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Integrating out strange quarks in ChPT

AuthorsGasser, Jurg; Haefeli, Christoph; Ivanov, Mikhail A.; Schmid, Martin
KeywordsChiral symmetries
Chiral perturbation theory
Chiral Lagrangians
Quantum Chromodynamics (QCD)
[PACS] Formal properties of current algebras
Issue Date30-Jun-2007
CitationPhysics Letters B 652(1): 21-26 (2007)
AbstractWe study three-flavour chiral perturbation theory in a limit where the strange quark mass is much larger than the external momenta and the up and down quark masses, and where the external fields are those of two-flavour chiral perturbation theory. In this case, the theory reduces to the one of SU(2)(L) x SU(2)(R). Through this reduction, one can work out the strange quark mass dependence of the LECs in the two-flavour case. We present the pertinent relations at two-loop order for F, B and l(i).
Description6 pages, 2 figures.-- PACS nrs.: 11.30.Rd; 12.39.Fe; 11.40.Ex.-- ISI Article Identifier: 000249331300003.-- ArXiv pre-print available at: http://arxiv.org/abs/0706.0955
Printed version published on Aug 16, 2007.
Publisher version (URL)http://dx.doi.org/10.1016/j.physletb.2007.06.058
Appears in Collections:(IFIC) Artículos
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