Can doubly strange dibaryon resonances be discovered at RHIC?

Journal Article · Tue Aug 01 04:00:00 EDT 2000 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.62.024906· OSTI ID:20217266

Paganis, S D ^[1]; Hoffmann, G W ^[1]; Ray, R L ^[1]; Tang, J -L ^[1]; Udagawa, T ^[1]; Longacre, R S ^[2]

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1. Department of Physics, The University of Texas at Austin, Austin, Texas 78712 (United States)
2. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

The baryon-baryon continuum invariant mass spectrum generated from relativistic nucleus + nucleus collision data may reveal the existence of doubly strange dibaryons not stable against strong decay if they lie within a few MeV of threshold. Furthermore, since the dominant component of these states is a superposition of two color-octet clusters which can be produced intermediately in a color-deconfined quark-gluon plasma (QGP), an enhanced production of dibaryon resonances could be a signal of QGP formation. A total of eight, doubly strange dibaryon states are considered for experimental search using the STAR detector (solenoidal tracker at RHIC) at the new Relativistic Heavy Ion Collider (RHIC). These states may decay to {lambda}{lambda} and/or p{xi}{sup -}, depending on the resonance energy. STAR's large acceptance, precision tracking and vertex reconstruction capabilities, and large data volume capacity, make it an ideal instrument to use for such a search. Detector performance and analysis sensitivity are studied as a function of resonance production rate and width for one particular dibaryon which can directly strong decay to p{xi}{sup -}, but not {lambda}{lambda}. Results indicate that such resonances may be discovered using STAR if the resonance production rates are comparable to coalescence model predictions for dibaryon bound states. (c) 2000 The American Physical Society.

• OSTI ID: 20217266
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 62; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLOR MODEL
DIBARYONS
EXPERIMENTAL DATA
HEAVY ION REACTIONS
QUARK-GLUON INTERACTIONS
RESONANCE PARTICLES
STRANGE PARTICLES
THEORETICAL DATA