ar X iv : h ep - p h / 05 11 03 7 v 1 4 N ov 2 00 5 Rephasing Invariance and Hierarchy of the CKM Matrix

ar X iv : h ep - p h / 05 10 17 7 v 2 3 N ov 2 00 5 Hyperon Semileptonic Decays and CKM Unitarity ∗

We perform a new numerical analysis of hyperon semileptonic decays emphasizing the systematic uncertainties. The poor understanding of SU(3) symmetry breaking effects at second order in the vector form factor translates into a large error of |Vus|. Using our determination |Vus| = 0.226 ± 0.005 together with those coming from other sources we test the unitarity of the CKM matrix.

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

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 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 - t h / 05 11 16 1 v 1 1 6 N ov 2 00 5 The Effective Potential in the Massive φ 4 4 Model

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...