Latest results from the SLAC charm photoproduction experiment

Journal Article · Tue May 15 04:00:00 EDT 1984 · AIP Conf. Proc.; (United States)

DOI:https://doi.org/10.1063/1.34473· OSTI ID:5959453

Brau, J E

Ninety-one events have been observed with one-hundred seventeen visible charmed particle decays in an exposure of the SLAC Hybrid Facility to a 20 GeV/c backward scattered laser beam. Cuts have been imposed to ensure high and uniform efficiency for finding and interpreting charmed particle decays. Fifty-two events survive the cuts and these contain 23 neutral, 21 charged and 12 charge-neutral ambiguous decays of charmed particles. The charged and neutral lifetimes were determined to be 7.2/sup +2.2//sub -2.0/ x 10/sup -13/ sec and 6.5/sup +2.0//sub -1.7/ x 10/sup -13/ sec, respectively, with a ratio of 1.1/sup +0.7//sub -0.4/. The background from D decays has prevented the identification of F decays. Both pair production and associated production contribute substantially to the charm cross section.

• Research Organization: University of Tennessee, Knoxville, Tennessee 37996
• OSTI ID: 5959453
• Journal Information: AIP Conf. Proc.; (United States), Journal Name: AIP Conf. Proc.; (United States) Vol. 113:1; ISSN APCPC
• Country of Publication: United States
• Language: English

Related Subjects

645101* -- High Energy Physics-- Particle Interactions & Properties-Experimental-- Electromagnetic Interactions & Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BASIC INTERACTIONS
CHARM PARTICLES
CHARMED MESON RESONANCES
CROSS SECTIONS
DECAY
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
GEV RANGE
GEV RANGE 10-100
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
LIFETIME
MESON RESONANCES
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PRODUCTION
PHOTOPRODUCTION
POSTULATED PARTICLES
QUARKS
RESONANCE PARTICLES