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Order p(6) chiral couplings from the scalar K pi form factor
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Order p(6) chiral couplings from the scalar K pi form factor
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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 | 2015-02-27T09:52:45Z | |
| dc.date.available | 2015-02-27T09:52:45Z | |
| dc.date.issued | 2004 | |
| dc.identifier.citation | Jamin, Matthias Oller Berber, José Antonio Pich Zardoya, Antonio 2004 Order p(6) chiral couplings from the scalar K pi form factor Journal of High Energy Physics 2004 2 047-1 047-14 | |
| dc.identifier.uri | http://hdl.handle.net/10550/42489 | |
| dc.description.abstract | Employing results from a recent determination of the scalar Kpi form factor F-0(Kpi) within a coupled channel dispersion relation analysis [1], in this work we calculate the slope and curvature of F-0(Kpi)(t) at zero momentum transfer. Knowledge of the slope and curvature of the scalar Kpi form factor, together with a recently calculated expression for F-0(Kpi)(t) in chiral perturbation theory at order p(6), enable to estimate the O(p(6)) chiral constants C-12(r) (M-rho) = (0.3 +/- 5.4) . 10(-7) and (C-12(r) + C-34(r)) (M-rho) = (3.2 +/- 1.5) . 10(-6). Our findings also allow to estimate the contribution coming from the C-i to the vector form factor F-+(Kpi)(0) which is a crucial ingredient for a precise determination of \V-us\ from K-l3 decays. Our result F-+(Kpi)(0)\C-i(r) = -0.018 +/- 0.009, though inflicted with large uncertainties, is in perfect agreement with a previous estimate by Leutwyler and Roos already made twenty years ago. | |
| dc.language.iso | eng | |
| dc.relation.ispartof | Journal of High Energy Physics, 2004, vol. 2004, num. 2, p. 047-1-047-14 | |
| dc.subject | Física | |
| dc.title | Order p(6) chiral couplings from the scalar K pi form factor | |
| dc.type | journal article | es_ES |
| dc.date.updated | 2015-02-27T09:52:45Z | |
| dc.identifier.doi | 10.1088/1126-6708/2004/02/047 | |
| dc.identifier.idgrec | 016632 | |
| dc.rights.accessRights | open access | es_ES |
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