Measurement of the charged and neutral D meson lifetimes

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

OSTI ID:5196645

Butler, J M

In an exposure of the SLAC Hybrid Facility (SHF) to a backward scattered laser beam, 136 charm events produced in ..gamma..p interactions at 20 GeV have been observed. The SHF 1 m bubble chamber was equipped with a High Resolution Optics camera in order to detect directly the production and decay of charm particles. After imposing rigorous cuts, 48 charged, 50 neutral, and 2 topologically ambiguous decays remain. Using a novel method for estimating the momentum of unconstrained decays, the D meson lifetimes from this sample were measured. The value of R indicates the Spectator Model charm particle decay mechanism is the dominate piece in the D/sup +/-/ and D/sup 0/ decay rates. Limits are placed on additional contributions to the D decay rates from other processes including W-Exchange, Final State Interactions, and Pauli Principle Interference.

• Research Organization: Stanford Univ., CA (USA)
• OSTI ID: 5196645
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
645102 -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Weak Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DATA
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 10-100
HADRONS
INFORMATION
INTERACTIONS
LIFETIME
MESONS
NUMERICAL DATA
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTON-BARYON INTERACTIONS
PHOTON-HADRON INTERACTIONS
PHOTON-NUCLEON INTERACTIONS
PHOTON-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
WEAK PARTICLE DECAY