Electric Polarizability of the Nucleon in the Nambu–Jona-Lasinio Model

The electric polarizability of the nucleon is calculated in the soliton approach to the Nambu–Jona-Lasinio model. We analyze the leading-Nc contributions, as well as the effects of rotational 1/Nc corrections and ∆-N mass splitting. Our model prediction is substantially reduced compared to other soliton calculations, and is closer to the experimental value. PACS: 12.40.Aa, 11.15.Pg, 11.40.Ha Typeset using REVTEX On leave of absence from Institute for Nuclear Research and Nuclear Energy, 1784 Sofia, Bulgaria; DAAD fellow On leave of absence from Institute of Nuclear Physics, PL-31342 Cracow, Poland; Alexander von Humboldt fellow E-mail addresses: emiln or [email protected] [email protected]