Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2005-02-14
Nucl.Phys.B725:155-172,2005
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages, 15 figures. Revised version, analyses extended to more general New Physics; C.L. of exclusion of a real CKM matrix i
Scientific paper
10.1016/j.nuclphysb.2005.07.006
We carefully analyse the present experimental evidence for a complex CKM matrix, even allowing for New Physics contributions to $\epsilon_{K}$, $a_{J/\Psi K_S}$, $\Delta M_{B_{d}}$, $\Delta M_{B_{s}}$, and the $\Delta I=1/2$ piece of $B\to\rho\rho$ and $B\to\rho\pi$. We emphasize the crucial r\^ ole played by the angle $\gamma$ in both providing irrefutable evidence for a complex CKM matrix and placing constraints on the size of NP contributions. It is shown that even if one allows for New Physics a real CKM matrix is excluded at a 99.92% C.L., and the probability for the phase $\gamma$ to be in the interval $[-170^\circ;-10^\circ]\cup [10^\circ;170^\circ]$ is 99.7%.
Botella Francisco J.
Branco Gustavo C.
Nebot Miguel
Rebelo M. N.
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