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      Can Doubly Strange Dibaryon Resonances be Discovered at RHIC?

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          Abstract

          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 proton-Cascade-minus, 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 proton-Cascade-minus 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.

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          Most cited references6

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          Perhaps a Stable Dihyperon

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            Review of Particle Physics

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                Author and article information

                Journal
                08 October 1999
                2000-06-12
                Article
                10.1103/PhysRevC.62.024906
                nucl-ex/9910007
                5ea1f91d-63f7-4340-96b6-e8287226b88b
                History
                Custom metadata
                Phys.Rev. C62 (2000) 024906
                28 pages, 5 figures, revised version
                nucl-ex

                Nuclear physics
                Nuclear physics

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