Article

Zeitschrift für Physik C Particles and Fields

, Volume 68, Issue 1, pp 47-64

First online:

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

  • T. ÅkessonAffiliated withCERN
  • , S. AlmehedAffiliated withUniversity of Lund
  • , A. L. S. AngelisAffiliated withUniversity College London
  • , J. AntosAffiliated withCERN
  • , H. AthertonAffiliated withCERN
  • , P. AubryAffiliated withUniversity of Montreal
  • , H. W. BartelsAffiliated withUniversity of Heidelberg
  • , G. BeaudoinAffiliated withUniversity of Montreal
  • , J. M. BeaulieuAffiliated withUniversity of Montreal
    • , H. BekerAffiliated withCERN
    • , O. BenaryAffiliated withUniversity of Tel Aviv
    • , D. BettoniAffiliated withCERN
    • , V. BisiAffiliated withUniversity of Turin and INFN
    • , I. BlevisAffiliated withCERN
    • , H. BøggildAffiliated withCERN
    • , W. ClelandAffiliated withUniversity of Pittsburgh
    • , M. ClemenAffiliated withUniversity of Pittsburgh
    • , B. CollickAffiliated withUniversity of Pittsburgh
    • , F. CorriveauAffiliated withMcGill University
    • , S. DaganAffiliated withUniversity of Tel Aviv
    • , K. DederichsAffiliated withCERN
    • , P. DepommierAffiliated withUniversity of Montreal
    • , N. DiGiacomoAffiliated withLos Alamos National Laboratory
    • , S. DiLibertoAffiliated withUniversity of Rome ‘La Sapienza’ and INFN
    • , J. R. DoddAffiliated withUniversity College London
    • , B. DolgosheinAffiliated withInstitute of Physics and Engineering
    • , A. DreesAffiliated withUniversity of Heidelberg
    • , S. EidelmanAffiliated withInstitute of Nuclear Physics
    • , H. En'yoAffiliated withCERN
    • , B. ErlandssonAffiliated withUniversity of Stockholm
    • , M. J. EstenAffiliated withUniversity College London
    • , C. W. FabjanAffiliated withCERN
    • , P. FischerAffiliated withUniversity of Heidelberg
    • , A. GaidotAffiliated withDAPNIA, CE Saclay
    • , F. Gibrat-DebuAffiliated withDAPNIA, CE Saclay
    • , P. GiubellinoAffiliated withUniversity of Turin and INFN
    • , P. GlässelAffiliated withUniversity of Heidelberg
    • , U. GoerlachAffiliated withCERN
    • , Y. GolubkovAffiliated withInstitute of Physics and Engineering
    • , R. HaglundAffiliated withUniversity of Lund
    • , L. A. HamelAffiliated withMcGill University
    • , H. van HeckeAffiliated withLos Alamos National Laboratory
    • , V. HedbergAffiliated withCERN
    • , R. HeifetzAffiliated withUniversity of Tel Aviv
    • , A. HolscherAffiliated withUniversity of Heidelberg
    • , B. JacakAffiliated withLos Alamos National Laboratory
    • , G. JarlskogAffiliated withUniversity of Lund
    • , S. JohannsonAffiliated withUniversity of Lund
    • , H. KranerAffiliated withBrookhaven National Laboratory
    • , V. KrohAffiliated withUniversity of Heidelberg
    • , F. LamarcheAffiliated withMcGill University
    • , C. LeroyAffiliated withMcGill University
    • , D. LissauerAffiliated withBrookhaven National Laboratory
    • , G. LondonAffiliated withDAPNIA, CE Saclay
    • , B. LorstadAffiliated withUniversity of Lund
    • , A. LounisAffiliated withUniversity of Montreal
    • , F. MartelliAffiliated withUniversity of Turin and INFN
    • , A. Marzari-ChiesaAffiliated withUniversity of Turin and INFN
    • , M. MaseraAffiliated withUniversity of Turin and INFN
    • , M. A. MazzoniAffiliated withCERN
    • , E. MazzucatoAffiliated withMcGill University
    • , M. L. McCubbinAffiliated withUniversity College London
    • , N. A. McCubbinAffiliated withRutherford Appleton Laboratory
    • , P. McGaugheyAffiliated withLos Alamos National Laboratory
    • , F. MeddiAffiliated withUniversity of Rome ‘La Sapienza’ and INFN
    • , U. MjörnmarkAffiliated withUniversity of Lund
    • , M. T. MuciacciaAffiliated withUniversity of Bari and INFN
    • , S. MuravievAffiliated withLebedev Institute of Physics
    • , M. MurrayAffiliated withUniversity of Pittsburgh
    • , M. NeubertAffiliated withUniversity of Heidelberg
    • , P. NevskiAffiliated withInstitute of Physics and Engineering
    • , S. NilssonAffiliated withUniversity of Stockholm
    • , L. OlsenAffiliated withBrookhaven National Laboratory
    • , Y. OrenAffiliated withUniversity of Tel Aviv
    • , J. P. PansartAffiliated withDAPNIA, CE Saclay
    • , Y. M. ParkAffiliated withUniversity of Pittsburgh
    • , A. PfeifferAffiliated withUniversity of Heidelberg
    • , F. PiuzAffiliated withCERN
    • , V. PolychronakosAffiliated withBrookhaven National Laboratory
    • , P. PomianowskiAffiliated withUniversity of Pittsburgh
    • , G. PoulardAffiliated withCERN
    • , M. PriceAffiliated withCERN
    • , D. RahmAffiliated withBrookhaven National Laboratory
    • , L. RamelloAffiliated withUniversity of Turin and INFN
    • , L. RiccatiAffiliated withUniversity of Turin and INFN
    • , G. RomanoAffiliated withUniversity of Salerno and INFN
    • , G. RosaAffiliated withUniversity of Rome ‘La Sapienza’ and INFN
    • , L. SandorAffiliated withCERN
    • , J. SchukraftAffiliated withCERN
    • , M. SekimotoAffiliated withCERN
    • , M. SemanAffiliated withCERN
    • , A. ShikonianAffiliated withLebedev Institute of Physics
    • , A. ShmelevaAffiliated withLebedev Institute of Physics
    • , V. SidorovAffiliated withInstitute of Nuclear Physics
    • , S. SimoneAffiliated withUniversity of Bari and INFN
    • , Y. SiroisAffiliated withMcGill University
    • , H. SlettenAffiliated withCERN
    • , S. SmirnovAffiliated withInstitute of Physics and Engineering
    • , W. SondheimAffiliated withLos Alamos National Laboratory
    • , H. J. SpechtAffiliated withUniversity of Heidelberg
    • , E. SternAffiliated withUniversity of Pittsburgh
    • , I. StumerAffiliated withBrookhaven National Laboratory
    • , A. SumarokovAffiliated withInstitute of Physics and Engineering
    • , J. W. SunierAffiliated withLos Alamos National Laboratory
    • , V. TcherniatinAffiliated withInstitute of Physics and Engineering
    • , J. ThompsonAffiliated withUniversity of Pittsburgh
    • , V. TikhomirovAffiliated withLebedev Institute of Physics
    • , A. VanyashinAffiliated withInstitute of Physics and Engineering
    • , G. VasseurAffiliated withDAPNIA, CE Saclay
    • , R. J. VeenhofAffiliated withCERN
    • , R. WigmansAffiliated withCERN
    • , W. J. WillisAffiliated withCERN
    • , P. YepesAffiliated withMcGill University

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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.