Feasibility Study of Observing  ' Mesic Nuclei with (p,d) Reaction

Itahashi, K.; Fujioka, Hiroyuki; Geißel, H.; Hayano, R.; Hirenzaki, S.; Itoh, Satoshi; Jido, Daisuke; Metag, V.; Nagahiro, Hideko; Nanova, M.; Nishi, Takahiro; Okochi, Kota; Outa, H.; Suzuki, K.; Tanaka, Y. K.; Weick, H.

doi:10.1143/ptp.128.601

Cited by 60 publications

(27 citation statements)

References 25 publications

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“…However, so far most of the experimental studies have been concentrated on the search for the η-mesic nuclei because the η-nucleon interaction seems to be much stronger than the η -nucleon or π-nucleon [12]. Yet, recently there are vigourous theoretical [59,117,[121][122][123] and experimental [124][125][126] investigations of feasibility of the observation of the η -mesic nuclei started by the predictions published in [127]. Based on the cross sections from the pp → ppη reactions a scattering length of the p − η potential seems to be small [12], on the other hand recent photoproduction measurements of CBELSA/TAPS [128,129] shows that the real part of the η -nucleus optical potential is larger than its imaginary part giving a hope for the observation of the η mesic nucleus.…”

Section: Threshold Production Of the η − 3 H E And η − H E Systems Anmentioning

confidence: 99%

Few-Body Aspects of the Near Threshold Pseudoscalar Meson Production

Moskal

2014

Few-Body Syst

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During the last decade large samples of data have been collected on the production of the groundstate pseudoscalar mesons in collisions of proton or deuteron beam with hydrogen or deuterium target. These measurements have been performed in the vicinity of the kinematical threshold for meson production where only a few partial waves in both initial and final state are expected to contribute to the production process. This simplifies significantly the interpretation of the data, yet still appears to be challenging due to the three or four particle final state systems with a complex hadronic potential. We review experiments and phenomenology of the near threshold production of the ground-state mesons in the few-body final states as for example: nucleus-meson and nucleon-nucleon-meson, and report on the status of the search of the mesic-nuclei (a meson-nucleus bound states). Experimental advantages of measurements close to the kinematical threshold are discussed, and general features of the production mechanism of the η and η mesons in the nucleon-nucleon collisions are presented emphasising results of measurements of spin and isospin dependence of the production cross sections.

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Section: Threshold Production Of the η − 3 H E And η − H E Systems Anmentioning

confidence: 99%

Few-Body Aspects of the Near Threshold Pseudoscalar Meson Production

Moskal

2014

Few-Body Syst

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“…The strong mass reduction in nuclear matter provides a strong attractive scalar potential for the η meson in finite nuclei. This has stimulated experimental and theoretical studies searching for η bound states in nuclei [25,26].…”

Section: Introductionmentioning

confidence: 99%

Theoretical study of photoproduction of anη′Nbound state on a deuteron target with forward proton emission

Sekihara

Sakai

2016

Phys. Rev. C

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Possibilities of observing a signal of an η n bound state are investigated by considering photoproductions of the η and η mesons on a deuteron target with forward proton emission. For this purpose, we take the η n interaction from the linear σ model with a coupling to ηn, in which an s-wave η n bound state can be dynamically generated, and we fix the γp → ηp and η p scattering amplitudes so as to reproduce the experimental cross sections with forward proton emission. By using these γp → η ( ) p and η ( ) n → η ( ) n amplitudes, we calculate cross sections of the γ d → ηnp and η np reactions with forward proton emission in single and η ( ) -exchange double-scattering processes. As a result, we find that the signal of the η n bound state can be seen below the η n threshold in the ηn invariant mass spectrum of the γ d → ηnp reaction and is comparable with the contribution from the quasifree η production above the η n threshold. We also discuss the behavior of the signal of the η n bound state in several experimental conditions and model parameters.

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“…The search for such states is encouraged by the relatively small in-medium width of the η [13]. There are experiments proposed to search for η bound states via missing mass spectroscopy [14] at the FRS at GSI and in an exclusive measurement at the BGO-OD setup at the ELSA accelerator in Bonn [15]. The observation of a η -nucleus bound states would provide important information on the in-medium properties of the η meson.…”

Section: Resultsmentioning

confidence: 99%

New experimental approaches to determine the in-medium properties of the η'-meson*

Nanova¹

2013

Proceedings of 51st International Winter Meeting on Nuclear Physics — PoS(Bormio 2013)

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In-medium properties of mesons can be studied by determination of the meson-nucleus optical potential. As discussed in [1], transparency ratio measurements provide information on the inelastic cross section and in-medium width of the η meson and thereby on the imaginary part of the η -nucleus potential. Experimental approaches to learn more about the real part of the η -nucleus optical potential are presented. The momentum distribution and the excitation function show some sensitivity to in-medium modifications and could provide information on the sign and

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Feasibility Study of Observing ' Mesic Nuclei with (p,d) Reaction

Cited by 60 publications

References 25 publications

Few-Body Aspects of the Near Threshold Pseudoscalar Meson Production

Few-Body Aspects of the Near Threshold Pseudoscalar Meson Production

Theoretical study of photoproduction of anη′Nbound state on a deuteron target with forward proton emission

New experimental approaches to determine the in-medium properties of the η'-meson*

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