High-resolution measurement of massive-dielectron production in 800-GeV proton-beryllium collisions

The hadronic production of dielectrons in the UPSILON region has beenmeasured with a mass resolution of 0.17% using incident protons with momentumof 800 GeV//ital c/. The cross sections of the UPSILON resonances are comparedwith the predictions of a gluon-fusion model. The dielectron continuum is al...

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Veröffentlicht in:	Phys. Rev. D; (United States) 1989-06, Vol.39 (11), p.3516-3519
Hauptverfasser:	Yoshida, T, Adams, MR, Brown, CN, Cooper, WE, Crittenden, JA, Finley, DA, Glass, HD, Gray, R, Hemmi, Y, Hsiung, YB, Hubbard, JR, Imai, K, Jaffe, DE, Jonckheere, AM, Jöstlein, H, Kaplan, DM, Lederman, LM, Luk, KB, Mangeot, P, Maki, A, McCarthy, RL, Miyake, K, Plaag, RE, Rutherfoord, JP, Sakai, Y, Smith, SR, Straub, PB, Tamura, N, Young, KK
Format:	Artikel
Sprache:	eng
Schlagworte:	645103 - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties BARYON REACTIONS BERYLLIUM 9 TARGET BOSONS BOTTOMONIUM CHARGED-PARTICLE REACTIONS CROSS SECTIONS ELECTRONS ELEMENTARY PARTICLES ENERGY RANGE FERMIONS GEV RANGE GEV RANGE 100-1000 GLUON MODEL HADRON REACTIONS HADRONS LEPTONS LINEAR MOMENTUM MASS RESOLUTION MATHEMATICAL MODELS MESONS NUCLEAR REACTIONS NUCLEON REACTIONS PARTICLE MODELS PARTICLE PRODUCTION PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PROTON REACTIONS QUARKONIUM RESOLUTION TARGETS TRANSVERSE MOMENTUM
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Zusammenfassung:	The hadronic production of dielectrons in the UPSILON region has beenmeasured with a mass resolution of 0.17% using incident protons with momentumof 800 GeV//ital c/. The cross sections of the UPSILON resonances are comparedwith the predictions of a gluon-fusion model. The dielectron continuum is alsocompared with the Drell-Yan prediction, and the /ital K/ factor is extracted.The results on the mean transverse momentum of the resonances and that of thecontinuum are also presented.
ISSN:	0556-2821
DOI:	10.1103/physrevd.39.3516