A precision measurement of the A-dependence of dimuon production in proton-nucleus collisions at 800 GeV/c

Miscellaneous · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5260976

Wang, Mingjer

Precision measurements of the A-dependence of the reaction p + A {yields} {mu}{sup +} {mu}{sup {minus}} + X at 800 GeV/c are reported in this thesis. Data were taken at Fermilab (E772) using a modified version of the large dimuon spectrometer in the Meson-East beamline. A total of 6 {times} 10{sup 5} muon spectrometer in the Meson-East beamline. A total of 6 {times} 10{sup 5} muon pairs were recorded for targets of D, C, Ca, Fe, and W. The kinematic region spanned by the data corresponds to a dimuon invariant mass of 3 {le} M{sub {mu}}{sup +}{mu}{sup {minus}} {le} 14 GeV, a Feynman-x of {minus}0.1 {le} x{sub F} {le} 0.7, and a target parton momentum fraction of 0.03 {le} x{sub 2} {le} 0.30. Results are presented on the ratios of cross sections for nuclear targets relative to deuterium for et Drell-Yan process and for the production of J/{psi}, {psi}{prime}, and {Upsilon} quarkonia. These ratios are presented as functions of variables P{sub T} and x{sub F}, and versus x{sub 1} and x{sub 2} for the Drell-Yan process. Nuclear depletion at low-x{sub 2} is observed for the first time in the Drell-Yan process. No nuclear enhancement of the antiquark distribution is observed in the region x{sub 2} {ge} 0.1. The data give tight constraints on models developed to explain nuclear medium effects in deep inelastic lepton scattering (EMC effect). Specifically, published models that have postulated a pion excess and 6-quark clusters are ruled out. The A-dependent behaviors on x{sub F} and P{sub T} for J/{psi},{psi}{prime}, and {Upsilon} production are also reported and compared with previous experiments. Substantial nuclear depletions are observed in both the x{sub F} and P{sub T} dependence.

• Research Organization: Case Western Reserve Univ., Cleveland, OH (United States)
• OSTI ID: 5260976
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
MUONS
PAIR PRODUCTION
CROSS SECTIONS
DEEP INELASTIC SCATTERING
DRELL MODEL
GEV RANGE 100-1000
MAGNETIC SPECTROMETERS
PARTON MODEL
PROTON-NUCLEON INTERACTIONS
QUARKONIUM
TARGETS
TRANSVERSE MOMENTUM
BARYON-BARYON INTERACTIONS
COMPOSITE MODELS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
LINEAR MOMENTUM
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NUCLEON-NUCLEON INTERACTIONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
SCATTERING
SPECTROMETERS
662340* - Hadron Interactions- (1992-)