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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 ·
OSTI ID:6228596
; ;

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
Country of Publication:
United States
Language:
English

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Related Subjects

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