Production of hypernuclei in peripheral HI collisions: The HypHI project at GSI

Saito, Takehiko; Nakajima, D.; Rappold, C.; Bianchin, S.; Borodina, O.; Bozkurt, V.; Göküzüm, B.; Kavatsyuk, M.; Kim, E.; Ma, Yue; Maas, F. E.; Minami, S.; Özel-Tashenov, B.; Achenbach, P.; Ajimura, S.; Aumann, T.; Gayoso, C. Ayerbe; Bhang, H.; Caesar, C.; Ertürk, S.; Fukuda, T.; Guliev, E.; Hayashi, Yusaku; Hiraiwa, T.; Hoffmann, J.; Ickert, G.; Ketenci, Z.S.; Khaneft, D.; Kim, M.; Kim, S.; Koch, K.; Kurz, N.; Févre, A. Le; Mizoi, Y.; Moritsu, Manabu; Nagae, T.; Nungesser, L.; Okamura, A.; Ott, W.; Pochodzalla, J.; Sakaguchi, A.; Šako, M.; Schmidt, C.; Sekimoto, M.; Simon, H.; Sugimura, Hitoshi; Takahashi, T.; Tambave, Ganesh Jagannath; Tamura, H.; Trautmann, W.; Voltz, S.; Yokota, Naoki; Yoon, C. J.; Yoshida, Kotaro

doi:10.1016/j.nuclphysa.2012.02.011

Cited by 41 publications

(30 citation statements)

References 17 publications

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“…Thus, the Λ can dynamically probe the nuclear interior as an impurity. However, more accurate and detailed structures for a variety of hypernuclei are still needed to improve our understanding of the strongly-interacting system with a strangeness degree of freedom, and they are being tried to be measured in complementary ways at J-PARC using hadron beams [3], GSI (FAIR) using heavy ion beams [4], MAMI [5] and JLab using electron beams [7][8][9][10][11][12][13][14] today.…”

Section: Introductionmentioning

confidence: 99%

High resolution spectroscopic study ofBeΛ10

Gogami¹,

Chen²,

Kawama³

et al. 2016

Phys. Rev. C

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A spectroscopy of a 10 Λ Be hypernucleus was carried out at JLab Hall C using the (e, e ′ K + ) reaction. A new magnetic spectrometer system (SPL+HES+HKS), specifically designed for high resolution hypernuclear spectroscopy, was used to obtain an energy spectrum with a resolution of ∼ 0.78 MeV (FWHM). The well-calibrated spectrometer system of the present experiment using p(e, e ′ K + )Λ,Σ 0 reactions allowed us to determine the energy levels, and the binding energy of the ground state peak (mixture of 1 − and 2 − states) was obtained to be B Λ = 8.55 ± 0.07(stat.) ± 0.11(sys.) MeV. The result indicates that the ground state energy is shallower than that of an emulsion study by about 0.5 MeV which provides valuable experimental information on Charge Symmetry Breaking (CSB) effect in the ΛN interaction.

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Section: Introductionmentioning

confidence: 99%

High resolution spectroscopic study ofBeΛ10

Gogami¹,

Chen²,

Kawama³

et al. 2016

Phys. Rev. C

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“…The above partial differentiations were calculated event by event in the Monte Carlo simulation and their mean values for the typical reactions p(e, e ′ K + )Λ, 7 Li(e, e ′ K + ) 7 Λ He, and 12 C(e, e ′ K + ) 12 Λ B are summarized in Table X. If all of the variables are assumed to be independent from each other, the intrinsic missing-mass resolution ∆M int HYP is obtained to be:…”

Section: A Intrinsic Mass Resolutionmentioning

confidence: 99%

“…However, more precise and systematic measurements are needed to deepen our understanding of the ΛN interaction. Today, scientists investigate Λ hypernuclei with various types of beams: 1) hadron beams at the Japan Proton Accelerator Research Complex (J-PARC) [4][5][6], 2) heavy-ion beams at GSI [7][8][9], 3) heavy-ion colliders at the Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider (RHIC) [10] and the CERN Large Hadron Collider (LHC) [11], and 4) electron beams at the Mainz Mi-crotron (MAMI) [12][13][14] and the Thomas Jefferson National Accelerator Facility (JLab) [15][16][17][18]. These different reactions are complementary and allow us to use their sensitivities to study particular nuclear features of interest.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, hypernuclei of A = 3, 4 were studied in an experiment with a heavy-ion beam impinging on a fixed target at GSI using the invariant-mass technique [7][8][9]. Also, observations of hypertriton ( 3 Λ H) and anti-hypertriton [ 3 Λ H ( 2 H + Λ)] nuclei were reported by the STAR Collaboration at RHIC [10] and the ALICE Collaboration at LHC [11] using heavy-ion collisions.…”

