Dr
Leonardo Vernazza
(Johannes Gutenberg Universität Mainz)
10/12/2010, 14:50
T, C, P, CP symmetries, Accidental symmetries (B, L conservation)
The large discrepancy between theory and experiment observed in $A_{\rm CP}(B^-\to\pi^0 K^-)-A_{\rm CP}(\bar{B}^0\to\pi^+ K^-)$ can be solved with the introduction of a new electroweak penguin amplitude. Motivated by this result, we analyze the $\bar B_s\to\phi\rho^0$ and $\bar B_s\to\phi\pi^0$ decays which are dominated by the electroweak penguins, and show that in presence of a new...
Mr
Remi Louvot
(Ecole Polytechnique Federale de Lausanne (EPFL))
10/12/2010, 15:15
T, C, P, CP symmetries, Accidental symmetries (B, L conservation)
The B-factories have successfully exploited the unique advantages
of the Upsilon(4S) resonance to study many aspects of Bd and Bu mesons.
The Upsilon(10860) (aka Upsilon(5S)) resonance, which is above mass
threshold for the Bs and shares many of the same advantages, has been
relatively unexplored. The Belle experiment has collected more
than 120 fb-1 at the Upsilon(10860). Recent...
Ms
Louise Oakes
(Technische Universität München)
10/12/2010, 15:40
T, C, P, CP symmetries, Accidental symmetries (B, L conservation)
The CDF experiment presents improved bounds on the CP-violating phase
beta_s and on the decay-width difference DeltaGamma_s of the neutral B_s0
meson system.
We use 6500 B_s0 --> J/psi Phi decays collected by the dimuon trigger and
reconstructed in a sample corresponding to 5.2 fb^{-1} of dat
Besides exploiting a two-fold increase in statistics with respect to the
previous measurement,...
Dr
Olivier Leroy
(CPPM CNRS/IN2P3 and Aix-Marseille University, France)
10/12/2010, 16:05
T, C, P, CP symmetries, Accidental symmetries (B, L conservation)
The determination of the CP-violating phase in B0_s -> J/psi phi decays is one of the key goals of the LHCb experiment. Its value is predicted to be very small in the Standard Model but can be significantly enhanced in many models of New Physics. The steps towards a precise determination of this phase with a flavour-tagged, time-dependent, angular analysis of the decay B0_s -> J/psi phi will...