Elsevier

Nuclear Physics A

Volume 477, Issue 4, 22 February 1988, Pages 596-608
Nuclear Physics A

Nucleon-delta mass difference in the chiral bag plus Skyrmion hybrid model

https://doi.org/10.1016/0375-9474(88)90408-3Get rights and content

Abstract

We study the nucleon-delta isobar mass difference in the chiral bag plus skyrmion hybrid model (CSH). While in the Skyrme model the collective rotation solely provides the mass difference, in the CSH model the one-gluon exchange process also contributes in addition to the collective rotation due to the broken symmetry restoration. We study the one-gluon exchange contribution using the collective coordinate projection method. We find that the one-gluon exchange energy tends to compensate for the decreasing tendency of the rotational energy in the large bag region.

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