Nuclear effects in Drell-Yan and quarkonium production in proton-nucleus collisions

Conference · Mon Jan 01 04:00:00 EST 1990

OSTI ID:6053395

Peng, J C; Alde, D M; Baer, H W; Carey, T A; Garvey, G T; Klein, A; Lee, C; Leitch, M J; Lillberg, J W; McGaughey, P L; Mishra, C S; Moss, J M ^[1]; Brown, C N; Cooper, W E; Hsiung, Y B ^[2]; Adams, M R ^[3]; Guo, R; Kaplan, D M ^[4]; McCarthy,

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1. Los Alamos National Lab., NM (USA)
2. Fermi National Accelerator Lab., Batavia, IL (USA)
3. Illinois Univ., Chicago, IL (USA)
4. Northern Illinois Univ., De Kalb, IL (USA)

A precise measurement of the atomic mass dependence of dimuon production induced by 800 GeV protons incident on targets of {sup 2}H, C, Ca, Fe, and W is reported. The relative Drell-Yan yield per nucleon, R = Y{sub A}/Y{sub 2{sub H}}, is sensitive to modifications of the antiquark sea in nuclei. No effect is seen for the range of target-quark momentum fraction, 0.1 < x{sub t} < 0.3. For x{sub t} < 0.1 the ratio is slightly less than unity for the heavy nuclei. These results are compared with the predictions of EMC models. A depletion of the yield per nucleon from heavy nuclei is observed for both J/{psi} and {psi}{prime} production. This depletion exhibits a strong dependence of x{sub F} and p{sub t}. Within experimental errors the depletion is the same for the J/{psi} and the {psi}{prime}. 41 refs., 6 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: DOE; USDOE, Washington, DC (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6053395
• Report Number(s): LA-UR-91-761; CONF-9005233--12; ON: DE91009940
• Country of Publication: United States
• Language: English

Related Subjects

645100* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental
653002 -- Nuclear Theory-- Nuclear Matter
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON-BARYON INTERACTIONS
BOSONS
CHARMONIUM
CROSS SECTIONS
DRELL MODEL
ELEMENTARY PARTICLES
FUNCTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
J PSI-3097 MESONS
LINEAR MOMENTUM
MASS SPECTRA
MATTER
MESONS
MUON PAIRS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PROTON-NUCLEON INTERACTIONS
QUARK MATTER
QUARKONIUM
SPECTRA
STRUCTURE FUNCTIONS
TRANSVERSE MOMENTUM
VECTOR MESONS