| Domaine : |
 |
Physique/Physique des Hautes Energies - Phénoménologie
|
|
| Titre : |
|
Contributions of order O(M(QUARK)**2) K(LEPTON 3) form-factors and unitarity of the CKM matrix |
|
| Auteur(s) : |
|
Norman. H. Fuchs1, Marc Knecht2, Jan Stern3 |
|
| Laboratoire : |
|
|
|
| Résumé : |
|
The form factors for the K_{l 3} semileptonic decay are computed to order O(p^4) in generalized chiral perturbation theory. The main difference with the standard O(p^4) expressions consists in contributions quadratic in quark masses, which are described by a single divergence-free low-energy constant, A_3. A new simultaneous analysis is presented for the CKM matrix element V_{us}, the ratio F_K/F_{pi}, K_{l 3} decay rates and the scalar form factor slope lambda_0. This framework easily accommodates the precise value for $V_{ud}$ deduced from superallowed nuclear beta-decays. |
|
Langue du texte
intégral : |
|
Anglais |
|
Date de production,
écriture : |
|
18/01/2000 |
|
|
| Journal : |
|
| Physical Review D (Phys. Rev. D) |
| Publisher |
American Physical Society |
| ISSN |
1550-7998 (eISSN : 1550-2368) |
|
|
| Type de publication : |
|
Articles dans des revues avec comité de lecture |
|
| Date de publication : |
|
2000 |
|
| Volume : |
|
62 |
|
| Page, identifiant, ... : |
|
033003 |
|
|
| Référence interne : |
|
IPNO-DR 99-23, CPT-99/P.3915 |
|
|
Récupérer au format
