Dimuon production in proton-antiproton collisions at /sup -/s = 546 GeV

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5196423

Bauer, G

The CERN anti-pp collider, operating at ..sqrt..s = 546 Gev, has opened up a new energy regime. During the 1983 data taking period 108 nb/sup -1/ of muon triggered data were accumulated by the UA1 detector. From this data sample 26 dimuon events were selected by requiring both muons to have p/sub t/ > 3 GeV/c and the scalar sum of the two p/sub t/'s to be larger than 10 GeV/c. The characteristics of these events are presented, and their possible origins are discussed. Five event with high dimuon mass are interpreted as Z/sup 0/ ..-->.. ..mu../sup +/..mu../sup -/ or Z/sup 0/ ..-->.. ..mu../sup +/..mu../sup -/..sigma... Of the lower mass events, nine are likely to arise from semileptonic b or c quark decays, one is probably a J/Psi decay, and five are Drell-Yan or Tau candidates with dimuon masses greater than 10 GeV/c/sup 2/. There are three events with masses between 5 and 7 GeV/c/sup 2/ which are possibly Drill-Yan events, but the rate and their kinematic properties are not in good agreement with that hypothesis. Three events remain, which are classified as isolated like-sign dimuons. One of these events is outstanding by virtue to the high transverse momenta (approx.10 GeV/c) of both of the muons. Monte Carlo calculations indicate that these events are difficult to account for by banti-b production (with or without B/sup 0/-mixing).

• Research Organization: Stanford Univ., CA (USA)
• OSTI ID: 5196423
• Country of Publication: United States
• Language: English

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
BASIC INTERACTIONS
BEAUTY PARTICLES
BOSONS
CERN SPS SYNCHROTRON
CHARM PARTICLES
CROSS SECTIONS
CYCLIC ACCELERATORS
DATA
DECAY
DRELL MODEL
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 100-1000
HADRON-HADRON INTERACTIONS
INFORMATION
INTERACTIONS
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
LEPTONIC DECAY
LEPTONS
LINEAR MOMENTUM
MONTE CARLO METHOD
MUONS
NUCLEON-ANTINUCLEON INTERACTIONS
NUMERICAL DATA
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE INTERACTIONS
PROTON-ANTIPROTON INTERACTIONS
PSI-3105 RESONANCES
RADIATIVE DECAY
SYNCHROTRONS
TRANSVERSE MOMENTUM
WEAK INTERACTIONS
WEAK PARTICLE DECAY
Z NEUTRAL BOSONS