ar X iv : h ep - p h / 03 11 17 0 v 1 1 3 N ov 2 00 3 Learning the weak phase γ from B decays Jonathan

ar X iv : h ep - p h / 03 11 17 0 v 2 1 9 N ov 2 00 3 Learning the weak phase γ from B decays

The current status of some methods to determine the weak phase γ of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V ∗ ub using B decays is discussed, and comments are made on accuracy achievable in the next few years.

ar X iv : h ep - p h / 03 11 17 0 v 3 4 D ec 2 00 3 Learning the weak phase γ from B decays

The current status of some methods to determine the weak phase γ of the Cabibbo-Kobayashi-Maskawa (CKM) matrix element V ∗ ub using B decays is discussed, and comments are made on accuracy achievable in the next few years.

ar X iv : h ep - p h / 03 11 28 0 v 1 2 1 N ov 2 00 3 1 LEARNING γ FROM B →

Current information on γ = Arg(V ∗ ub) from other CKM constraints is still in need of improvement, with 39 < γ < 80 at 95% c.l. [1]. Direct probes of γ can tighten these bounds, possibly indicating new physics effects in case that an inconsistency with this range is observed. In order to study γ directly in charmless two-body B decays, which involve a b to u transition, one must generally separ...

ar X iv : h ep - p h / 05 03 26 3 v 2 3 N ov 2 00 5

The factorization properties of the radiative decays B → V γ are analyzed at leading order in 1/mb using the soft-collinear effective theory. It is shown that the decay amplitudes can be expressed in terms of a B → V form factor evaluated at q2 = 0, light-cone distribution amplitudes of the B and V mesons, and calculable hard-scattering kernels. The renormalization-group equations in the effect...

ar X iv : h ep - p h / 03 07 03 8 v 1 2 J ul 2 00 3 1 Scalar meson exchange in Φ → P 0 P 0 γ decays ∗