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Strong and weak production of beauty and charm at the CERN p anti p collider

Thesis/Dissertation ·
OSTI ID:5218426
Beauty and charm production has been studied in proton-antiproton collisions at {radical}s = 630 GeV with the UA1 detector at the CERN collider. Clear evidence for strong production of b- and c-quarks has been obtained. The feasibility of observing hadronic decays of the W and Z intermediate vector bosons in the channels W {yields} cs, Z {yields} cc, bb was investigated. Beauty and charm was identified from their semileptonic decays by the presence of a muon in or near a jet. The analysis was performed on a sample of 20,000 muon trigger events containing jets in which the reconstructed muon has a transverse momentum greater than 6 GeV/c. The integrated luminosity of the sample was 573 nb{sup {minus}1}. The detailed kinematics of the muon-jet events are in excellent agreement with the predictions of QCD for beauty and charm strong production. The QCD expectations were calculated with the ISAJET Monte Carlo in conjunction with a full simulation of the UA1 detector. No evidence for W/Z {yields} c/b was observed in the invariant mass distribution of the jet-jet-{mu}-{upsilon} system. The mass resolution achieved was {plus minus}20%. The measured strong beauty and charm cross sections imply a signal to noise ratio of 1/50 for standard model W and Z cross sections.
Research Organization:
California Univ., Riverside, CA (USA)
OSTI ID:
5218426
Country of Publication:
United States
Language:
English

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Related Subjects

645102* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
645103 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Strong Interactions & Baryon & Meson Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCELERATORS
BARYON-BARYON INTERACTIONS
BEAUTY PARTICLES
BOSONS
CERN SPS SYNCHROTRON
CHARM PARTICLES
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FIELD THEORIES
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
JET MODEL
MATHEMATICAL MODELS
MONTE CARLO METHOD
MULTIPLE PRODUCTION
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SYNCHROTRONS
W MINUS BOSONS
W PLUS BOSONS
WEAK HADRONIC DECAY
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS