4,878 research outputs found
Spectroscopy and lifetime of bottom and charm hadrons
We review recent experimental results on spectroscopy and lifetime of bottom
and charm hadrons.Comment: 11 pages, 6 figures. Invited talk at the 3rd International Conference
on B Physics and CP Violation, December 3 - 7, 1999, Taipei, Taiwa
A New Scintillator Tile/Fiber Preshower Detector for the CDF Central Calorimeter
A detector designed to measure early particle showers has been installed in
front of the central CDF calorimeter at the Tevatron. This new preshower
detector is based on scintillator tiles coupled to wavelength-shifting fibers
read out by multi-anode photomultipliers and has a total of 3,072 readout
channels. The replacement of the old gas detector was required due to an
expected increase in instantaneous luminosity of the Tevatron collider in the
next few years. Calorimeter coverage, jet energy resolution, and electron and
photon identification are among the expected improvements. The final detector
design, together with the R&D studies that led to the choice of scintillator
and fiber, mechanical assembly, and quality control are presented. The detector
was installed in the fall 2004 Tevatron shutdown and started collecting
colliding beam data by the end of the same year. First measurements indicate a
light yield of 12 photoelectrons/MIP, a more than two-fold increase over the
design goals.Comment: 5 pages, 10 figures (changes are minor; this is the final version
published in IEEE-Trans.Nucl.Sci.
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B states and lifetimes at CDF
The measurements at CDF of the masses and lifetimes of weakly decaying B hadrons are described. 11 refs., 2 figs
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