First Observation of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="italic">Λ</mml:mi></mml:mrow></mml:msub></mml:mrow><mml:mspace /><mml:mo>→</mml:mo><mml:mspace /><mml:mrow><mml:msub><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mi>Λ</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>γ</mml:mi></m

May, M.; Alburger, D.E.; Bart, S.; Chrien, R. E.; Sawafta, R.; Deutsch, Martin; Lia, V.; Wissink, S. W.; Lisantti, J.; Wells, S. P.; Bowyer, S.M.; Franklin, Wilbur A.; Hicks, K.; Clark, Harry; Michael, R.; Lee, L.; Funsten, H.O.; Kormanyos, C.; Wise, J.; Barakat, M.B.; Stearns, R. L.

doi:10.1103/physrevlett.78.4343

Cited by 37 publications

(7 citation statements)

References 13 publications

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“…For A→ 0 they converge asymptotically to the binding energy of a single Λ in infinite matter, E Λ =-28 MeV. The data originate from A X(π, K) A X Λ reactions [32][33][34][35][36]…”

Section: Discussionmentioning

confidence: 91%

“…are compared to DDRH and a phenomenological RMF model [4] 1. χ 2 distribution for the deviation of DDRH Λ single particle energies and hypernuclear data (obtained in (π, K) reactions [32][33][34][35][36]). In the calculations, the scalar and vector vertex factors (R σ , R ω ) were varied freely.…”

Section: Discussionmentioning

confidence: 99%

“…1 the χ 2 deviations of calculated and measured Λ single particle spectra are shown. Varying freely the R σ and R ω scaling factors, DDRH single particle energies for 208 Pb Λ , 89 Y Λ , 51 V Λ , 40 Ca Λ , 28 Si Λ , 16 O Λ , 12 C Λ and 9 Be Λ were compared to data deduced from (π, K) [32][33][34][35][36] experiments. With precise measurements resolving spin-orbit doublets to high accuracy such a procedure would, in fact, allow to fix both the scalar and vector scaling factors unambigously because the centroid and splitting energies are determined by difference and sum of the scalar and vector mean-field components, respectively.…”

Section: The Vertex Scaling Factorsmentioning

confidence: 99%

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Density dependent hadron field theory for hypernuclei

2000

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The Density Dependent Relativistic Hadron Field (DDRH) theory, previously introduced and applied to isospin nuclei, is extended to hypernuclei by including the octet hyperons. Infinite matter Dirac-Brueckner theory for octet baryons and the derivation of in-medium DDRH baryon-meson vertices is discussed. From the properties of Dirac-Brueckner interactions it is found that hyperon and nucleon self-energies and vertices are related by the ratios of free space coupling constants. This leads to simple scaling laws for the in-medium hyperon and nucleon vertices. The model is applied in relativistic DDRH mean-field calculations to singl$\Lambda nuclei. Free space N-Lambda T-matrix results are used for the scalar vertex. As the only free parameter the hyperon vector vertex scaling factor is adjusted to a selected set of hypernuclear data. Spectroscopic data of single Lambda hypernuclei over the full mass range are well described. The reduced Lambda spin-orbit splitting is reproduced and found to be related closely the medium dependence of scalar and vector interactions.Comment: 38 pages, 9 figure

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“…For A→ 0 they converge asymptotically to the binding energy of a single Λ in infinite matter, E Λ =-28 MeV. The data originate from A X(π, K) A X Λ reactions [32][33][34][35][36]…”

Section: Discussionmentioning

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Section: The Vertex Scaling Factorsmentioning

confidence: 99%

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Density dependent hadron field theory for hypernuclei

2000

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“…However, this reaction seems an ideal tool to study light nuclei with high precision. Here, mostly nuclei are studied with simple shell structure of the hypernucleus or the core nucleus ( 4 He, 6 Li, 8 Be, 12 C, 16 O). Achievements of the past have been first estimates of the Λ LS-coupling, the Λ-N SS-coupling and the study of core excitation of Lambdahypernuclei.…”

Section: Hypernuclei (Strangeness Visiting Nuclei)mentioning

confidence: 99%

“…In the meanwhile the group at KEK, again using the (π + ,K + ) reaction with the superconducting Kaon spectrometer, has observed the p 3/2 -s 1/2 splitting to be 9.92 (±0.13±0.5) MeV [15]. Using the p 1/2 -s 1/2 gamma transition (10.95± 0.1± 0.2 MeV) observed at BNL [16] many years ago the LS splitting can be determined to 1.03 (± 0.23 ± 0.7). This should be compared to an LS-splitting of 0.72(± 0.5) MeV observed by the same group in 16 Λ O and previous results from BNL, limiting the LS splitting to 0.35 (± 0.3) MeV [17].…”

Section: Determination Of the Ss-couplingmentioning

confidence: 99%

Strangeness in hadronic interactions

Paul

2000

Nuclear Physics A

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Strangeness has always been an important subject at all PANIC conferences as it probably constitutes the best link between particle and nuclear physics. I will thus use the theme of the conference by considering strangeness as a tourist through the world of strong interaction. During this talk we will accompany strangeness from production, to the royaume of mesons and baryons up to the complex world of nuclei.

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Hyperons and Resonances in Nuclear Matter

Lenske¹,

Dhar²

2018

The Euroschool on Exotic Beams - Vol. 5

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First Observation of thepΛ→sΛγ

Cited by 37 publications

References 13 publications

Density dependent hadron field theory for hypernuclei

Density dependent hadron field theory for hypernuclei

Strangeness in hadronic interactions

Hyperons and Resonances in Nuclear Matter

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