Production of hypernuclei in a 2.1 GeV/nucleon oxygen beam

Nield, K.; Bowen, T.; Cable, G.D.; Delise, D. A.; Jenkins, E. W.; Kalbach, R. M.; Noggle, R. Carl; Pifer, A. E.

doi:10.1103/physrevc.13.1263

Cited by 58 publications

(40 citation statements)

References 8 publications

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“…The first attempt to produce hypernuclei in the projectile rapidity regime was made with 16 O beams at 2.1 A GeV on a polyethylene target [9] estimating a hypernuclear cross section of the order of μb. Later, in the reaction of a beam of 4 He at 3.7 A GeV and 7 Li at 3.0 A GeV on a polyethylene target the cross section of 4 H of 0.4 μb was estimated [10,11].…”

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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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%

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

et al. 2015

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“…[39] we have discussed hypernucleus 6 Λ Li in terms of an extended supermultiplet scheme which combines the 1s and 1p orbitals, and classifies the nuclear and hypernuclear states by Young tableaux [ f ]. The lower state has symmetry [41] for its nuclear core, so its break-up to 5 Λ He+p or to 5 Li+Λ is allowed both energetically and by supermultiplet symmetry. The upper (narrow) state has symmetry [ f ] = [32] for its nuclear core, so that its decay to 5 Li +Λ or 5 Λ He+p, is forbidden by the selection rules for the supermultiplet symmetry.…”

Section: Approachmentioning

confidence: 99%

“…The lower state has symmetry [41] for its nuclear core, so its break-up to 5 Λ He+p or to 5 Li+Λ is allowed both energetically and by supermultiplet symmetry. The upper (narrow) state has symmetry [ f ] = [32] for its nuclear core, so that its decay to 5 Li +Λ or 5 Λ He+p, is forbidden by the selection rules for the supermultiplet symmetry. Another example of the important role s −1 s Λ states play are γ-ray transitions in hyperfragments.…”

Section: Approachmentioning

confidence: 99%

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Hyperfragments from lightest p-shell hypernuclei

Majlingová¹,

Majling²

2013

Proceedings of XXI International Baldin Seminar on High Energy Physics Problems — PoS(Baldin ISHEPP XXI)

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In this contribution, we discuss the potential of Λ-hypernuclear physics. A short overview of current experiments is given and the essential features of Λ hypernuclei are briefly mentioned. The observation of the heavy hyper Hydrogen 6 Λ H revived interest in identification of hyperfragments -products of the strong decay of a primary hypernuclei. The registration of hypernuclei 6 Λ H and 8 Λ H was already put on the list of tasks for Nuclotron. Theoretical background is pointed out and experimental possibilities are compared with other experiment. Our contribution is inspired by the possibility to identify hyperfragments in the reaction (e, e K + ). In the near future two experiments: at JLab and at Mainz will provide a systematic study of the fragments from the primary p-shell hypernuclei. It is an important extension of the very successful experiments investigated discrete part of hypernuclear spectra. We present an approach to identification hyperfragments from p-shell hypernuclei. As a first step we analyze the decay of the components of Strange Analogue States (p Λ p −1 , s Λ s −1 ) for hypernuclei A ≤ 9 using Translation Invariant Shell Model (TISM). The attention is focused on the nuclear structure role of concrete decay channels population. Some predictions are given.

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“…Conventional nuclear physics as well as systematics fail to explain the observations ••• " Actually, there have been a number of suggested explanations [12][13][14][15][16][17][18]. They range from postulating quasi-molecular nuclei and "bubble" nuclei to postulating the existence of a new quantum number.…”

Section: Lbl-14075mentioning

confidence: 99%

Anomalons as pineuts bound to nuclear fragments: A possible explanation

Rasmussen

1983

Physics Letters B

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Production of hypernuclei in a 2.1 GeV/nucleon oxygen beam

Cited by 58 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

Hyperfragments from lightest p-shell hypernuclei

Anomalons as pineuts bound to nuclear fragments: A possible explanation

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