Production of prompt positrons at low transverse momentum in 63 GeV pp collisions at the CERN intersecting storage rings

T. Åkesson*, M. G. Albrow, S. Almehed, E. Anassontzis, R. Batley, O. Benary, H. Bøggild, O. Botner, H. Breuker, H. Brody, V. Burkert, B. Callen, R. Carosi, A. A. Carter, J. R. Carter, P. C. Cecil, V. Chernyatin, Y. Choi, W. E. Cleland, S. DaganE. Dahl-Jensen, I. Dahl-Jensen, P. Dam, G. Damgaard, B. Dolgoshein, S. Eidelman, W. M. Evans, C. W. Fabjan, P. Frandsen, S. Frankel, W. Frati, I. Gavrilenko, M. D. Gibson, U. Goerlach, Y. Goloubkov, H. Gordon, K. H. Hansen, V. Hedberg, J. W. Hiddleston, J. E. Hooper, P. Ioannou, G. Jarlskog, P. Jeffreys, T. Jensen, A. Kalinovsky, V. Kantserov, S. Katsanevas, G. Kesseler, T. Killian, C. Kourkoumelis, R. Kroeger, K. Kulka, J. v.d. Lans, J. Lindsay, D. Lissauer, B. Lörstad, T. Ludlam, I. Mannelli, A. Markou, S. Mayburov, N. A. McCubbin, U. Mjörnmark, R. Møller, W. Molzon, P. Nevsky, B. S. Nielsen, L. H. Olsen, Y. Oren, R. B. Palmer, G. Piskounov, D. C. Rahm, L. K. Resvanis, E. Rosso, A. Rudge, J. Schukraft, A. Shmeleva, V. Sidorov, H. Specht, I. Stumer, M. Sullivan, J. A. Thompson, G. Thorstenson, P. Vasiliev, E. Vella, J. Williamson, W. J. Willis, M. Winik, W. Witzeling, C. Woody, W. A. Zajc

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The production of inclusive prompt positrons in pp collisions at √s = 63 GeV and θcm = 90° has been measured over the pT interval 0.08 <pT < 1.0 GeV c. The e/π ratio rises from ∼ 2 × 10-4 at pT = 0.9 GeV c to ∼ 1 × 10-3 at pT = 0.1 GeV c. This is a factor of 6 higher than would be expected from the sum of hadronic bremsstrahlung and the semileptonic decay of charm.

Original languageEnglish
Pages (from-to)411-418
Number of pages8
JournalPhysics Letters B
Volume152
Issue number5-6
DOIs
StatePublished - 14 Mar 1985

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