A scrutiny of hard pion chiral perturbation theory

Colangelo, Gilberto; Procura, Massimiliano; Rothen, Lorena; Stucki, Ramon; Tarrús Castellà, J. (2013). A scrutiny of hard pion chiral perturbation theory. PoS - proceedings of science, CD12, 049. Scuola Internazionale Superiore di Studi Avanzati SISSA

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In the recently proposed framework of hard pion chiral perturbation theory, the leading chiral logarithms are predicted to factorize with respect to the energy dependence in the chiral limit. We have scrutinized this assumption in the case of vector and scalar pion form factors FV;S(s) by means of standard chiral perturbation theory and dispersion relations. We show that this factorization property is valid for the elastic contribution to the dispersion integrals for FV;S(s) but it is violated starting at three loops when the inelastic four-pion contributions arise.

Item Type:

Conference or Workshop Item (Paper)

Division/Institute:

08 Faculty of Science > Institute of Theoretical Physics
10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)

UniBE Contributor:

Colangelo, Gilberto; Procura, Massimiliano; Rothen, Lorena and Stucki, Ramon

Subjects:

500 Science > 530 Physics

ISSN:

1824-8039

Publisher:

Scuola Internazionale Superiore di Studi Avanzati SISSA

Language:

English

Submitter:

Esther Fiechter

Date Deposited:

18 Jun 2014 14:55

Last Modified:

16 Dec 2014 20:02

BORIS DOI:

10.7892/boris.42538

URI:

https://boris.unibe.ch/id/eprint/42538

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