Possibility to study eta-mesic nuclei and photoproduction of slow eta-mesons at the GRAAL facility

V. A. Baskov; J. P. Bocquet; V. Kouznetsov; A. Lleres; A. I. L'vov; L. N. Pavlyuchenko; V. V. Polyanski; D. Rebrevend; G. A. Sokol

arXiv · nucl-ex/0306011

Possibility to study eta-mesic nuclei and photoproduction of slow eta-mesons at the GRAAL facility

V. A. Baskov·J. P. Bocquet·V. Kouznetsov·A. Lleres·A. I. L'vov·L. N. Pavlyuchenko·V. V. Polyanski·D. Rebrevend·G. A. Sokol

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Abstract

A new experiment is proposed with the aim to study eta-mesic nuclei and low-energy interactions of eta with nuclei. Two decay modes of eta produced by a photon beam inside a nucleus will be observed, namely a collisional decay ηN \to πN inside the nucleus and the radiative decay η\to γγoutside. In addition, a collisional decay of stopped S_{11}(1535) resonance inside the nucleus, S_{11}(1535) N \to N N, will be studied. The experiment can be performed using the tagged photon beam at ESRF with the end-point energy 1000 MeV and the GRAAL detector which includes a high-resolution BGO calorimeter and a large acceptance lead-scintillator time-of-flight wall. Some results of simulation and estimates of yields are given.

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V. A. Baskov, J. P. Bocquet, V. Kouznetsov, A. Lleres, A. I. L'vov, L. N. Pavlyuchenko, V. V. Polyanski, D. Rebrevend, G. A. Sokol. 2003-06-09. Possibility to study eta-mesic nuclei and photoproduction of slow eta-mesons at the GRAAL facility. https://arxiv.org/abs/nucl-ex/0306011

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