Charmed meson lifetimes from 20 GeV photoproduction

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:6447801

Brau, J E

A sample of 134 events containing 159 visible multiprong charm decays has been obtained from the 20 GeV charm photoproduction experiment at the SLAC Hybrid Facility. Following a selection procedure which ensures high and uniform detection efficiency for selected events, 47 charged, 46 neutral and five topologically ambiguous decays remain. These decays yield preliminary lifetimes of ..pi../sub D/sup +-// = (9.2 +- 1.5 +- 0.5) x 10/sup -13/ secs ..pi../sub D//sup 0/ approx. = (6.1 +- 1.1 +- 0.4) x 10/sup -13/ secs and a ratio (phi/sub D/sup +-//)/(tau/sub D/sup 0//) = 1.5/sub -0.3//sup +0.6/ +- 0.1. One fully reconstructed four-body D/sup 0/ decay has a proper flight time of 55 x 10/sup -13/ seconds. 5 refs., 4 figs.

• Research Organization: Tennessee Univ., Knoxville (USA)
• DOE Contract Number: AS05-76ER03956
• OSTI ID: 6447801
• Report Number(s): CONF-850171-3; ON: DE86003161
• 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
BOSONS
CHARM PARTICLES
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 PRODUCTION
PHOTOPRODUCTION
PSEUDOSCALAR MESONS