Energy dependence of hypernucleus production in high-energy nuclear collision

Wakai, M.

doi:10.1016/0375-9474(92)90713-t

Cited by 11 publications

(23 citation statements)

References 2 publications

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“…11 the good quantitative agreement to the total cross section data at 120, 150 and 180 MeV for the 16 O, 40 Ca, 103 Rh and 208 Pb nuclei is demonstrated. Only for the 16 O nucleus and the low energy of 120 MeV we find statistically significant discrepancies.…”

Section: Low-energy Pionsmentioning

confidence: 55%

“…The reason for selecting very light systems is the easier identification of hypernuclei via the weak decay of a Λ hyperon into a proton and a negative pion. In earlier theoretical studies, see, e.g., [208], cross sections of the order of only few microbarn (µb) were predicted, which can be easily understood: in collisions between very light systems, such as 12 C+ 12 C at 2 AGeV, secondary re-scattering events inside the spectator matter, which are important for producing low energetic hyperons, are rare processes due to the small interaction volume. The situation is different in collisions between heavy nuclei due to the high production rate of strangeness and many secondary scattering events.…”

Section: Reactions Induced By Protons and Heavy Ions At Sis Energiesmentioning

confidence: 99%

“…At higher (∼ 1 GeV) energies, the sequential mechanism becomes insufficient to account for the reaction cross section [159,160]. Extensive experimental studies performed at LAMPF has lead to high precision data for doubledifferential cross sections on 4 3 He [161] and heavier nuclei ( 16 O, 40 Ca, 208 Pb) [162] for kinetic energies of the incoming pions of E kin = 120-270 MeV.…”

Section: Low-energy Pionsmentioning

confidence: 99%

“…In fig. 12 we show dσ/dΩ for DCX at E kin = 120 MeV, 150 MeV and 180 MeV on 16 O, 40 Ca and 208 Pb as functions of the scattering angle, θ, in the laboratory frame for both the fulland parallel-ensemble schemes. The uncertainties are well under control except at very small and very large angles, where statistics is very scarce.…”

Section: Low-energy Pionsmentioning

confidence: 99%

“…For the positive pions this causes an enhancement of DCX processes at the surface, so the pions do not need to penetrate deeply for this reaction. In [138] also the effects of a neutron skin on the DCX cross sections were explored by comparing results with and without a neutron skin for the density distribution in 208 Pb. A significant increase of about 35 % was found for the reaction π + Pb → π − Pb for the density distribution with a neutron skin.…”

Section: Low-energy Pionsmentioning

confidence: 99%

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Transport-theoretical description of nuclear reactions

et al. 2012

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In this review we first outline the basics of transport theory and its recent generalization to offshell transport. We then present in some detail the main ingredients of any transport method using in particular the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) implementation of this theory as an example. We discuss the potentials used, the ground state initialization and the collision term, including the in-medium modifications of the latter. The central part of this review covers applications of GiBUU to a wide class of reactions, starting from pion-induced reactions over proton and antiproton reactions on nuclei to heavy-ion collisions (up to about 30 AGeV). A major part concerns also the description of photon-, electron-and neutrino-induced reactions (in the energy range from a few 100 MeV to a few 100 GeV). For this wide class of reactions GiBUU gives an excellent description with the same physics input and the same code being used. We argue that GiBUU is an indispensable tool for any investigation of nuclear reactions in which final-state interactions play a role. Studies of pion-nucleus interactions, nuclear fragmentation, heavy-ion reactions, hypernucleus formation, hadronization, color transparency, electronnucleus collisions and neutrino-nucleus interactions are all possible applications of GiBUU and are discussed in this article.

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Section: Low-energy Pionsmentioning

confidence: 55%

Section: Reactions Induced By Protons and Heavy Ions At Sis Energiesmentioning

confidence: 99%

Section: Low-energy Pionsmentioning

confidence: 99%

Section: Low-energy Pionsmentioning

confidence: 99%

Section: Low-energy Pionsmentioning

confidence: 99%

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Transport-theoretical description of nuclear reactions

et al. 2012

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A hypernuclear program for the Nuclotron accelerator

et al. 1995

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Formation of double-Λ hypernuclei at PANDA

et al. 2012

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We study the formation of single-and double-Λ hypernuclei in antiproton-induced reactions relevant for the forthcoming PANDA experiment at FAIR. We use the Giessen Boltzmann-Uehling-Uhlenbeck (GiBUU) transport model with relativistic mean-fields for the description of non-equilibrium dynamics and the statistical multifragmentation model (SMM) for fragment formation. This combined approach describes the dynamical properties of strangeness and fragments in low energypinduced reactions fairly well. We then focus on the formation of double-Λ hypernuclei in high energyp-nucleus collisions on a primary target including the complementary Ξ-induced reactions to a secondary one, as proposed by the PANDA Collaboration. Our results show that a copious production of double-Λ hyperfragments is possible at PANDA. In particular, we provide first theoretical estimations on the double-Λ production cross section, which strongly rises with decreasing energy of the secondary Ξ-beam.

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Energy dependence of hypernucleus production in high-energy nuclear collision

Cited by 11 publications

References 2 publications

Transport-theoretical description of nuclear reactions

Transport-theoretical description of nuclear reactions

A hypernuclear program for the Nuclotron accelerator

Formation of double-Λ hypernuclei at PANDA

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