$ resonances. The expression possesses correct analytical properties and describes the data in the wide range of the energy squared $-10\leq s\leq1$ GeV$^2$ without introducing the phenomenological Blatt–Weisskopf range parameter $R_\pi$.

Received: 25.09.2012

Language: English


 English version:
Journal of Experimental and Theoretical Physics Letters, 2012, 96:9, 559–563

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