Amplitude analysis of Y*(1385) production in the line-reversed reactions:. pi. /sup +/p. -->. K/sup +/Y*(1385) and K/sup -/p. -->. pi. /sup -/Y*(1385) at 7 and 11. 5 GeV/c. [Sigma(1385). -->. lambda pi. ,. lambda. -->. p. pi. /sup -/, angular distribution, helicity--flip and non-flip]

Conference · Tue Aug 01 00:00:00 EDT 1978

OSTI ID:6228596

Ballam, J; Bouchez, J; Carroll, J T

For the first time in one detector measurements were made of the complete decay angular distribution on Y* ..-->.. ..lambda pi.., ..lambda.. ..-->.. p..pi../sup -/ in the two line-reversed reactions: ..pi../sup +/p ..-->.. K/sup +/Y*(1385) and K/sup -/p ..-->.. ..pi../sup -/Y*(1385). The experiment was conducted in the SLAC 1 m rapid cycling bubble chamber (15 Hertz) triggered by electronic detectors and an online algorithm. The extended maximum likelihood method was used to obtain the transversity amplitudes of the Y *(1385). Results are in good agreement with both the quark model and Stodolsky-Sakurai model predictions. Finite helicity nonflip contributions at the Y*vertex observed in these data can be associated with double quark scattering in the forward direction. 15 references.

• Research Organization: Stanford Linear Accelerator Center, CA (USA); Imperial Coll. of Science and Technology, London (UK)
• DOE Contract Number: EY-76-C-03-0515
• OSTI ID: 6228596
• Report Number(s): SLAC-PUB-2175; CONF-780826-7; TRN: 79-011710
• Resource Relation: Conference: 19. conference on high energy physics, Tokyo, Japan, 23 Aug 1978
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
KAON MINUS-PROTON INTERACTIONS
PARTICLE PRODUCTION
PION PLUS-PROTON INTERACTIONS
SIGMA-1385 RESONANCES
HADRONIC PARTICLE DECAY
ANGULAR DISTRIBUTION
EXCHANGE DEGENERACY
GEV RANGE 01-10
GEV RANGE 10-100
HELICITY
KAONS PLUS
LAMBDA PARTICLES
LINEAR MOMENTUM
LINEAR MOMENTUM TRANSFER
PIONS
PIONS MINUS
PROTONS
QUARK MODEL
REGGE POLES
SCATTERING AMPLITUDES
AMPLITUDES
BARYON RESONANCES
BARYONS
BOSONS
COMPOSITE MODELS
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
KAONS
MATHEMATICAL MODELS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
MOMENTUM TRANSFER
NUCLEONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
PSEUDOSCALAR MESONS
RESONANCE PARTICLES
STRANGE PARTICLES
Y RESONANCES
645103* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Interactions & Baryon & Meson Properties
645102 - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties