36,035 research outputs found
Study of the electron trigger efficiency of the CMS Experiment using test beam data
A study of the electron identification and selection efficiency of the L1
Trigger algorithm has been performed using the combined ECAL/HCAL test beam
data. A detailed discussion of the electron isolation and its impact on the
selection efficiency is presented. The L1 electron algorithm is studied for
different beam energies and the results indicate that efficiencies of 98% or
more can be achieved for electrons with energies between 15 and 100 GeV. The
fraction of charged hadrons with energies from 3 up to 100 GeV rejected by the
L1 electron trigger algorithm is estimated to be larger than 93%.Comment: 22 pages, 14 figure
Orbital Fluctuation-Induced Triplet Superconductivity : Mechanism of Superconductivity in
The mechanism of superconductivity in is studied
using a degenerate Hubbard model within the weak coupling theory. When the
system approaches the orbital instability which is realized due to increasing
the on-site Coulomb interaction between the electrons in the different
orbitals, it is shown that the triplet superconductivity appears. This
superconducting mechanism is only available in orbitally degenerate systems
with multiple Fermi surfaces.Comment: 5 pages, 4 figure
Role of Group and Phase Velocity in High-Energy Neutrino Observatories
Kuzmichev recently showed that use of phase velocity rather than group
velocity for Cherenkov light signals and pulses from calibration lasers in
high-energy neutrino telescopes leads to errors in track reconstruction and
distance measurement. We amplify on his remarks and show that errors for four
cases of interest to AMANDA, IceCube, and RICE (radio Cherenkov detector) are
negligibly small.Comment: To be published in Astroparticle Physics, 6 pages, uses elsart.st
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