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

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5218426

Ransdell, J T

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
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

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