О НАРУШЕНИИ ИЗОСПИНОВОЙ ИНВАРИАНТНОСТИ КОНСТАНТЫ ПИОН-НУКЛОННОЙ СВЯЗИ И ДЛИНЫ НУКЛОН-НУКЛОННОГО РАССЕЯНИЯ

Charge independence breaking (CIB) in the pion-nucleon coupling constant and the nucleon-nucleon scattering length is considered on the basis of the Yukawa meson theory. CIB effect in these quantities is almost entirely explained by the mass difference between the charged and the neutral pions. Therewith charge splitting of the pionnucleon coupling constant is almost the same as charge splitting of the pion mass. Calculated difference between the proton-proton and the neutron-proton scattering length in this case comprises ~90% of the experimental value. [ABSTRACT FROM AUTHOR]