NAGIOS: RODERIC FUNCIONANDO

Reparametrization invariance of B decay amplitudes and implications for new physics searches in B decays

Repositori DSpace/Manakin

Valencià Castellano

Inici
Investigació
e-prints
22 - Física
Visualitza element

IMPORTANT: Aquest repositori està en una versió antiga des del 3/12/2023. La nova instal.lació está en https://roderic.uv.es/

Reparametrization invariance of B decay amplitudes and implications for new physics searches in B decays

Mostra el registre complet de l'element

Visualització (295.8Kb)

Botella Olcina, Francisco J.; Silva, Joao P.

Aquest document és un/a article, creat/da en: 2005

When studying B decays within the Standard Model, it is customary to use the unitarity of the CKM matrix in order to write the decay amplitudes in terms of only two of the three weak phases which appear in the various diagrams. Occasionally, it is mentioned that those two weak phases can be used in order to describe any decay amplitude, even beyond the Standard Model. Here we point out that, when describing a generic decay amplitude, the two weak phases can be chosen completely at will, and we study the behavior of the decay amplitudes under changes in the two weak phases chosen as a basis. Of course, physical observables cannot depend on such reparametrizations. This has an impact in discussions of the SM and in attempts to parametrize new physics effects in the decay amplitudes. We illustrate these issues by looking at B --> psi K_S and the isospin analysis in B --> pi pi.

Veure al catàleg Trobes