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23 April 2024 |
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Can Doubly Strange Dibaryon Resonances be Discovered at RHIC? | | S. D. Paganis
; G. W. Hoffmann
; R. L. Ray
; J.-L. Tang
; T. Udagawa
; R. S. Longacre
; | | Date: |
8 Oct 1999 | | Journal: | Phys.Rev. C62 (2000) 024906 | | Subject: | nucl-ex | | Affiliation: | The University of Texas at Austin), R. S. Longacre (Brookhaven National Laboratory | | 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. | | Source: | arXiv, nucl-ex/9910007 | | Services: | Forum | Review | PDF | Favorites | |
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