Studies of eta-mesic nuclei at the LPI electron synchrotron
2012
Online
report
A brief review of searches for eta-mesic nuclei is presented with emphasis on photoreactions and results of a new experiment done at the LPI electron synchrotron are reported. Decay products of eta-mesic nuclei presumably formed by photons in a carbon target, namely correlated back-to-back (pi+ n) and (p n) pairs, have been studied with a two-arm time-of-flight setup. The obtained data show that apart from previously observed (pi+ n) pairs from one-nucleon annihilation of stopped etas (via eta N --> pi N) correlated (p n) pairs from two-nucleon absorption of eta in the nucleus (via eta NN --> NN) are also ejected with a comparable rate. The cross section of eta-mesic nuclei photoproduction off carbon was estimated from the obtained data to be less than 10 microbarn.
Comment: 17 pages, 13 figures. Extended text of a talk given by V. V. Polyanskiy at the XXI Int. Baldin Seminar on High Energy Physics Problems, Sep 10-15, 2012, Dubna and at the XIII Int. Seminar on Electromagnetic Interactions of Nuclei, Sep 20-23, 2012, Moscow. To appear in the conference proceedings, PoS(Baldin ISHEPP XXI)102
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Studies of eta-mesic nuclei at the LPI electron synchrotron
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Autor/in / Beteiligte Person: | Baskov, V. A. ; Koltsov, A. V. ; L'vov, A. I. ; Lebedev, A. I. ; Pavlyuchenko, L. N. ; Polyanskiy, V. V. ; Rzhanov, E. V. ; Sidorin, S. S. ; Sokol, G. A. ; Afanasiev, S. V. ; Malakhov, A. I. ; Ignatov, A. S. ; Nedorezov, V. G. |
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Veröffentlichung: | 2012 |
Medientyp: | report |
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