An evidence for a possible stable dibaryon

Shahbazian, B.A.; Kechechyan, A.; Tarasov, A; Martynov, A.S.

doi:10.1007/bf01550990

Cited by 26 publications

(10 citation statements)

References 41 publications

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“…The H dibaryon has been searched for in pp collisions (132) and p nucleus annihilations (133), but without the requisite sensitivity. An event attributed to H formation in proton-nucleus collisions has been claimed by Shahbazian et al (134). A triggered emulsion study by Aoki et al (135) is under way at KEK.…”

Section: Shell Model Vs Cluster Description Of �Bementioning

confidence: 84%

Nuclear Systems with Strangeness

Chrien¹,

Dover²

1989

Annu. Rev. Nucl. Part. Sci.

132

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Section: Shell Model Vs Cluster Description Of �Bementioning

confidence: 84%

Nuclear Systems with Strangeness

Chrien¹,

Dover²

1989

Annu. Rev. Nucl. Part. Sci.

132

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“…However, theoretical estimates of its mass have varied widely ranging from deeply bound to unbound, depending on the model or theory used for the calculations [2]. Experimentally, there is no conclusive result yet, although several candidates for an H-dibaryon decay have been reported [5]. Many efforts to search for the H-dibaryon are under way [6] and planned.…”

Section: Introductionmentioning

confidence: 99%

The interaction between H-dibaryons

Sakai

Mori²,

Buchmann

et al. 1997

Nuclear Physics A

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We investigate the interaction between H-dibaryons employing a quark cluster model with a one-gluon-exchange potential and an effective meson exchange potential (EMEP). A deeply-bound state of two H-dibaryons due to the medium range attraction of the EMEP is obtained. The bound H--H system has a size of about 0.8 $\sim$ 0.9 fm because of the short-range repulsion generated by the color-magnetic interaction and the Pauli principle.Comment: 22 pages, LaTeX, 6 epsf files, uses epsf.te

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“…The case of p + 3 He -• (KKir)~t + H was discussed in detail by Guaraldo ( 28 ) at this conference. Note also that an event which could be interpreted as the formation and decay of an H has been reported by Shahbazian efc ai ( 29 ).…”

Section: -Production Of the H Dibaryon In Heavy Ion Collisionsmentioning

confidence: 59%

Strange dibaryon production in relativistic heavy-ion collisions

Dover

1989

Nuov Cim A

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We review theoretical predictions for the masa spectrum of strange dibaryona, with emphasis on 5 = -2 states. In a version of the Callen-Klebanov model appied to dibaryona, the lowest-lying configuration is an SU(3) flavor {10*} with J* = 0 + and iaospin / = 1, in contrast to the six-quark ( 4 has provoked considerable interest, on both the theoretical and experimental sides. There is as yet no conclusive evidence for long-lived objects of such structure, although, as we argue below, the key experiments (i.e., for strangeness S = -2 dibaryons) have not yet been performed. The theoretical issue is the ability of dynamical models (quark bag, soiiton, etc.) to predict the masses and decay modes of multi-quark states beyond the familiar baryons (Q 3 ) or mesons (QQ).Enormous effort has been focused on the search for non-strange dibaryon resonances, since these are accessible through the nucleon-nucleon (NN) or NA channels. We do not review this work here, but rather devote our attention to 5 = -2 dibaryons. For certain quantum numbers, the addition of one or more strange (s) quarks to an assembly of up (u) and down (d) quarks is particularly favorable energetically, and thus the existence of stable or at least long-lived dibaryons becomes a distinct possibility. Some existing proposals to find S = -2 dibaryons employ the double strangeness exchange (K~, K + ) reaction. The rates are low because of the limited intensity of available (or soon to be constructed) K~ beams. Here, we propose an alternative strategy, which utilizes the observed copious production of strange particles in relativistic heavy ion central collisions to produce 5 = -2 dibaryons via a fusion/coalescence mechanism.In Chap. 2, we review theoretical attempts to predict the mass spectrum of S --2 dibaryons, including the six-quark (Q 6 ) bag model and the soiiton model a la Skyrme. These treatments produce quite distinct predictions for the level order, and different consequences for the dibaryon decay modes.In Chap. 3, we specialize the discussion to the 0 + , / = 0 H dibaryon, and we present some estimates of the production rate of the H from an ...

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An evidence for a possible stable dibaryon

Cited by 26 publications

References 41 publications

Nuclear Systems with Strangeness

Nuclear Systems with Strangeness

The interaction between H-dibaryons

Strange dibaryon production in relativistic heavy-ion collisions

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