Eur. Phys. J. A (2005) 25: 137-140
https://doi.org/10.1140/epja/i2005-10035-1

Original Article

Σatomic states and the nucleon distribution in Pb

Theoretical Division, Sołtan Institute for Nuclear Studies, Hoza 69, Pl-00-681, Warsaw, Poland

Received: 15 February 2005
Accepted: 27 April 2005
Published online: 31 May 2005

Abstract

The analyses of (K ^-,π) and (π^-, K ⁺) reactions indicate that the nuclear potential of the Σ-hyperon is repulsive inside the nucleus, in agreement with the prediction of model F of the Nijmegen baryon-baryon interaction. This is consistent with the recent calculation of the strong-interaction shifts and widths of the observed levels of Σ^- atoms, including the precise data on the Σ^-Pb atom. In this paper, the sensitivity of this calculation to the neutron and proton density distributions is used to determine these densities in ²⁰⁸Pb.