918 research outputs found
Present status of our knowledge of |V_{cb}|
The Cabibbo-Kobayashi-Maskawa parameter plays an important role
among the experimental constraints of the Yukawa sector of the Standard Model.
The present status of our knowledge will be summarized with particular emphasis
to the interplay between theoretical and experimental advances needed to
improve upon present uncertainties.Comment: 12 pages, 2 figures; talk given at Beauty 2003, Pittsburgh, PA,
October 200
The BTeV RICH Front End Electronics
We report on the design and testing of novel mixed analog and digital front
end ASICs custom made for the single photon detectors considered for the BTeV
RICH system. The key features are reviewed, as well as results achieved using
electronics bench tests and beam studies.Comment: 7 pages, 4 figures, talk given at the 5th International Workshop on
Ring Imaging Cherenkov Counters (RICH2004
Present Status of experimental determination of Vcb
The present status of our knowledge of the magnitude of the quark mixing
parameter Vcb is reviewed, with particular emphasis on the factors affecting
experimental and theoretical errors and on prospects for a more precise
determination.Comment: 15 pages and 3 figures, an abbreviated version is included in PDG2002
as a mini-review on Vc
Study of the spatial resolution achievable with the BTeV pixel sensors
A Monte Carlo simulation has been developed to predict the spatial resolution
of silicon pixel detectors. The results discussed in this paper focus on the
unit cell geometry of 50 m x 400 m, as chosen for BTeV. Effects taken
into account include energy deposition fluctuations along the charged particle
path, diffusion, magnetic field and response of the front end electronics. We
compare our predictions with measurements from a recent test beam study
performed at Fermilab.Comment: 9 pages, 5 figures Talk given at PIXEL 2000 International Workshop on
Semiconductor Pixel Detectors for Particles and X-rays, Genova, June 200
B Meson Decays
We discuss the most important Physics thus far extracted from studies of B
meson decays. Measurements of the four CP violating angles accessible in B
decay are reviewed as well as direct CP violation. A detailed discussion of the
measurements of the CKM elements V_{cb} and V_{ub} from semileptonic decays is
given, and the differences between resulting values using inclusive decays
versus exclusive decays is discussed. Measurements of "rare" decays are also
reviewed. We point out where CP violating and rare decays could lead to
observations of physics beyond that of the Standard Model in future
experiments. If such physics is found by directly observation of new particles,
e.g. in LHC experiments, B decays can play a decisive role in interpreting the
nature of these particles.Comment: 80 pages, 29 figures, invited review article for PMC Physics A;
version 2 a few minor corrections, version 3 fixed some references, version 4
two minor fixe
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