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Título

Chiral extrapolation of the strangeness changing scalar K pi form factor

AutorPassemar, Emilie ; Bernard, Veronique
Palabras claveLattice QCD
Chiral Lagrangians
Fecha de publicación6-abr-2010
EditorSpringer
CitaciónJournal of High Energy Physics (4): 001 (2010)
ResumenWe perform a chiral extrapolation of lattice data on the scalar K pi form factor and the ratio of the kaon and pion decay constants within Chiral Perturbation Theory to two loops. We determine the value of the scalar form factor at zero momentum transfer, at the Callan-Treiman point and at its soft kaon analog as well as its slope. Results are in good agreement with their determination from experiment using the standard couplings of quarks to the W boson. The slope is however rather large. A study of the convergence of the chiral expansion is also performed.
Versión del editorhttp://dx.doi.org/ 10.1007/JHEP04(2010)001
URIhttp://hdl.handle.net/10261/24555
DOI10.1007/JHEP04(2010)001
ISSN1126-6708
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