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

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 \eta N \to \pi N inside the nucleus and the radiative decay \eta \to \gam...

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Bibliographic Details
Published in:arXiv.org 2003-06
Main Authors: Baskov, V A, Bocquet, J P, Kouznetsov, V, Lleres, A, L'vov, A I, Pavlyuchenko, L N, Polyanski, V V, Rebrevend, D, Sokol, G A
Format: Article
Language:English
Subjects:
BGO (crystal)
Decay
Eta-mesons
Mesons
Nuclei
Photon beams
Photoproduction
Scintillation counters
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Summary: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 \eta N \to \pi N inside the nucleus and the radiative decay \eta \to \gamma \gamma outside. 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.
ISSN:2331-8422