PLHC2011 - Physics at LHC 2011

Session

4C Parallel - B, charm and onia

9 Jun 2011, 14:30

Perugia Congress Center GIO

77. Search for New Physics with rare decays of B and Bs mesons at LHCb (15' +5')

Johannes Albrecht (CERN)

09/06/2011, 14:30

Rare decays of the B and Bs mesons are sensitive indirect probes of New Physics. In particular, the search for B(s) --> μ+μ– decays provides information on the presence of new (pseudo-)scalar particles, while the angular analysis of decays like B --> K*μ+μ– provides information on possible new vector-axial contributions. Furthermore radiative decays like Bs --> Φγ provide valuable...

78. Quarkonium Production at ATLAS (15' + 5')

Kendall Reeves (University of Texas at Dallas)

09/06/2011, 14:50

The production of quarkonium is an important testing ground for QCD calculations. The fraction of J/\psi mesons produced from B-hadron decays was measured by the ATLAS experiment and the prompt and non-prompt differential J/\psi production cross-sections determined. The cross-section values extracted from data are compared to predictions from next-to-leading order QCD calculations. Results...

79. Signals of supersymmetry in flavour physics (20' + 5')

Wolfgang Altmannshofer (Fermilab)

09/06/2011, 15:10

We discuss the characteristic signals of supersymmetric models in low energy observables that are sensitive to flavour and CP violation. We focus in particular on two of the golden channels at LHCb: the rare Bs - μ+μ− decay and CP violation in Bs mixing. We show the distinct predictions for the above flavour observables within several supersymmetric frameworks, including the MSSM with Minimal...

80. Mixing and CP violation in the Bs system at LHCb (15' + 5')

Greig Cowan (EPFL)

09/06/2011, 15:35

The determination of the CP-violating phase Φs in Bs0 -> J/ Ψ Φ 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. To perform the first LHCb analysis of Φs on 2010 data at a centre-of-mass energy of 7 TeV, many milestones needed to be achieved first, such as the...

81. Measurements of quarkonia production and polarization with the CMS experiment (15'+ 5')

Hermine K. Woehri (CERN)

09/06/2011, 15:55

This talk presents the J/psi and psi(2S) differential cross sections and J/psi spin alignment in pp collisions at 7 TeV, as a function of transverse momentum and in several rapidity ranges, on the basis of the 2010 data collected by CMS. The B to J/psi and B to psi(2S) fractions will also be presented, and compared to other measurements as well as to theory calculations. We also report the...

82. CP-violation measurements and prospects with hadronic B decays at LHCb (15'+ 5')

Lars Eklund (University of Glasgow)

09/06/2011, 16:15

Using data collected by the LHCb detector during the 2010 run of the LHC we reconstruct the main charmless charged two-body b-hadron decay modes, namely B0--> pi+pi–, B0 --> K+pi–, Bs0 --> K+K–, Bs0 --> pi+K–, Lamdab --> pK– and Lamdab --> ppi–, and obtain first preliminary measurements of direct CP asymmetries. We also present studies of decays of the type B --> DX, where D is a charmed meson...