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The < SPP > Green function and SU(3) breaking in Kl3 decays

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The < SPP > Green function and SU(3) breaking in Kl3 decays

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dc.contributor.author	Cirigliano, Vincenzo
dc.contributor.author	Ecker, Gerhard
dc.contributor.author	Eidemüller, Markus
dc.contributor.author	Kaiser, Roland
dc.contributor.author	Pich Zardoya, Antonio
dc.contributor.author	Portolés Ibáñez, Jorge
dc.date.accessioned	2015-02-27T10:23:51Z
dc.date.available	2015-02-27T10:23:51Z
dc.date.issued	2005
dc.identifier.citation	Cirigliano, Vincenzo Ecker, Gerhard Eidemüller, Markus Kaiser, Roland Pich Zardoya, Antonio Portolés Ibáñez, Jorge 2005 The < SPP > Green function and SU(3) breaking in Kl3 decays Journal of High Energy Physics 2005 4 006-1 006-18
dc.identifier.uri	http://hdl.handle.net/10550/42493
dc.description.abstract	Using the 1=/N-C expansion scheme and truncating the hadronic spectrum to the lowest-lying resonances, we match a meromorphic approximation to the < SPP > Green function onto QCD by imposing the correct large-momentum falloff, both off- shell and on the relevant hadron mass shells. In this way we determine a number of chiral low-energy constants of O(p(6)), in particular the ones governing SU(3) breaking in the K-l3 vector form factor at zero momentum transfer. The main result of our matching procedure is that the known loop contributions largely dominate the corrections of O(p(6)) to f(+)(0). We discuss the implications of our final value f(+)(K0 pi-) (0) = 0.984 +/- 0.012 for the extraction of V-us from K-l3 decays.
dc.language.iso	eng
dc.relation.ispartof	Journal of High Energy Physics, 2005, vol. 2005, num. 4, p. 006-1-006-18
dc.subject	Física
dc.title	The < SPP > Green function and SU(3) breaking in Kl3 decays
dc.type	journal article	es_ES
dc.date.updated	2015-02-27T10:23:51Z
dc.identifier.doi	10.1088/1126-6708/2005/04/006
dc.identifier.idgrec	030916
dc.rights.accessRights	open access	es_ES