FIZIKA B 8 (1999) 2, 383-386

LETTER TO THE EDITOR

THE ROLE OF THE PION CLOUD IN THE NUCLEON FORM FACTORS

M. ROSINA^a,b, M. FIOLHAIS^c, B. GOLLI^d,b, S. ŠIRCA^b

^a Faculty of Mathematics and Physics, University of Ljubljana, Ljubljana, Slovenia
^b Jožef Stefan Institute, Jamova 39, P.O. Box 3000, 1001 Ljubljana, Slovenia
^c Department of Physics, University of Coimbra, 3000 Coimbra, Portugal
^d Faculty of Education, University of Ljubljana, Ljubljana, Slovenia

Received 14 January 1999; Accepted 7 June 1999

It is shown in the linear sigma model and in the chromodielectric model how the pion cloud enhances the electric polarizability, the electroexcitation of the D and the axial form factor and how it reduces the magnetic polarizability.

PACS numbers: 13.40.-f, 14.20.Gk
UDC 539.126

Keywords: D, linear sigma model, chromodielectric model, electric polarizability, electroexcitation, axial form factor, magnetic polarizability

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