CP and charge asymmetries at CDF

CP Violation at CDF

Measurement of Cp Asymmetries at Belle

The Belle experiment at the KEK B factory has collected 93 fb of electron positron collisions at √ s = 10.6 GeV. This has produced a sample of 85 million BB̄ meson pairs that can be used to study CP violation in rare (and not so rare) B decay modes. Here I report on a measurement of indirect CP violation in the decay B → J/ψK S, as well as time dependent CP asymmetries in rarer modes such as B →...

Measurements of direct CP - violating asymmetries in charmless decays of bottom baryons CDF

We report final measurements of direct CP–violating asymmetries in charmless decays of neutral bottom hadrons to pairs of charged hadrons with the upgraded Collider Detector at the Fermilab Tevatron. Using the complete √ s = 1.96 TeV proton-antiproton collisions data set, corresponding to 9.3 fb−1 of integrated luminosity, we measure A(Λb → pπ−) = +0.06 ± 0.07(stat) ± 0.03(syst) and A(Λb → pK−)...

Time-Integrated Charge Asymmetries at DØ

Using dimuon pairs has an advantage over single muon events because the dimuon events are relatively clean. To first order there is no charge asymmetry in dimuon background processes. This analysis uses approximately 1 fb of data collected during Fermilab RunII collider operations. This resulted in approximately 3 million dimuon events. Sources of background dimuon events include cosmic rays, c...

Time-dependent CP asymmetries in Bs decays at LHCb

The LHCb experiment will search for New Physics in Bs mixing. The Bs mixing phase will be extracted from the measurement of the time-dependent CP asymmetry in exclusive Bs decays governed by the b → cc̄s quark-level transition. Large New Physics effects can be discovered or excluded with the data collected during the very first physics run of LHC. Based on Monte Carlo simulations of the LHCb det...