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Träfflista för sökning "WFRF:(Ekelof T.) "

Sökning: WFRF:(Ekelof T.)

  • Resultat 81-90 av 93
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81.
  • Abdallah, J, et al. (författare)
  • ZZ production in e(+) e(-) interactions at root s=183-209 GeV
  • 2003
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 30:4, s. 447-466
  • Tidskriftsartikel (refereegranskat)abstract
    • Measurements of on-shell ZZ production are described, using data from the DELPHI experiment at LEP in e(+)e(-) collisions at centre-of-mass energies between 183 and 209 GeV, corresponding to an integrated luminosity of about 665 pb(-1). Results obtained in each of the final states q (q) over barq (q) over bar, nu(ν) over barq (q) over bar, mu(+)mu(-) q (q) over bar, e(+)e(-) r(+)r(-) q (q) over bar, l(+)l(-)l(+)l(-), and nu(ν) over barl(+)l(-) (with l = e, mu) are presented. The measured production cross-sections are consistent with the Standard Model expectations. These results update and supersede those already published at 183 and 189 GeV.
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82.
  • Abdallah, J, et al. (författare)
  • A measurement of the branching fractions of the b-quark into charged and neutral b-hadrons
  • 2003
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693. ; 576:1-2, s. 29-42
  • Tidskriftsartikel (refereegranskat)abstract
    • The production fractions of charged and neutral b-hadrons in b-quark events from Z(0) decays have been measured with the DELPHI detector at LEP. An algorithm has been developed, based on a neural network, to estimate the charge of the weakly-decaying b-hadron by distinguishing its decay products from particles produced at the primary vertex. From the data taken in the years 1994 and 1995, the fraction of (b) over bar -quarks fragmenting into positively charged weakly-decaying b-hadrons has been measured to be: f(+) = (42.09+/-0.82(stat)+/-0.89(syst))%. Subtracting the rates for charged Xi(b)(+) and Omega(b)(+) baryons gives the production fraction of B+ mesons: f(Bu) = (40.99+/-0.82(stat)+/-1.11 (syst)) %.
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83.
  • Abdallah, J, et al. (författare)
  • Search for eta(b) in two-photon collisions at LEP II with the DELPHI detector
  • 2006
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - : Elsevier BV. - 0370-2693 .- 1873-2445. ; 634:4, s. 340-346
  • Tidskriftsartikel (refereegranskat)abstract
    • The pseudoscalar meson eta(b) has been searched for in two-photon interactions at LEP II. The data sample corresponds to a total integrated luminosity of 617 pb(-1) at centre-of-mass energies ranging from 161 to 209 GeV. Upper limits at a confidence level of 95% on the product Gamma(gamma gamma) (eta(b)) x BR(eta(b)) are 190, 470 and 660 eV/c(2) for the eta(b) decaying into 4, 6 and 8 charged particles, respectively.
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84.
  • Wilson, J. A., et al. (författare)
  • The optical links of the ATLAS SemiConductor tracker
  • 2007
  • Ingår i: Journal of Instrumentation. - 1748-0221 .- 1748-0221. ; 2, s. 1-28
  • Tidskriftsartikel (refereegranskat)abstract
    • Optical links are used for the readout of the 4088 silicon microstrip modules that make up the SemiConductor Tracker of the ATLAS experiment at the CERN Large Hadron Collider (LHC). The optical link requirements are reviewed, with particular emphasis on the very demanding environment at the LHC. The on-detector components have to operate in high radiation levels for 10 years, with no maintenance, and there are very strict requirements on power consumption, material and space. A novel concept for the packaging of the on-detector optoelectronics has been developed to meet these requirements. The system architecture, including its redundancy features, is explained and the critical on-detector components are described. The results of the extensive Quality Assurance performed during all steps of the assembly are discussed.
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85.
  • Antonioli, P, et al. (författare)
  • The AQUA-RICH atmospheric neutrino experiment
  • 1999
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - : ELSEVIER SCIENCE BV. - 0168-9002. ; 433:1-2, s. 104-120
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • We describe a 125 m diameter spherical detector containing 1 Mt of water, capable of high rate observation of atmospheric neutrino events (30000/y). The ring imaging Cherenkov (RICH) technique is used to measure velocity, momentum and direction of particl
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86.
  • Eerola, Paula, et al. (författare)
  • The Nordugrid production grid infrastructure, status and plans
  • 2003
  • Ingår i: Proceedings. Fourth International Workshop on Grid Computing. - 076952026X ; , s. 158-165
  • Konferensbidrag (refereegranskat)abstract
    • Nordugrid offers reliable grid services for academic users over an increasing set of computing & storage resources spanning through the Nordic countries Denmark, Finland, Norway and Sweden. A small group of scientists has already been using the Nordugrid as their daily computing utility. In the near future we expect a rapid growth both in the number of active users and available resources thanks to the recently launched Nordic grid projects.We report on the present status and short term plans of the Nordic grid infrastructure and describe the available and foreseen resources, grid services and our forming user base
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87.
  • Andreazza, A, et al. (författare)
  • The DELPHI very forward tracker for LEP200
  • 1995
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. ; 367:1-3
  • Annan publikation (övrigt vetenskapligt/konstnärligt)
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88.
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89.
  • Ekelof, T (författare)
  • Advances in RICH particle identification
  • 2000
  • Ingår i: NUCLEAR PHYSICS A. - : ELSEVIER SCIENCE BV. - 0375-9474. ; 663, s. 1065C-1068C
  • Tidskriftsartikel (refereegranskat)abstract
    • The Ring Imaging Cherenkov (RICH) technique for particle identification has undergone considerable development since it was first proposed more than 20 years ago. The present report focuses on developments that have occurred over the last few years in the
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90.
  • Ekelof, T (författare)
  • Optics and radiators for RICH
  • 1999
  • Ingår i: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT. - : ELSEVIER SCIENCE BV. - 0168-9002. ; 433:1-2, s. 372-384
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • An overview is given of the basic optics-design principles for Ring Imaging Cherenkov (RICH) counters in High-Energy Physics - of the earlier evolution of these principles and of the new ideas and techniques that are currently being developed. The charact
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  • Resultat 81-90 av 93

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