Neutral strange-particle production in p̄20Ne reactions at 607 MeV/c

Balestra, F.; Bussa, M. P.; Busso, L.; Fava, L.; Ferrero, L.; Panzieri, D.; Piragino, G.; Tosello, F.; Bendiscioli, G.; Rotondi, A.; Salvini, P.; Zenoni, A.; Batusov, Yu.A.; Falomkin, I.V.; Pontecorvo, G. B.; Sapozhnikow, M.G.; Tretyak, V.I.; Guaraldo, C.; Maggiora, A.; Rizzini, E. Lodi; Haatuft, A.; Halsteinslid, A.; Myklebost, K.; Olsen, J.; Breivik, F.O.; Jacobsen, T.; Sørensen, S.O.

doi:10.1016/0370-2693(87)90526-0

Cited by 36 publications

(6 citation statements)

References 9 publications

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“…The production of strange particles in antiproton annihilation on nuclei has been a challenge to theory since about two decades when the Λ and K 0 S yields and spectra were measured in the series of bubble chamber experiments [1][2][3]. The most intriguing experimental fact is that the yield ratio Λ/K 0 S is very large (> 2) not only for heavy target nuclei (p+ 181 Ta at 4 GeV/c [3]), but even for light ones (p+ 20 Ne at 608 MeV/c [2]). The direct mechanismpp →ΛΛ can only explain less than 20% of the measured Λ production cross section forp+ 181 Ta at 4 GeV/c [4].…”

Section: Introductionmentioning

confidence: 99%

“…In this work, we study strangeness production inp-nucleus collisions at p lab = 0.2 − 15 GeV/c and inp-nucleus annihilation at rest within the microscopic GiBUU transport model [11]. We compare our calculations with all available experimental data [1][2][3]12] on Λ, K 0 S andΛ production for in-flight annihilation ofp on nuclei and with earlier calculations within the INC models [5,13,14]. We also analyse the selected data set of ref.…”

Section: Introductionmentioning

confidence: 99%

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Kaon and hyperon production in antiproton-induced reactions on nuclei

2012

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We study the strangeness production in antiproton-nucleus collisions at the beam momenta from 200 MeV/c to 15 GeV/c within the Giessen Botzmann-Uehling-Uhlenbeck (GiBUU) transport model. The GiBUU model contains a very detailed description of the underlying antinucleon-nucleon cross sections, in-particular, of the strangeness production channels. We compare our calculations with the bubble chamber data on \Lambda- and K^0_S-production in antiproton-nucleus collisions and with the earlier intranuclear cascade calculations. The contributions of the various partial channels to the hyperon production are reported and systematic differences with experiment are discussed. The possible formation of the bound \Lambda- and \Lambda\Lambda-nucleus systems is also considered. Finally, the results on the \Xi-hyperon production are presented in view of the forthcoming experiments with antiproton beams at FAIR.Comment: 44 pages, 15 figures, (new Figs. 5,9,11,12), accepted in Phys. Rev.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kaon and hyperon production in antiproton-induced reactions on nuclei

2012

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“…The data (histograms) are from ref. [4]. Vertical arrows indicate the rapidity of ap-nucleon center-ofmass (c.m.)…”

Section: Resultsmentioning

confidence: 99%

“…At KEK [2,3], the hydrogen bubble chamber measurements have been performed for the K 0 S , Λ andΛ production fromp(4 GeV/c) + 181 Ta. Finally, at LEAR [4], the K 0 S and Λ rapidity yields fromp(607 MeV/c) + 20 Ne interactions have been studied using the streamer chamber filled with a natural 20 Ne gas. Recently, K ± production in annihilation of stoppedp's on p, d, 3 He and 4 He has been measured at LEAR [5] applying the magnetic spectrometer Obelix.…”

Section: Introductionmentioning

confidence: 99%

Strangeness production in antiproton-nucleus collisions

Larionov¹,

Gaitanos²,

Mosel³

2011

Leap 2011

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Antiproton annihilations on nuclei provide a very interesting way to study the behaviour of strange particles in the nuclear medium. In low energyp annihilations, the hyperons are produced mostly by strangeness exchange mechanisms. Thus, hyperon production inpA interactions is very sensitive to the properties of the antikaon-nucleon interaction in nuclear medium. Within the Giessen Boltzmann-Uehling-Uhlenbeck transport model (GiBUU), we analyse the experimental data on Λ and K 0 S production inpA collisions at p lab = 0.2 − 4 GeV/c. A satisfactory overall agreement is reached, except for the K 0 S production inp+ 20 Ne collisions at p lab = 608 MeV/c, where we obtain substantially larger K 0 S production rate. We also study the Ξ hyperon production, important in view of the forthcoming experiments at FAIR and J-PARC.

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“…The interest to strangeness production inp-nucleus interactions was originally related to the mechanism of strangeness enhancement in a quark-gluon plasma (QGP) proposed by Rafelski and Müller in early 80's for relativistic heavy-ion collisions [1]. This idea has driven several experiments at BNL [2,3], LEAR [4] and KEK [5]. Although the following-up theoretical analyses within the intranuclear cascade (INC) models [6,7] seem to support the usual mechanism of strangeness production in terms of binary hadron-hadron collisions, the collected experimental data constitute a very useful base for testing newly developing theoretical models needed in view of forthcoming experiments with antiproton beams at FAIR.…”

Section: Introductionmentioning

confidence: 99%

Strangeness production in antiproton-nucleus annihilation

Larionov

Gaitanos

Lenske

et al. 2012

EPJ Web of Conferences

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Abstract.The results of the microscopic transport calculations ofp-nucleus interactions within a GiBUU model are presented. The dominating mechanism of hyperon production is the strangeness exchange processesKN → Yπ andKN → ΞK. The calculated rapidity spectra of Ξ hyperons are significantly shifted to forward rapidities with respect to the spectra of S = −1 hyperons. We argue that this shift should be a sensitive test for the possible exotic mechanisms ofp-nucleus annihilation. The production of the double Λ-hypernuclei by Ξ − interaction with a secondary target is calculated.

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Neutral strange-particle production in p̄20Ne reactions at 607 MeV/c

Cited by 36 publications

References 9 publications

Kaon and hyperon production in antiproton-induced reactions on nuclei

Kaon and hyperon production in antiproton-induced reactions on nuclei

Strangeness production in antiproton-nucleus collisions

Strangeness production in antiproton-nucleus annihilation

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