Search for a T =2 dibaryon

Journal Article · Mon Oct 09 00:00:00 EDT 1989 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.63.1570· OSTI ID:5285652

Parker, B; Seth, K K; Ginsburg, C M; O'Reilly, B; Sarmiento, M; Soundranayagam, R; Trokenheim, S ^[1]

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1. Northwestern University, Evanston, Illinois 60208 (US)

We have made a good-resolution, high-sensitivity search for a {ital T}=2 dibaryon in the missing-mass spectra for the reaction {ital d}({pi}{sup {minus}},{pi}{sup +}){pi}{sup {minus}}nn at 292 MeV. Our results are consistent with there being no resonance peak due to such a state in the mass region 2001--2070 MeV. 95%-confidence upper limits for the integrated cross sections for such a state are presented. It is found that a quasifree model calculation, without final-state interactions, considerably underpredicts the continuum yield in the vicinity of the threshold.

• OSTI ID: 5285652
• Journal Information: Physical Review Letters; (USA), Vol. 63:15; ISSN 0031-9007
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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PION MINUS REACTIONS
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CHARGE EXCHANGE
CROSS SECTIONS
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EXPERIMENTAL DATA
GEV RANGE 01-10
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DELTA BARYONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FIELD THEORIES
GEV RANGE
HADRON REACTIONS
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INELASTIC SCATTERING
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N BARYONS
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