Section: Introductionmentioning

confidence: 99%

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Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′
Gogami
¹
,
Chen
²
,
Fujii
³

et al. 2018
Nuclear Instruments and Methods in Physics Research Section A:
12
0
6
0
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The missing-mass spectroscopy of Λ hypernuclei via the (e, e ′ K + ) reaction has been developed through experiments at JLab Halls A and C in the last two decades. For the latest experiment, E05-115 in Hall C, we developed a new spectrometer system consisting of the HKS and HES; resulting in the best energy resolution (∆E ≃ 0.5-MeV FWHM) and BΛ accuracy (∆BΛ ≤ 0.2 MeV) in Λhypernuclear reaction spectroscopy. This paper describes the characteristics of the (e, e ′ K + ) reaction compared to other reactions and experimental methods. In addition, the experimental apparatus, some of the important analyses such as the semi-automated calibration of absolute energy scale, and the performance achieved in E05-115 are presented. II. MISSING-MASS SPECTROSCOPY WITHTHE (e, e ′ K + ) REACTION Λ hypernuclei were first found in nuclear emulsions that were exposed to cosmic rays [19]. Later, the Λ binding energies B Λ , defined in Eq. (17), of A ≤ 15 hypernuclei were obtained in experiments with nuclear emulsions exposed to mesic beams such as K − [20]. A typical accuracy on the B Λ determination is approximately ∆B Λ ≤ 0.1 MeV including systematic errors. Except for a few cases, emulsion experiments were able to determine only the ground-state B Λ as they derived the B Λ by tracing weak decay processes of Λ hypernuclei which take a longer time than deexcitations emitting γ-rays and neutrons. In addition, with the emulsion technique, the complexity of decay sequences from heavier hypernuclei prevented B Λ measurements with the mass numbers larger

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“…Since the first observation of Λ-hypernuclide in nuclear multifragmentation reactions induced by cosmic rays in 1950s [5], a remarkable progress has been obtained in producing hypernuclides via different reaction mechanism, such as hadron (pion, K ± , proton, antiproton) induced reactions, bombarding the atomic nucleus with high-energy photons or electrons, and fragmentation reactions with high energy heavy-ion collisions. Experimental collaborations of nuclear physics facilities in the world have started or planned to investigate hypernuclei and their properties, e.g., PANDA [6], FOPI/CBM and Super-FRS/NUSTAR [7] at FAIR (GSI, Germany), STAR at RHIC (BNL,USA) [8], ALICE at LHC (CERN) [9], NICA (Dubna, Russia) [10], J-PARC (Japan) [11], HIAF (IMP, China) [12]. In these laboratories, the strangeness nuclear physics is to be concentrated on the isospin degree of freedom (neutron-rich/proton-rich hypernuclei), multiple strangeness nucleus, anti hypernucleus, high-density hadronic matter with strangeness.…”

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confidence: 99%

Strangeness and hypernuclear production in fragmentation reactions induced by antikaons

Zhu

2020

Phys. Rev. C

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Formation mechanism of hyperfragments with strangeness s=-1 and s=-2 in collisions of antikaons on nuclei has been investigated within a microscopic transport model. Dynamics of pseudoscalar mesons and hyperons is modeled within the transport model, in which all possible reaction channels for creating hyperons such as the elastic scattering, resonance production and decay, strangeness exchange reaction and direct strangeness production in meson-baryon and baryon-baryon collisions have been included. A coalescence approach is developed for constructing hyperfragments in phase space and the decay process is described with a statistical approach. It is found that the Ξ − production is correlated to the K + formation and the hyperons Λ and Σ are created within a broad rapidity region. The production cross sections of nucleonic fragments and hyperfragments weakly depends on the incident momentum. The yields of Λ− hyperfragments are the six order of magnitude of Ξ − − hyperfragments.Inclusion of the strangeness degree of freedom in nuclear medium extends the research activities in nuclear physics, in particular on the issues of the nuclear structure of hypernucleus and kaonic nucleus, hyperon-nucleon and hyperon-hyperon interactions, probing the in-medium properties of hadrons [1,2]. Moreover, hadrons with strangeness as essential ingredients influence the highdensity nuclear equation of state (EOS). The strangeness constitution in dense matter softens

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Production of hypernuclei in peripheral HI collisions: The HypHI project at GSI

Cited by 41 publications

References 17 publications

High resolution spectroscopic study ofBeΛ10

High resolution spectroscopic study ofBeΛ10

Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′
Gogami
¹
,
Chen
²
,
Fujii
³

et al. 2018
Nuclear Instruments and Methods in Physics Research Section A:
12
0
6
0
View full text Add to dashboard Cite

Strangeness and hypernuclear production in fragmentation reactions induced by antikaons

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Production of hypernuclei in peripheral HI collisions: The HypHI project at GSI

Cited by 41 publications

References 17 publications

High resolution spectroscopic study ofBeΛ10

High resolution spectroscopic study ofBeΛ10

Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′Gogami1, Chen2, Fujii3 et al. 2018Nuclear Instruments and Methods in Physics Research Section A: 12060View full textAdd to dashboardCite

Strangeness and hypernuclear production in fragmentation reactions induced by antikaons

Contact Info

Product

Resources

About

Experimental techniques and performance of Λ-hypernuclear spectroscopy with the (e,e′
Gogami
¹
,
Chen
²
,
Fujii
³

et al. 2018
Nuclear Instruments and Methods in Physics Research Section A:
12
0
6
0
View full text Add to dashboard Cite