Nuclear dependence of dimuon production at 800 GeV

Journal Article · Mon May 21 04:00:00 EDT 1990 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.64.2479· OSTI ID:7096738

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; Peng, J C ^[1]; Brown, C N; Cooper, W E; Hsiung, Y B ^[2]; Adams, M R ^[3]; Guo, R; Kaplan, D M ^[4]; McCarthy, R L ^[5]; Danner, G ; Wang, M J ^[6]; Barlett, M L; Hoffmann, G W ^[7]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (US)
2. Fermilab, Batavia, Illinois 60510 (USA)
3. University of Illinois at Chicago, Chicago, Illinois 60680 (USA)
4. Northern Illinois University, DeKalb, Illinois 60115 (USA)
5. State University of New York at Stony Brook, Stony Brook, New York 11794-3800 (USA)
6. Case Western Reserve University, Cleveland, Ohio 44106 (USA) Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
7. University of Texas, Austin, Texas 78712 (USA)

A precise measurement of the atomic-mass dependence of dimuon production induced by 800-GeV protons is reported. Over 450 000 muon pairs with dimuon mass {ital M}{ge}4 GeV were recorded from targets of {sup 2}H, C, Ca, Fe, and W. The ratio of dimuon yield per nucleon for nuclei versus {sup 2}H, {ital R}={ital Y}{sub {ital A}}/{ital Y}{sub 2{ital H}}, is sensitive to modifications of the antiquark sea in nuclei. No nuclear dependence of this ratio is observed over the range of target-quark momentum fraction 0.1{lt}{ital x}{sub {ital t}}{lt}0.3. For {ital x}{sub {ital t}}{lt}0.1 the ratio is slightly less than unity for the heavy nuclei. These results are compared with predictions of models of the European Muon Collaboration effect.

• OSTI ID: 7096738
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 64:21; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
651620 -- Nuclear Properties & Reactions
A=59-89
Experimental
651820 -- Nuclear Properties & Reactions
A=150-189
Experimental
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH METALS
ANNIHILATION
BARYON-BARYON INTERACTIONS
BASIC INTERACTIONS
CALCIUM
CARBON
CROSS SECTIONS
DRELL MODEL
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ELEMENTS
EMC EFFECT
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HYDROGEN
INTERACTIONS
IRON
LEPTONS
LINEAR MOMENTUM
METALS
MUONS
NONMETALS
NUCLEON-NUCLEON INTERACTIONS
PAIR PRODUCTION
PARTICLE INTERACTIONS
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK-ANTIQUARK INTERACTIONS
TRANSITION ELEMENTS
TRANSVERSE MOMENTUM
TUNGSTEN