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

Åkesson, T.; Almehed, S.; Angelis, A.L. S.; Antos, J.; Atherton, H.; Aubry, P.; Bartels, H.W.; Beaudoin, G.; Beaulieu, J.M.; Beker, H.

doi:10.1007/BF01579804

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

Aug, 1994

36 pages

Published in:

Z.Phys.C 68 (1995) 47-64

DOI:

10.1007/BF01579804

Report number:

CERN-PPE-94-140

Experiments:

CERN-NA-034

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Abstract: (Springer)

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.

p nucleus: nuclear reaction
beryllium
electron: pair production
pair production: electron
muon: pair production
pair production: muon
meson: decay modes
decay modes: meson
mass spectrum: dilepton
dilepton: mass spectrum

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