The associated charged particle multiplicity of high-p$_{T}$ pi$^{0}$ and single-photon events

The associated charged particle multiplicities of high-p/sub T/ pi /sup 0/ and single-photon events were measured at the CERN intersecting storage rings using lead/liquid-argon calorimeters and a scintillation counter array placed around the intersection region. The average multiplicity on the trigg...

Descripción completa

Detalles Bibliográficos
Autores principales: Diakonou, M K, Kourkoumelis, C, Resvanis, L K, Filippas-Tassos, A, Fokitis, E, Karpathopoulos, S, Cnops, A M, Fowler, E C, Hood, D M, Killian, T, Ludlam, Thomas W, Palmer, R B, Rahm, David Charles, Rehak, P, Stumer, I, Cockerill, D J A, Fabjan, Christian Wolfgang, Hallgren, A, Kreisler, M N, Lissauer, D, Mannelli, I, Molzon, W R, Mouzourakis, P, Nielsen, B S, Oren, Y, Rosselet, L, Willis, W J, Botner, O, Bøggild, H, Dahl-Jensen, Erik, Dahl-Jensen, I, Damgaard, G, Hansen, K H, Hooper, J, Møller, R, Nielsen, S Ø, Schistad, B L, Åkesson, T, Almehed, S, von Dardel, Guy F, Henning, S, Jarlskog, G, Lörstad, B, Melin, A, Mjörnmark, U, Nilsson, A, Svensson, L, Albrow, Michael G, McCubbin, N A, Benary, O, Dagan, S
Lenguaje:eng
Publicado: 1980
Materias:
Particle Physics - Experiment
Acceso en línea:https://dx.doi.org/10.1016/0370-2693(80)90454-2
http://cds.cern.ch/record/133644
Descripción
Sumario:The associated charged particle multiplicities of high-p/sub T/ pi /sup 0/ and single-photon events were measured at the CERN intersecting storage rings using lead/liquid-argon calorimeters and a scintillation counter array placed around the intersection region. The average multiplicity on the trigger side for the single-photon events was found to be significantly lower than that for the pi /sup 0/ events. The away-side multiplicity for both pi /sup 0/ and single- photon events increases with the trigger particle p/sub T/, but, at a fixed p/sub T/, the direct photon sample was found to have a slightly lower average multiplicity. The differences in the event structure can be explained if a large fraction of the single photons are produced via qg to gamma q constituent scattering. (16 refs).

Ejemplares similares