6 Measurements of the Ckm Angle Β / Φ 1 at the B Factories
نویسنده
چکیده
We report measurements of time-dependent CP asymmetries related to the CKM angle β/φ1, using decays of neutral B mesons to charmonium, open charm and in b → s loop-dominated processes. A preliminary measurement of time-dependent CP asymmetries in B 0 → ρ 0 (770)K 0 S decays from the BABAR experiment is given here.
منابع مشابه
Measurements of the angle α ( φ 2 ) at B factories
into play the two elements of the CKM matrix which are non real at lowest order: Vub, involved in decays proceeding via a b to u transtion, whose phase is −γ, and Vtd, involved in B B̄ mixing, whose phase is −β. So α = π− β− γ can be measured from CP violating asymmetries in the interference between mixing and decay in charmless decays of the neutral B mesons, such as B → ππ, B → ρρ, B → πππ, an...
متن کاملMeasurements Related to the CKM Angle β / φ 1 from B
We present measurements related to the CKM angle β from BABAR based on 82 or ∼ 115 fb −1 data samples collected at the PEP-II e + e − asymmetric B Factory collider. A new method allowing to measure the sign of cos2β with B 0 → J/ψ " K * 0 " events is explained and related results reported.
متن کاملar X iv : h ep - e x / 05 11 01 6 v 1 4 N ov 2 00 5 SLAC - PUB - 11557 Measurements of the CKM Angle β
In this article I report on new and updated measurements of the CP-violating parameter β (φ1), which is related to the phase of the Cabibbo-Kobayashi-Maskawa (CKM) quark-mixing matrix of the electroweak interaction. Over the past few years, β has become the most precisely known parameter of the CKM unitarity triangle that governs the B system. The results presented here were produced by the two...
متن کاملMeasurements of sin 2 α / φ 2 from B → ππ , ρπ and ρρ modes
This is a summary of the experimental constraint on α obtained by the B-factories from B meson decays involving b → u transitions. The final states of interest for these studies are B → hh, where h = ρ, π. CP Violation (CPV) in the Standard Model of particle physics (SM) is described by a single complex phase. Interference between direct decay and decay after B-B mixing results in a time-depend...
متن کاملMeasurements of the CKM angle β in charmless loop - dominated B meson decays at B
Measurements of the CKM angle β in charmless loop-dominated B meson decays at BABAR Abstract We report on preliminary measurements of time-dependent CP-violation asymmetries in charmless neutral B meson decays to K +
متن کامل