The 9th Joint International Hadron Structure '15 Conference, Horný Smokovec, Slovak Republic, 29 June–3 July 2015; Editors: Stanislav Dubnička, Anna Zuzana Dubničková and Erik BartošOpen Access

Pion polarizabilities: Theory vs Experiment

M. A. Ivanov

M. A. Ivanov

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, 141980 Dubna (Moscow region), Russia

E-mail Address: ivanovm@theor.jinr.ru

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https://doi.org/10.1142/S2010194515601040Cited by:3 (Source: Crossref)

Abstract

The values of charged pion polarizabilities obtained in the framework of chiral perturbation theory at the level of two-loop accuracy are compared with the experimental result recently reported by COMPASS Collaboration. It is found that calculated value for the dipole polarizabilities ${(α - β)}_{π^{\pm}} = (5.7 \pm 1.0) \times 1 0^{- 4} {fm}^{3}$ ${(α - β)}_{π^{\pm}} = (5.7 \pm 1.0) \times 1 0^{- 4} {fm}^{3}$ fits quite well the experimental result ${(α - β)}_{π^{\pm}} = (4.0 \pm 1 . 2_{stat} \pm 1 . 4_{syst}) \times 1 0^{- 4} {fm}^{3}$ ${(α - β)}_{π^{\pm}} = (4.0 \pm 1 . 2_{stat} \pm 1 . 4_{syst}) \times 1 0^{- 4} {fm}^{3}$ .

Keywords:

PACS: 11.30.Rd, 12.38.Aw, 12.39.Fe

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Published: 26 November 2015

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This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 3.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited.

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Pion polarizabilities: Theory vs Experiment

Abstract

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