Observation of D sub s sup + r arrow K sup 0 K sup + and D sub s sup + r arrow K sup 0 K sup + and an upper limit on D sub s sup + r arrow K sup 0. pi. sup +

Journal Article · Mon Sep 18 00:00:00 EDT 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.1211· OSTI ID:5461965

Adler, J; Bai, Z; Becker, J J; Blaylock, G T; Bolton, T; Brient, J; Brown, J S; Bunnell, K O; Burchell, M; Burnett, T H; others, and

We report the first observation of the decay {ital D}{sub {ital s}}{sup +}{r arrow}{bar K}{sup 0}{ital K}{sup +} and a new measurement of the decay {ital D}{sub {ital s}}{sup +}{r arrow}{ital {bar K}} *(892){sup 0}{ital K}{sup +}. The data were collected at {radical}{ital s}=4.14 GeV with the Mark III detector at the SLAC {ital e}{sup +}{ital e}{sup {minus}} storage ring at SPEAR. We obtain the relative branching fractions {ital B}({ital D}{sup +}{sub {ital s}}{r arrow}{ital {bar K}}{sup 0}{ital K}{sup +}/ {ital B}{ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +})=0.92{plus minus}0.32{plus minus}0.20 and {ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{ital {bar K}}{sup *0}{ital K}{sup +})/ {ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +})=0.84{plus minus}0.30{plus minus}0.22, using our new determination of {sigma}{ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +}). A search for the Cabibbo-suppressed decay {ital D}{ital s}{sup +}{r arrow}{ital K}{sup 0}{pi}{sup +} yields a limit {ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{ital K}{sup 0}{pi}{sup +})/{ital B}({ital D}{sub {ital s}}{sup +}{r arrow}{phi}{pi}{sup +}){lt}0.21 at the 90% confidence level.

• OSTI ID: 5461965
• Journal Information: Physical Review Letters; (USA), Vol. 63:12; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
D PLUS MESONS
WEAK HADRONIC DECAY
BRANCHING RATIO
CABIBBO ANGLE
EXPERIMENTAL DATA
GEV RANGE 01-10
KAONS NEUTRAL
KAONS PLUS
MASS
MONTE CARLO METHOD
PIONS PLUS
QUANTUM CHROMODYNAMICS
SPEAR
TIME-OF-FLIGHT METHOD
BOSONS
CHARM PARTICLES
CHARMED MESONS
D MESONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
FIELD THEORIES
GEV RANGE
HADRONS
INFORMATION
KAONS
MESONS
NUMERICAL DATA
PARTICLE DECAY
PIONS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
WEAK PARTICLE DECAY
645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties