Extracting Weak Phase Information from B -> V_1 V_2 Decays

Details Extracting Weak Phase Information from B -> V_1 V_2 Decays Extracting Weak Phase Information from B -> V_1 V_2 Decays

2001-04-17

arxiv.org/abs/hep-ph/0104157v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, LaTeX, 1 figure. Uses two-column style file ltwol.sty. To be published in the Proceedings of the Fourth International

Scientific paper

We describe a new method for extracting weak, CP-violating phase information, with no hadronic uncertainties, from an angular analysis of B -> V_1 V_2 decays, where V_1 and V_2 are vector mesons. The quantity $\sin^2 (2 \phi_1 + \phi_3)$ (\phi_1=\beta and \phi_3=\gamma) can be cleanly obtained from the study of decays such as B_d^0(t) -> D^{*\pm} \rho^\mp, D^{*\pm} a_1^{\mp}, D^{*0} K^{*0}, etc. Similarly, one can use B_s^0(t) -> D_s^{*\pm} K^{*\mp} or even B\pm -> D^{*0}K^*\pm to extract $\sin^2 \phi_3$. There are no penguin contributions to these decays. It is possible that $\sin^2 (2\phi_1 + \phi_3)$ will be the second function of CP phases, after $\sin 2\phi_1$, to be measured at B-factories.

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