2,153 research outputs found
A Study of Monolithic CMOS Pixel Sensors Back-thinning and their Application for a Pixel Beam Telescope
This paper reports results on a detailed study of charge collection and
signal-to-noise performance of CMOS monolithic pixel sensors before and after
back-thinning and their application in a pixel beam telescope for the ALS 1.5
GeV beam test facility.Comment: 6 pages, one figure, to appear on the proceedings of the the Sixth
International "Hiroshima" Symposium on the Development and Application of
Semiconductor Tracking Detectors, Carmel, CA, September, 200
A Study of e+e- -> H0A0 Production and the Constraint on Dark Matter Density
This paper reports the results of a study of the e+e- -> H0A0 process at 1
TeV performed on fully simulated and reconstructed events. The estimated
accuracies on the heavy Higgs boson masses, widths and decay branching
fractions are discussed in relation to the study of Supersymmetric Dark Matter.Comment: 5 pages, 4 figures, submitted to Phys. Rev.
Tracking and Vertexing with a Thin CMOS Pixel Beam Telescope
We present results of a study of charged particle track and vertex
reconstruction with a beam telescope made of four layers of 50 micron-thin CMOS
monolithic pixel sensors using the 120 GeV protons at the FNAL Meson Test Beam
Facility. We compare our results to the performance requirements of a future
e+e- linear collider in terms of particle track extrapolation and vertex
reconstruction accuracies.Comment: 9 pages, 7 figures submitted to Nuclear Instruments and Methods
Measurement of the Forward-Backward Asymmetry in the B -> K(*) mu+ mu- Decay and First Observation of the Bs -> phi mu+ mu- Decay
We reconstruct the rare decays , , and in a data sample
corresponding to collected in collisions at
by the CDF II detector at the Fermilab Tevatron
Collider. Using and decays we report the branching ratios. In addition, we report
the measurement of the differential branching ratio and the muon
forward-backward asymmetry in the and decay modes, and the
longitudinal polarization in the decay mode with respect to the squared
dimuon mass. These are consistent with the theoretical prediction from the
standard model, and most recent determinations from other experiments and of
comparable accuracy. We also report the first observation of the {\mathcal{B}}(B^0_s \to
\phi\mu^+\mu^-) = [1.44 \pm 0.33 \pm 0.46] \times 10^{-6}27 \pm 6B^0_s$ decay observed.Comment: 7 pages, 2 figures, 3 tables. Submitted to Phys. Rev. Let
Search for a New Heavy Gauge Boson Wprime with Electron + missing ET Event Signature in ppbar collisions at sqrt(s)=1.96 TeV
We present a search for a new heavy charged vector boson decaying
to an electron-neutrino pair in collisions at a center-of-mass
energy of 1.96\unit{TeV}. The data were collected with the CDF II detector
and correspond to an integrated luminosity of 5.3\unit{fb}^{-1}. No
significant excess above the standard model expectation is observed and we set
upper limits on . Assuming standard
model couplings to fermions and the neutrino from the boson decay to
be light, we exclude a boson with mass less than
1.12\unit{TeV/}c^2 at the 95\unit{%} confidence level.Comment: 7 pages, 2 figures Submitted to PR
Measurements of the properties of Lambda_c(2595), Lambda_c(2625), Sigma_c(2455), and Sigma_c(2520) baryons
We report measurements of the resonance properties of Lambda_c(2595)+ and
Lambda_c(2625)+ baryons in their decays to Lambda_c+ pi+ pi- as well as
Sigma_c(2455)++,0 and Sigma_c(2520)++,0 baryons in their decays to Lambda_c+
pi+/- final states. These measurements are performed using data corresponding
to 5.2/fb of integrated luminosity from ppbar collisions at sqrt(s) = 1.96 TeV,
collected with the CDF II detector at the Fermilab Tevatron. Exploiting the
largest available charmed baryon sample, we measure masses and decay widths
with uncertainties comparable to the world averages for Sigma_c states, and
significantly smaller uncertainties than the world averages for excited
Lambda_c+ states.Comment: added one reference and one table, changed order of figures, 17
pages, 15 figure
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