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29 March 2024
 
  » arxiv » 1212.6313

 Article overview


Studies of eta-mesic nuclei at the LPI electron synchrotron
V. A. Baskov ; A. V. Koltsov ; A. I. L'vov ; A. I. Lebedev ; L. N. Pavlyuchenko ; V. V. Polyanskiy ; E. V. Rzhanov ; S. S. Sidorin ; G. A. Sokol ; S. V. Afanasiev ; A. I. Malakhov ; A. S. Ignatov ; V. G. Nedorezov ;
Date 27 Dec 2012
AbstractA 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.
Source arXiv, 1212.6313
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