STRANGENESS IN THE SCALAR FORM-FACTOR OF THE NUCLEON

The scalar form factor of the nucleon and related physical quantities are investigated in the framework of the semibosonized SU(3) Nambu-Jon a-Lasinio soliton model. We take into account the rotational 1/N-c cor rections and linear m(s) corrections. The strangeness content of the n ucleon in the scalar form factor is discussed in detail. In particular , it is found that the m(s) corrections play an essential role of redu cing the [N\<(s)over bar s>\N] arising from the leading order and rota tional 1/N-c contributions. We obtain the sigma(pi N)(0) = 40.80 MeV, Delta sigma = sigma(pi N)(2m(pi)(2)) - sigma(pi N)(0) = 18.18 MeV and [r(2)](S)(N) = 1.50 fm(2). The results are in a remarkable agreement w ith empirical data analyzed by Gasser, Leutwyler and Sainio.