20–27 juil. 2011
Alpes Congrès - Alpexpo
Fuseau horaire Europe/Paris

Other B decays at Belle

22 juil. 2011, 15:15
15m
les Ecrins 3 (Alpes Congrès - Alpexpo)

les Ecrins 3

Alpes Congrès - Alpexpo

Parallel session talk Flavour Physics and Fundamental Symmetries Flavour Physics and Fundamental Symmetries

Orateur

Dr Min-Zu Wang (NTU, Taipei)

Description

We report measurements of branching fractions and CP violation asymmetries for BϕϕK decays. Results of the study of B±J/ψK± and B±ηCK±, that result in a final state of five kaons, will also be presented. We study the B meson decays to the final state of pΛD0. The decay BpΛD0 is observed for the first time, with the invariant mass of the pΛ system peaking near threshold. Furthermore, we set an upper limit on decay branching fraction of BpΛD0 in absence of a statistically significant signal. We report a study of the exclusive B meson decays to the final states DsKS0π and DsKK. We use Dsϕπ, K¯(892)0K and KS0K decay modes for the Ds reconstruction. The HyperCP experiment at Fermilab reported the observation of three events for Σpμ+μ decay. The dimuon masses of the observed events are clustered within detector resolution of 1 MeV/c2, around 214.3 MeV/c2. These decays might be interpreted as a two-body decay, Σ+pX0(214), X0(214)μ+μ. Several theoretical papers interpret the X0(214) as a sgoldstino in SUSY model, a light Higgs boson in NMSSM model, or an U-boson. We report on a search for the X0 particle in B0 to K+(π+)πX0 decays. We extend the search to a mass region from 212 MeV/c2 to 500 MeV/c2 with several different X0 lifetime assumptions. We measured the branching fraction of the decay B0J/ψη() based. The branching fraction results were used to constrain the η-η mixing angle. These analyses are performed using the large data sample collected with the Belle detector near the Υ(4S) resonance at the KEKB asymmetric e+e collider.

Auteur principal

Dr Min-Zu Wang (NTU, Taipei)

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