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Sökning: (WFRF:(Lamsa J.)) srt2:(2003)

  • Resultat 11-13 av 13
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11.
  • 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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12.
  • Abdallah, J, et al. (författare)
  • Searches for supersymmetric particles in e(+)e(-) collisions up to 208 GeV and interpretation of the results within the MSSM
  • 2003
  • Ingår i: European Physical Journal C. Particles and Fields. - : Springer Science and Business Media LLC. - 1434-6044. ; 31:4, s. 421-479
  • Tidskriftsartikel (refereegranskat)abstract
    • DELPHI data collected at centre-of-mass energies up to 208 GeV have been analysed to search for charginos, neutralinos and sfermions in the framework of the Minimal Supersymmetric Standard Model (MSSM) with R-parity conservation. No evidence for a signal was found in any of the channels. The results of each search were used to derive limits on production cross-sections and particle masses. In addition, the combined result of all searches excludes regions in the parameter space of the constrained MSSM, leading to limits on the mass of the Lightest Supersymmetric Particle and other supersymmetric particles.
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13.
  • Abdallah, J, et al. (författare)
  • Study of inclusive J/psi production in two-photon collisions at LEP II with the DELPHI detector
  • 2003
  • Ingår i: Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics. - 0370-2693. ; 565:1-4, s. 76-86
  • Tidskriftsartikel (refereegranskat)abstract
    • Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A clear signal from the reaction gammagamma --> J/psi + X is seen. The number of observed N(J/psi --> mu(+)mu(-)) events is 36+/-7 for an integrated luminosity of 617 pb(-1), yielding a cross-section of sigma(J/psi + X) = 45+/-9(stat) +/- 17(syst) pb. Based on a study of the event shapes of different types of gammagamma processes in the PYTHIA program, we conclude that (74+/-22) % of the observed J/psi events are due to 'resolved' photons, the dominant contribution of which is most probably due to the gluon content of the photon. (C) 2003 Published by Elsevier B.V.
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  • Resultat 11-13 av 13
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refereegranskat (13)
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Abdallah, J (13)
Smirnova, Oxana (13)
Andreazza, A. (13)
Anjos, N. (13)
Baroncelli, A. (13)
Benekos, N. (13)
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Besson, N. (13)
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Canale, V. (13)
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Ferrer, A. (13)
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Hamacher, K. (13)
Haug, S. (13)
Kluit, P. (13)
Kourkoumelis, C. (13)
Leitner, R. (13)
Liebig, W. (13)
Lipniacka, A. (13)
Maltezos, S. (13)
Masik, J. (13)
Meroni, C. (13)
Moa, T. (13)
Morettini, P. (13)
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van Vulpen, I. (13)
Vrba, V. (13)
Weiser, C. (13)
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Moenig, K. (13)
Asman, B. (13)
Joram, C. (13)
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Wahlen, H. (13)
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Lunds universitet (13)
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Engelska (13)
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2003 (13)

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