2,339 research outputs found
Resistive plate chambers working at high rate
No full textResistive Plate Chambers operating at low gas amplification have been tested in the RD5 experiment at CERN on a high intensity pion beam together with a 14 mCi (CO)-C-60 source to give an uniform photon background, simulating conditions close to those expected for an LHC muon detector
Topics in the Measurement of the Electrons with the ATLAS Detector at the LHC
No full textStony Brook University Libraries.
SBU Graduate School in Physics and Astronomy.
Lawrence Martin (Dean of Graduate School), Professor Michael Rijssenbeek, Thesis Advisor
Department of Physics, Professor John Hobbs, Chairman of the defense committee
Department of Physics, Professor John Smith
C. N. Yang Institute of Theoretical Physics, Professor Abhay Deshpande
Department of Physics, Dr. Isabelle Wingerter-Seez, Outside member
Laboratoire d’Annecy-le-vieux de Physique des Particules/IN2P3
Annecy, France
Erratum to: Search for new physics in dijet angular distributions using proton-proton collisions at
No full textErratum to: Eur. Phys. J. C (2018) 78:789 https://doi.org/10.1140/epjc/s10052-018-6242-x
In this article the author name Luigi Calligaris was incorrectly written as A. Calligaris. The original article has been
corrected
Performance of A DTBX Prototype
No full textA novel muon detector concept for LHC was studied in a test beam. The application of mean-timer technique to arrays of drift tubes provides the space and time resolution needed for first level trigger and track reconstruction using only the drift time information. A complete study of the performance of this new detector was done
Bunch crossing identification at LHC using a mean-timer technique
No full textA novel method was developed to obtain precise timing of muon hits in drift tubes at the first trigger level, and hence to associate a detected muon with the bunch crossing in which it originated. A very good time resolution of approximately 2 ns was obtained. Some other topics related to muon detection were investigated
Study of the B+c → J/ψD+s and B+c → J/ψD*s+ decays with the ATLAS detector
No full textThe decays B-c(+) -> J/psi D-s(+) and B-c(+) -> J/psi D-s*(+) are studied with the ATLAS detector at the LHC using a dataset corresponding to integrated luminosities of 4.9 and 20.6 fb(-1) of pp collisions collected at centre-of-mass energies root s = 7 TeV and 8 TeV, respectively. Signal candidates are identified through J/psi -> mu(+)mu(-) and D-s(()*()+) -> phi pi(+)(gamma/pi(0)) decays. With a two-dimensional likelihood fit involving the B-c(+) reconstructed invariant mass and an angle between the mu(+) and D-s(+) candidate momenta in the muon pair rest frame, the yields of B-c(+) -> J/psi D-s(+) and B-c(+) -> J/psi D-s*(+), and the transverse polarisation fraction in B-c(+) -> J/psi D-s*(+) decay are measured. The transverse polarisation fraction is determined to be Gamma +/-+/-(B-c(+) -> J/psi D-s*(+))/Gamma(B-c(+) -> J/psi D-s*(+)) = 0.38 +/- 0.23 +/- 0.07, and the derived ratio of the branching fractions of the two modes is B-Bc+ -> J/psi D-s*+/B-Bc+ -> J/psi D-s(+) = 2.8(-0.8)(+1.2) +/- 0.3, where the first error is statistical and the second is systematic. Finally, a sample of B-c(+) -> J/psi pi(+) decays is used to derive the ratios of branching fractions B-Bc+ -> J/psi D-s*+/B-Bc+ -> J/psi pi(+) = 3.8 +/- 1.1 +/- 0.4 +/- 0.2 and B-Bc+ -> J/psi D-s*+/B-Bc+ -> J/psi pi(+) = 10.4 +/- 3.1 +/- 1.5 +/- 0.6, where the third error corresponds to the uncertainty of the branching fraction of D-s(+) -> phi(K+ K-)pi(+) decay. The available theoretical predictions are generally consistent with the measurement.ATLAS Collaboration, for complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-015-3743-8</p
Parallel plate chambers: a fast detector for ionizing particles
No full textThe parallel plate chamber technique is summarized together with recent results of tests concerning efficiency, time resolution, high rate capability and radiation resistance. © 1994
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