Experimental test of exchange degeneracy in hypercharge exchange reactions at 7 and 11. 5 GeV/c. [Cross sections]

Conference · Sat Jul 01 00:00:00 EDT 1978

OSTI ID:6402503

Baker, P A; Chima, J S; Dornan, P J

The two pairs of line-reversed reactions: ..pi../sup +/p ..-->.. K/sup +/..sigma../sup +/; K/sup -/p ..-->.. ..pi../sup -/..sigma../sup +/ and ..pi../sup +/p ..-->.. K/sup +/Y*(1385); K/sup -/p ..-->.. ..pi../sup -/Y*(1385) at two energies: 7 and 11.5 GeV/c were studied. The experiment was conducted in the SLAC 1 m rapid cycling bubble chamber triggered by electronic detectors and an online algorithm. The cross section excess for the K/sup -/ reactions which has shown exchange degeneracy violations at lower energy is still significant but smaller at 7 GeV/c. At 11.5 GeV/c it is found that both the helicity-flip and non-flip dominated processes are consistent with exchange degeneracy predictions. Polarization measurements of the ..sigma../sup +/ and Y* at both energies support dominance in the production process of exchange degenerate K*(890) vector and K*(1490) tensor trajectories. 9 references

• Research Organization: Imperial Coll. of Science and Technology, London (UK); Stanford Linear Accelerator Center, CA (USA)
• DOE Contract Number: EY-76-C-03-0515
• OSTI ID: 6402503
• Report Number(s): SLAC-PUB-2169; IC/HEMP-78/21; CONF-780826-8; TRN: 79-004396
• 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
HYPERCHARGE
K-1420 RESONANCES
PARTICLE PRODUCTION
K-892 RESONANCES
KAON MINUS-PROTON INTERACTIONS
EXCHANGE INTERACTIONS
PION PLUS-PROTON INTERACTIONS
SIGMA PLUS
POLARIZATION
SIGMA-1385 RESONANCES
HADRONIC PARTICLE DECAY
CROSS SECTIONS
EXCHANGE DEGENERACY
HELICITY
BARYON RESONANCES
BARYONS
BOSONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
HYPERONS
INTERACTIONS
K RESONANCES
KAON-NUCLEON INTERACTIONS
KAON-PROTON INTERACTIONS
MESON RESONANCES
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION-NUCLEON INTERACTIONS
PION-PROTON INTERACTIONS
RESONANCE PARTICLES
SIGMA PARTICLES
STRANGE PARTICLES
TENSOR MESONS
VECTOR MESONS
Y RESONANCES
645104* - High Energy Physics- Particle Interactions & Properties-Experimental- Strong Meson-Induced Interactions- (-1987)