Improving bounds on γ in B±→DK± and B±,0→DXs±,0

Abstract

In view of recent experimental progress in rate and CP asymmetry measurements in B ± → DK ± , we reconsider information on the weak phase γ which can be obtained from these processes. Model-independent inequalities are proven for sin 2 γ in terms of two ratios of partial rates for B ±,0 → DX ±,0 s , where X s is any multiparticle charmless state carrying strangeness ±1. Good prospects are shown to exist for using these inequalities and CP asymmetry measurements in two body and multibody decays in order to improve present bounds on γ.

Dalitz plot analysis ofBs0→D¯0Aaij1, Adeva2, Adinolfi3 et al. 2014Phys. Rev. D1125580View full textAdd to dashboardCite

“…The results are important not only from the point of view of spectroscopy, but also as they will provide input to future studies of CP violation. In particular, the angle γ of the Cabibbo-Kobayashi-Maskawa unitarity triangle [41,42] can be determined from studies of CP violation in B 0 →D 0 K þ π − decays [43][44][45]. In such analyses, B 0 s decays provide both an important control channel and a potential source of background (see, e.g., Refs.…”

Measurement ofCPviolation parameters inB0→DK*0decays

“…They are treated following Ref. [9], with the use of a coherence factor, κ, in addition to the hadronic parameters r B and δ B , defined as κ≡ R jA cb ðpÞA ub ðpÞje iδðpÞ dp ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi ffi R jA ub ðpÞj 2 dp R jA cb ðpÞj 2 dp…”

Improved measurement of the CKM angleγinB∓→D(*)K(Aubert1, Bóna2, Karyotakis3 et al. 2008Phys. Rev. D853600View full textAdd to dashboardCite

“…The uncertainty in γ scales roughly as 1/r ( * ) B . From the ratio of CKM matrix elements we expect r ( * ) B ≈ c F | V cs V * ub | / | V us V * cb | to be approximately in the range 0.1−0.2, where c F ∼ 0.2−0.4 is the color suppression factor [10,11].…”