Final-state Lambda-neutron interaction in kaon photoproduction from the deuteron

Li, Xiaodong; Wright, L. E.

doi:10.1088/0954-3899/17/7/011

Cited by 43 publications

(21 citation statements)

References 14 publications

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“…In a recent publication [21] we argued that also largemomentum transfer reactions such as pp → K + p [22][23][24] [25][26][27][28][29][30] are excellent candidates for extracting scattering lengths information. In reactions with large momentum transfer the production process is necessarily of a short-range nature.…”

Section: Introductionmentioning

confidence: 99%

Extraction of scattering lengths from final-state interactions

2005

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A recently proposed method, based on dispersion theory, that allows the scattering length of a hadronic two-body system to be extracted from corresponding final-state interactions is generalized to the situation where the Coulomb interaction is present. The steps required in a concrete practical application are discussed in detail. In addition a thorough examination of the accuracy of the proposed method is presented and a comparison is made with results achieved with other methods such as the Jost-function approach based on the effective-range approximation. Deficiencies of the latter method are pointed out. The reliability of the dispersion theory method for also extracting the effective range is investigated.

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Section: Introductionmentioning

confidence: 99%

Extraction of scattering lengths from final-state interactions

2005

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“…The source of this inconsistency is attributed to the charge symmetry breaking (CSB) in ΛN interaction. Recent reports on precise measurements for 4 Λ H at MAMI [1] and 4 Λ He at J-PARC [2] support the large CSB effect in the ΛN interaction suggested by old emulsion experiments.…”

Section: Introductionmentioning

confidence: 65%

“…Most of the past efforts involving the ΛN interaction were made through hypernuclei. Results from these studies have highlighted a discrepancy between experimental data and theoretical calculations for the Λ binding energy of 4 Λ H and 4 Λ He. The source of this inconsistency is attributed to the charge symmetry breaking (CSB) in ΛN interaction.…”

Section: Introductionmentioning

confidence: 99%

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Study of Λ-n Interaction via FSI in γ+d Reaction

Kaneta¹

2017

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

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In this paper we present our motivation for an experiment to measure the scattering length and the effective range of the Λ-n interaction via γ + d reaction using NKS2 spectrometer at Research Center of Electron Photon Science (ELPH), Tohoku University. The effective range approximation is adopted as an approach to estimate the contribution of the enhancement effect in the spectrometer acceptance. For this purpose, we outline and describe the already completed upgrades and further intended improvement in preparation for the new experiment. KEYWORDS:Baryon-Baryon interaction, strangeness, photo-reaction IntroductionThe NKS2 collaboration has been studying the strangeness photoproduction in γ + d reaction near the threshold at ELPH-TOHOKU. A new future focus now includes investigating the Λn interaction via a K + measurement in γ + d reaction. Most of the past efforts involving the ΛN interaction were made through hypernuclei. Results from these studies have highlighted a discrepancy between experimental data and theoretical calculations for the Λ binding energy of 4 Λ H and 4 Λ He. The source of this inconsistency is attributed to the charge symmetry breaking (CSB) in ΛN interaction. Recent reports on precise measurements for 4 Λ H at MAMI [1] and 4 Λ He at J-PARC [2] support the large CSB effect in the ΛN interaction suggested by old emulsion experiments.One of the keys to understand the ΛN CSB is a comparison of Λp with Λn interaction by direct measurement. Presently there are no reported data sets for Λn scattering primarily due to lack of a neutron target and difficulty in experimental setup. In contrast, there have been reported data for Λp interaction from scattering experiments. Consequently, the S-wave Λn scattering length is still not determined. To obtain information about the Λn interaction, we propose a different kind of experiment from hypernuclear studies, which require not only details on the interaction, but also discussions on nuclear structure. The K + measurement in γ+d reaction should yield important information on inelastic scattering and the low energy region of Λn interaction.Theoretical studies show that the cross section of K + production differs in γ + d from γ + p by the final state interaction (FSI) of Λn. The effect appears in the production threshold region and is roughly 10 times larger in forward and backward region in CM system [3][4][5][6]. NKS2 experimentThe NKS2 spectrometer is located downstream of a real photon beam line in the 2nd experimental hall at ELPH. The photon tagging system is located in a synchrotron ring and provides timing and energy information for the generated photons. The photon beam is produced by bremsstrahlung from electrons scattered by a carbon wire inserted into the path of the orbiting electrons and the recoil electrons are measured by the tagger. energy of orbiting electrons with a maximum electron energy of the stretcher booster ring of 1.2 GeV. More detailed information on the photon tagging system can be found elsewhere [7].The booster ring was re...

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“…Following a description by Li and Wright [5] three A-nucleon potentials (Verma, Julich A & B) were parameterized with double-gaussian potentials. In ref.…”

Section: Resultsmentioning

confidence: 99%

Electroproduction of kaons on light nuclei

Zeidman¹,

Abbott²,

Ahmidouch³

et al. 2001

Nuclear Physics A

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The A(e,e'K+)YX reaction on H, D, 3He, and 4He was investigated in Hall C at CE-BAF. Data were obtained for Q2 x 0.35 and 0.5 GeV2 at 3.245 GeV. The missing mass spectra for both H and D are fitted with Monte-Carlo simulations incorporating peaks corresponding to A production on the proton and X production on both the proton and neutron. For D, the cross section ratio XO/E-= 2, and excess yield close to the thresholds for A and 2 production can be attributed to final-state interactions that are compared to the data. The analysis of the data "for the He targets is in a more preliminary state with broader quasi-free peaks resulting from the higher Fermi momenta. Evidence for bound A-hypernuclear states is seen and other structure may be present.

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Final-state Lambda-neutron interaction in kaon photoproduction from the deuteron

Cited by 43 publications

References 14 publications

Extraction of scattering lengths from final-state interactions

Extraction of scattering lengths from final-state interactions

Study of Λ-n Interaction via FSI in γ+d Reaction

Electroproduction of kaons on light nuclei

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