Charmed-meson production in 800-GeV P-P interactions

Thesis/Dissertation · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5397188

Senko, M F

The purpose of this dissertation is to present the results of a study concerning the energy dependence of charmed meson production properties as a test of Quantum Chromodynamics (QCD). This experiment was performed at Fermi National Accelerator Laboratory, using a rapid cycling bubble chamber (LEBC) as a hydrogen target and high resolution vertex detector, in combination with the Fermilab Multiparticle Spectrometer (FMPS). The multiplicity trigger was unbiased, and spectrometer acceptance was good at x{sub F} {ge} 0. A comparison of the results from previous experiments at center of mass energies {radical}s {le} 27 GeV and {radical}s {ge} 53 GeV implies a total charm particle production cross section which rises rapidly as a function of {radical}s. The result of the experiment, {sigma}(D/{bar D}) = 42.7 {plus minus} 7.8 {mu}b at {radical}s = 38 GeV, indicates a slower rise, in agreement with QCD predictions. A maximum likelihood fit to the parameterization of the differential cross section as d{sup 2}{sigma}/dx{sub F}dp{sub {perpendicular}}{sup 2} {approximately} (1 {minus} {vert bar}x{sub F}{vert bar}){sup n}e{sup {minus}bp{sub {perpendicular}}{sup 2}} gives the results n = 8.4{sub {minus}1.9}{sup +2.2}, b= 0.78{sub {minus}0.16}{sup +0.19} (GeV/c){sup {minus}2}, and {l angle}p{perpendicular}{r angle} = 1.1{sub {minus} 0.1}{sup +0.2} GeV/c. When compared with results from the lower energy experiments, these values indicate charm production becoming more central and {l angle}p{perpendicular}{r angle} being consistent with the charmed quark mass. These results are once again consistent with QCD predictions.

• Research Organization: Vanderbilt Univ., Nashville, TN (United States)
• OSTI ID: 5397188
• Country of Publication: United States
• Language: English

Related Subjects

662230 -- Quantum Chromodynamics-- (1992-)
662340* -- Hadron Interactions-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BOSONS
BUBBLE CHAMBERS
CHARM PARTICLES
CHARMED MESONS
COMPARATIVE EVALUATIONS
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DIFFERENTIAL CROSS SECTIONS
ELECTRONIC CIRCUITS
ELEMENTARY PARTICLES
ENERGY RANGE
EVALUATION
FERMILAB ACCELERATOR
FIELD THEORIES
GAS TRACK DETECTORS
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
HADRONS
INFORMATION
INTERACTIONS
MAGNETIC SPECTROMETERS
MAXIMUM-LIKELIHOOD FIT
MEASURING INSTRUMENTS
MESONS
NUCLEON-NUCLEON INTERACTIONS
NUMERICAL SOLUTION
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PROTON-NUCLEON INTERACTIONS
PROTON-PROTON INTERACTIONS
PULSE CIRCUITS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
RADIATION DETECTORS
SPECTROMETERS
SYNCHROTRONS
TESTING
TRIGGER CIRCUITS