Letter to the Editor

Search for η-mesic nuclei in photoproduction processes

G. A. Sokol ; P. N. Lebedev Physical Institute of RAS, Leninsky Prospect 53, Moscow 117924, Russia
T. A. Aibergenov ; P. N. Lebedev Physical Institute of RAS, Leninsky Prospect 53, Moscow 117924, Russia
A. V. Kravtsov ; P. N. Lebedev Physical Institute of RAS, Leninsky Prospect 53, Moscow 117924, Russia
A. I. L'vov ; P. N. Lebedev Physical Institute of RAS, Leninsky Prospect 53, Moscow 117924, Russia
L. N. Pavlyuchenko ; P. N. Lebedev Physical Institute of RAS, Leninsky Prospect 53, Moscow 117924, Russia

Abstract

We present preliminary results of an experiment performed at the 1–GeV electron synchrotron of the Lebedev Physical Institute. Using the bremsstrahlung photon beam with the end-point energy of 650–850 MeV and the carbon target, correlated π +n pairs with opening angle hθπN i = 180◦ and energies hEπ+ i = 300 MeV, hEni = 100 MeV have been observed. They arise from the process γ + 12C → N + η(A − 1) → N + π +n + (A − 2) and provide evidence for the existence of 11 ηB and 11 ηC η-mesic nuclei.

Keywords

η-meson; η-mesic nuclei; S11 resonance; correlated πN-pairs

Hrčak ID:

305294

URI

https://hrcak.srce.hr/305294

Publication date:

1.3.1999.

Article data in other languages: croatian

Visits: 110 *