Scalar K pi form factor and light-quark masses
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Scalar K pi form factor and light-quark masses

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Scalar K pi form factor and light-quark masses

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dc.contributor.author Jamin, Matthias
dc.contributor.author Oller Berber, José Antonio
dc.contributor.author Pich Zardoya, Antonio
dc.date.accessioned 2015-02-27T10:37:36Z
dc.date.available 2015-02-27T10:37:36Z
dc.date.issued 2006
dc.identifier.uri http://hdl.handle.net/10550/42496
dc.description.abstract Recent experimental improvements on K-decay data allow for a precise extraction of the strangeness-changing scalar K pi form factor and the related strange scalar spectral function. On the basis of this scalar as well as the corresponding pseudoscalar spectral function, the strange quark mass is determined to be m(s)(2 GeV)=92 +/- 9 MeV. Further taking into account chiral perturbation theory mass ratios, the light up and down quark masses turn out to be m(u)(2 GeV)=2.7 +/- 0.4 MeV as well as m(d)(2 GeV)=4.8 +/- 0.5 MeV. As a by-product, we also find a value for the Cabibbo angle vertical bar V-us vertical bar=0.2236(29) and the ratio of meson decay constants F-K/F-pi=1.203(16). Performing a global average of the strange mass by including extractions from other channels as well as lattice QCD results yields m(s)(2 GeV)=94 +/- 6 MeV.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2006, vol. 74, num. 7, p. 074009-1-074009-5
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Jamin, Matthias Oller Berber, José Antonio Pich Zardoya, Antonio 2006 Scalar K pi form factor and light-quark masses Physical Review D 74 7 074009-1 074009-5
dc.subject Física
dc.title Scalar K pi form factor and light-quark masses
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-02-27T10:37:36Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.74.074009
dc.identifier.idgrec 036292

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