Spectroscopy of medium-heavy Λ hypernuclei via the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo>(</mml:mo><mml:mrow><mml:msup><mml:mrow><mml:mi>π</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mrow><mml:msup><mml:mrow><mml:mo>,</mml:mo><mml:mi>K</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow><mml:mo>)</mml:mo></mml:math>reaction

Hotchi, H.; Nagae, T.; Outa, H.; Noumi, H.; Sekimoto, M.; Fukuda, T.; Bhang, H.; Kim, Y. D.; Kim, J. H.; Park, H.; Tanida, K.; Hashimoto, Osamu; Tamura, H.; Takahashi, T.; Sato, Y.; Endo, T.; Satoh, Shiro; Nishida, Jun; Miyoshi, T.; Saitoh, T.; Kishimoto, T.; Sakaguchi, A.; Ajimura, S.; Shimizu, Yuki; Mori, Takasuke; Minami, S.; Sumihama, M.; Sawafta, R.; Tang, L.

doi:10.1103/physrevc.64.044302

Cited by 153 publications

(59 citation statements)

References 28 publications

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“…This implied that there is more chance to study excited states for charmed baryons. That larger l states are produced more than lower l states has been observed in hyper nucleus productions [14]. There the hyper nucleus has a larger size of order a few fm, and so this is realized for lower momentum transfer.…”

Section: Productions Of Various Baryonsmentioning

confidence: 73%

Charmed Baryons and Their Interactions

Hiyama

Kim

et al. 2017

Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)

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In this proceedings report, we discuss unique features of charmed, or in general heavy, baryons with one heavy quark. A well and long-term known phenomenon, the distinction of the two modes of the ρ and λ type of a three-quark system is revisited. The difference of these modes may be tested in the production and decay reactions of the baryons which may be tested in the future experiments at J-PARC.

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Section: Productions Of Various Baryonsmentioning

confidence: 73%

Charmed Baryons and Their Interactions

Hiyama

Kim

et al. 2017

Proceedings of the 12th International Conference on Hypernuclear and Strange Particle Physics (HYP2015)

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“…If so, the compensating ΛNN repulsive interaction is also huge, canceling most of the ΛN attraction in reaching the phenomenologically deduced value of D Λ ∼ 30 MeV. To estimate D (2) Λ , one starts from the 1st order Λ-nucleus optical potential 'tρ' form, including long-range Pauli correlations [78],…”

Section: Discussionmentioning

confidence: 99%

“…Woods-Saxon V = 30.05 MeV, r = 1.165 fm, a = 0.6 fm FIGURE 1. Left: 89 Y(π + , K + ) spectrum from KEK, exhibiting Λ single-particle orbits [2]. Right: compilation of Λ binding energies in 7 Λ Li to 208 Λ Pb from different reactions, and as calculated using a 3-parameter WS potential [3].…”

mentioning

confidence: 99%

Old & new in strangeness nuclear physics

Gal¹

2019

AIP Conference Proceedings

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Several persistent problems in strangeness nuclear physics are discussed in this opening talk at HYP2018, Norfolk VA, June 2018: (i) the 3 Λ H, and 3 Λ n if existing, lifetimes; (ii) charge symmetry breaking in Λ hypernuclei; (iii) the overbinding of 5 Λ He which might be related to the hyperon puzzle in neutron stars; and (iv) does Λ * (1405) survive in strange hadronic matter? Progress in Strangeness Nuclear Physics which 50 years ago consisted mostly of Hypernuclear Physics, with data collected exclusively in nuclear emulsions and bubble chambers, has been stepped up significantly with the advent of counter production experiments [1]. The left panel of Fig. 1 shows a 89 Y(π + , K + ) spectrum from KEK [2], exhibiting distinct Λ single-particle orbits in 89 Λ Y down to the ground-state (g.s.) s Λ orbit, a feature unparalleled in ordinary nuclei and hence termed "a textbook example of a shell model at work" [3].The right panel of Fig. 1 presents a compilation of most of the Λ hypernuclear binding energies (B Λ ) measured across the periodic table as a function of A −2/3 and as fitted by a simple 3-parameter Woods-Saxon (WS) potential. The Λ nuclear potential well depth D Λ in this simple-minded fit is 30 MeV, compared to 27.8±0.3 MeV from the 1988 first theoretical analysis [3] of the AGS (π + , K + ) data [4]. Although the robustness of extrapolating to A → ∞ is primarily owing to the (π + , K + ) production data in medium-weight and heavy nuclei, it is worth noting that D Λ was derived more than 50 years ago, to less accuracy of course, from π − decays of heavy spallation hypernuclei formed in silver and bromine emulsions [5,6]: 27±3 MeV (1964) and 27.2±1.3 MeV (1965), respectively.

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“…The ground state and excitation energies for light and heavy hypernuclear systems up to A = 209 were investigated by (K − , π − ) and (π + , K + ) reaction spectroscopy using the missing-mass method. One of novel results is a clear observation of shell structures even deeply inside nuclei for heavy hypernuclear systems [21,22] which are not observed by spectroscopy of ordinary nuclei due to the large natural widths of the states. This is due to the fact that a Λ can reside in a deep orbit occupied by nucleons since a single embedded Λ is not subject to the Pauli Principle from nucleons.…”

Section: Introductionmentioning

confidence: 99%

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:
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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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Spectroscopy of medium-heavy Λ hypernuclei via the(π+,K+)reaction

Cited by 153 publications

References 28 publications

Charmed Baryons and Their Interactions

Charmed Baryons and Their Interactions

Old & new in strangeness nuclear physics

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:
Self Cite
12
0
6
0
View full text Add to dashboard Cite

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Spectroscopy of medium-heavy Λ hypernuclei via the(π+,K+)reaction

Cited by 153 publications

References 28 publications

Charmed Baryons and Their Interactions

Charmed Baryons and Their Interactions

Old & new in strangeness nuclear physics

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: Self Cite12060View full textAdd to dashboardCite

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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:
Self Cite
12
0
6
0
View full text Add to dashboard Cite