Final state interactions in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>η</mml:mi><mml:mi>d</mml:mi></mml:math>system

Wycech, S.; Green, Anthony M.

doi:10.1103/physrevc.64.045206

Cited by 26 publications

(28 citation statements)

References 48 publications

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“…As one sees, this effect is significant and increases as the energy approaches the inelastic threshold (analogous conclusions with respect to the d interaction are given in Ref. [22]). With increasing energy the cross section becomes similar to the one of the impulse approximation but as one sees in Fig.…”

Section: ͑33͒supporting

confidence: 71%

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Low-energy scattering and photoproduction ofηmesons on three-body nuclei

Fix

Arenhövel

2003

Phys. Rev. C

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The optical potential approach for low-energy scattering of mesons on three-body nuclei is compared to an exact treatment of the 3N system using four-body scattering theory with separable interactions in s waves only. The higher-order terms including the interaction of the struck nucleon with the surrounding nuclear medium and virtual target excitations in between successive scatterings are found to cause important corrections. Effects of final state interaction in photoproduction on 3 H and 3 He are also studied and sizable contributions beyond the optical model approach are found.

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Section: ͑33͒supporting

confidence: 71%

“…Upper left panel: the S 11 partial wave of the N scattering amplitude predicted by the parametrization of S 11 ͑1535͒ resonance used in the present paper [see Eqs. (22) and (24)]. Notations: solid curve-real part, dashed-imaginary part.…”

Section: The Optical Model For 3 H Scatteringmentioning

confidence: 99%

Low-energy scattering and photoproduction ofηmesons on three-body nuclei

Fix

Arenhövel

2003

Phys. Rev. C

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“…Predictions of resonances in the light η-nucleus systems, namely, d, 3 He and 4 He, from the positions and movements of the poles of the amplitude, can be found in [25]. Finally to mention some predictions of 'virtual' states, a virtual (anti-bound) s-wave η 3 H state, which led to a large enhancement of the cross section for η production from the three-body nuclei was found in [26], whereas a narrow virtual state in the ηd system was found [27] to have a rather weak effect on the pn → ηd cross sections.…”

Section: Introductionmentioning

confidence: 97%

ηN scattering lengths favour ηd and ηα states

Kelkar

Khemchandani

Jain

2006

J. Phys. G: Nucl. Part. Phys.

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Unstable states of the eta meson and the 3 He nucleus predicted using the time delay method were found to be in agreement with a recent claim of η-mesic 3 He states made by the TAPS collaboration. Here, we extend this method to a speculative study of the unstable states occurring in the ηd and η 4 He elastic scattering. The T -matrix for η 4 He scattering is evaluated within the Finite Rank Approximation (FRA) of few body equations. For the evaluation of time delay in the ηd case, we use a parameterization of an existing Faddeev calculation and compare the results with those obtained from FRA. With an ηN scattering length, a ηN = (0.42, 0.34) fm, we find an ηd unstable bound state around −16 MeV, within the Faddeev calculation. A similar state within the FRA is found for a low value of a ηN , namely, a ηN = (0.28, 0.19) fm. The existence of an η 4 He unstable bound state close to threshold is hinted by a ηN = (0.28, 0.19) fm, but is ruled out by large scattering lengths.

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“…However, as noted in Ref. [7], the existence of a narrow virtual state in the η-deuteron system can be inferred.…”

Section: Introductionmentioning

confidence: 99%

Evidence for a backward peak in the γd → π0d cross section near the η threshold

Ilieva¹,

Berman²,

Kudryavtsev³

et al. 2010

Eur. Phys. J. A

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High-quality cross sections for the reaction γd → π 0 d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the η-meson photoproduction threshold. At backward c.m. angles for the outgoing pions, we observe a resonance-like structure near Eγ =700 MeV. Our model analysis shows that it can be explained by η excitation in the intermediate state. The effect is the result of the contribution of the N (1535)S11 resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate η meson dominates. PACS

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Final state interactions in theηdsystem

Cited by 26 publications

References 48 publications

Low-energy scattering and photoproduction ofηmesons on three-body nuclei

Low-energy scattering and photoproduction ofηmesons on three-body nuclei

ηN scattering lengths favour ηd and ηα states

Evidence for a backward peak in the γd → π0d cross section near the η threshold

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