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Low-mass lepton-pair production in p-Be collisions at 450 GeV/c

  • T. Åkesson
  • , S. Almehed
  • , A. L.S. Angelis
  • , J. Antos
  • , H. Atherton
  • , P. Aubry
  • , H. W. Bartels
  • , G. Beaudoin
  • , J. M. Beaulieu
  • , H. Beker
  • , O. Benary
  • , D. Bettoni
  • , V. Bisi
  • , I. Blevis
  • , H. Bøggild
  • , W. Cleland
  • , M. Clemen
  • , B. Collick
  • , F. Corriveau
  • , S. Dagan
  • K. Dederichs, P. Depommier, N. DiGiacomo, S. DiLiberto, J. R. Dodd, B. Dolgoshein, A. Drees, S. Eidelman, H. En'yo, B. Erlandsson, M. J. Esten, C. W. Fabjan, P. Fischer, A. Gaidot, F. Gibrat-Debu, P. Giubellino, P. Glässel, U. Goerlach, Y. Golubkov, R. Haglund, L. A. Hamel, H. van Hecke, V. Hedberg, R. Heifetz, A. Holscher, B. Jacak, G. Jarlskog, S. Johannson, H. Kraner, V. Kroh, F. Lamarche, C. Leroy, D. Lissauer, G. London, B. Lorstad, A. Lounis, F. Martelli, A. Marzari-Chiesa, M. Masera, M. A. Mazzoni, E. Mazzucato, M. L. McCubbin, N. A. McCubbin, P. McGaughey, F. Meddi, U. Mjörnmark, M. T. Muciaccia, S. Muraviev, M. Murray, M. Neubert, P. Nevski, S. Nilsson, L. Olsen, Y. Oren, J. P. Pansart, Y. M. Park, A. Pfeiffer, F. Piuz, V. Polychronakos, P. Pomianowski, G. Poulard, M. Price, D. Rahm, L. Ramello, L. Riccati, G. Romano, G. Rosa, L. Sandor, J. Schukraft, M. Sekimoto, M. Seman, A. Shikonian, A. Shmeleva, V. Sidorov, S. Simone, Y. Sirois, H. Sletten, S. Smirnov, W. Sondheim, H. J. Specht, E. Stern, I. Stumer, A. Sumarokov, J. W. Sunier, V. Tcherniatin, J. Thompson, V. Tikhomirov, A. Vanyashin, G. Vasseur, R. J. Veenhof, R. Wigmans, W. J. Willis, P. Yepes
  • European Organization for Nuclear Research
  • Lund University
  • University College London
  • Universite de Montreal
  • University of Heidelberg
  • Tel Aviv University
  • University of Turin
  • University of Pittsburgh
  • McGill University
  • MST-8, Los Alamos National Laboratory
  • University of Rome
  • National Research Nuclear University MEPhI
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Stockholm University
  • Institut Pierre Simon Laplace, CNRS and CEA
  • Brookhaven National Laboratory
  • CCLRC Rutherford Appleton Laboratory
  • Università degli studi di Bari Aldo Moro
  • P.N. Lebedev Physical Institute of the Russian Academy of Sciences
  • University of Salerno

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the production of low-mass electron pairs and muon pairs in p-Be collisions at 450 GeV/c at the CERN SPS. For both electron and muon pairs the low-mass spectrum can be explained satisfactorily by lepton pairs from hadronic decays, and there is no need to invoke any "unconventional" source. The normalisation of the major hadronic sources is set by the data. The upper limit, at 90% confidence level, on any new source of lepton pairs is ∼20% of the hadronic decay contribution for muons, and ∼40% for electrons.

Original languageEnglish
Pages (from-to)47-64
Number of pages18
JournalZeitschrift fur Physik C-Particles and Fields
Volume68
Issue number1
DOIs
Publication statusPublished - 1 Mar 1995
Externally publishedYes

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