Original scientific paper

The η decay constant in 'resummed' chiral perturbation theory

Marián Kolesár ; Institute of Particle and Nuclear Physics, MFF UK, Prague, Czech Republic
Jirí Novotný ; Institute of Particle and Nuclear Physics, MFF UK, Prague, Czech Republic

Abstract

The recently developed ’resummed’ χPT is illustrated in the case of pseudoscalar meson decay constants. We try to get an estimate of the η decay constant, which is not well known from experiments, while using several ways, including the generalized χPT Lagrangian, to gather information beyond the standard next-to-leading order. We compare the results to published χPT predictions, our own standard χPT calculations and available phenomenological estimates.

Keywords

Hrčak ID:

304776

URI

https://hrcak.srce.hr/304776

Publication date:

2.3.2008.

Article data in other languages: croatian

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