NAGIOS: RODERIC FUNCIONANDO

Can one detect new physics in I=0 and/or I=2 contributions to the decays B ->pi pi

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/

Can one detect new physics in I=0 and/or I=2 contributions to the decays B ->pi pi

Mostra el registre complet de l'element

Visualització (170.1Kb)

Baek, Seungwon; Botella Olcina, Francisco J.; London, David; Silva, Joao P.

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

We study the effects of new-physics contributions to B --> pi pi decays, which can be parametrized as four new complex quantities. A simple analysis is provided by utilizing the reparametrization invariance of the decay amplitudes. We find that six quantities can be reabsorbed into the definitions of Standard Model-like parameters. As a result, the usual isospin analysis provides only two constraints on new physics which are independent of estimates for the Standard Model contributions. In particular, we show that one is not sensitive to new physics affecting the I=0 amplitudes. On the other hand, I=2 new physics can be detected, and its parameters can be measured by using independent determinations of the weak phases. We obtain constraints on these new-physics parameters through a fit to the current experimental data.

Veure al catàleg Trobes