The probability of hypernucleus production in high-energy heavy-ion collisions

Asai, Fumio; Bandō, Hiroharu; Sano, Mitsuo

doi:10.1016/0370-2693(84)90939-0

Cited by 33 publications

(38 citation statements)

References 8 publications

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“…Those first experimental estimations of the production cross section do not agree on the magnitude of the cross sections, and a clear conclusion could not be stated due to the small number of light hypernuclei observed in both cases. Those rough estimations were then compared with the theoretical calculations within a simple coalescence model [8,[12][13][14]. However, the identification of produced hypernuclei was ambiguous since the invariant mass of the final states was not measured.…”

Section: Introductionmentioning

confidence: 99%

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Hypernuclear production cross section in the reaction of 6Li + 12C at 2 A GeV

et al. 2015

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Hypernuclear production cross sections have been deduced for the first time with induced reaction of heavy ion beam on fixed target and by means of the invariant mass method by the HypHI Collaboration exploiting the reaction of 6 Li + 12 C at 2 A GeV or √ s N N = 2.70 GeV. A production cross section of 3.9 ± 1.4 μb for 3 H and of 3.1 ± 1.0 μb for 4 H respectively in the projectile rapidity region was inferred as well as the total production cross section of the hyperon was measured and found to be equal to 1.7 ± 0.8 mb. A global fit based on a Bayesian approach was performed in order to include and propagate statistical and systematic uncertainties. Production ratios of 3 H/ 4 H, 3 H/ and 4 H/ were included in the inference procedure. The strangeness population factors S 3 and S 4 of 3 H and 4 H respectively were extracted. In addition, the multiplicities of the hyperon, 3 H, and 4 H together with the rapidity and transversal momentum density distributions of the observed hypernuclei were extracted and reported.

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Section: Introductionmentioning

confidence: 99%

“…Yet the extremely scarce experimental data currently available do not restrain those models. One has to also notice that first theoretical work from [8,[12][13][14] and updated calculations [22][23][24] differ by order of magnitude on the prediction of the hypernuclear production cross sections.…”

Section: Introductionmentioning

confidence: 99%

Hypernuclear production cross section in the reaction of 6Li + 12C at 2 A GeV

et al. 2015

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“…In addition, there are special light hypernuclei of interest, whose properties are dictated by their unusual structure [29], e.g., nuclei with the hyperon halo ( 3 H); neutron-rich hypernuclei; and nuclei with an unstable core, where the hyperon is a sort of "glue" ensuring stability ( 6 H, 6 He, 8 He). Recently at the BNL Relativistic Heavy Ion Collider (RHIC), the observation of (anti)hypertritons has been reported in nuclear collisions [30,31].…”

Section: Introductionmentioning

confidence: 99%

“…Since the mechanism of the heavy ion induced hypernuclear reaction is not well understood, this field of research has attracted mainly theoretical interest; see, e.g., Refs. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Model for hypernucleus production in heavy ion collisions

Pop

Gupta

2010

Phys. Rev. C

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We estimate the production cross sections of hypernuclei in projectile like fragment (PLF) in heavy ion collisions. The discussed scenario for the formation cross section of hypernucleus is: (a) Lambda particles are produced in the participant region but have a considerable rapidity spread and (b) Lambda with rapidity close to that of the PLF and total momentum (in the rest system of PLF) up to Fermi motion can then be trapped and produce hypernuclei. The process (a) is considered here within Heavy Ion Jet Interacting Generator HIJING-BBbar model and the process (b) in the canonical thermodynamic model (CTM). We estimate the production cross-sections for light hypernuclei for C + C at 3.7 GeV total nucleon-nucleon center of mass energy and for Ne+Ne and Ar+Ar collisions at 5.0 GeV. By taking into account explicitly the impact parameter dependence of the colliding systems, it is found that the cross section is different from that predicted by the coalescence model and large discrepancy is obtained for 6_He and 9_Be hypernuclei.Comment: 9 pages, 4 figures, 3 tables, revtex4, added reference

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“…Cross sections for single-and double-A hypernuclei have been estimated in [14] and have recently been measured in [15]. The properties of multihypernuclei [13,16] are still one of the least-explored, Open questions in hypernuclear research.…”

Section: Introductionmentioning

confidence: 99%

Metastable exotic multihypernuclear objects

1992

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Relativistic heavy ion collisions constitute a prolific source of hyperons: tens of hyperons per event are predicted at energies E 1 10 GeV/nucleon, providing a scenario for the formation of metastable exotic multihypernuclear objects. They may exhibit exceptional properties: bound neutral (e.g., 4 M : l , ''M&, pure A droplets, 8 A ) and even negatively charged composites objects with positive baryon number ie.g., 4~: 2 -, 6M2" 2A25 ) could be formed in rare events. Such negative nuclei can easily be identified in a magnetic spectrometer. They could be considerably more abundant than antinuclei of the same A. We use the relativistic meson-baryon field theory-which gives an excellent description of normal nuclear and single-A hypernuclear properties-to calculate the rich spectrum of such exotic objects, their stability, and their structure. We also find solutions for a large variety of bound short-lived nuclei (e.g., 8~2~2 "2 n , 2 n P ), which may decay strongly via formation of cascade ( E ) particles. Multi-E hypernuclei are also evaluated. A variety of potential candidates for such metastable exotic nuclei is presented. It turns out that the properties of such exotic multihypernuclear objects reveal quite similar features as the strangelet proposed as a unique signature for quark-gluon plasma formation in heavy ion collisions. PACS numberis): 25.75. +r, 21.80. + a

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The probability of hypernucleus production in high-energy heavy-ion collisions

Cited by 33 publications

References 8 publications

Hypernuclear production cross section in the reaction of 6Li + 12C at 2 A GeV

Hypernuclear production cross section in the reaction of 6Li + 12C at 2 A GeV

Model for hypernucleus production in heavy ion collisions

Metastable exotic multihypernuclear objects

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