Applied Physics and Mathematics Annotation << Back Electrostatic calculation of the mass differencebetween the neutron and proton(model of free quarks) Sobko A.A.Garelina S.A. Abstract. All textbooks and monographs noted that the difference between neutron and proton masses caused by electrostatic (Coulomb) interaction, but the calculation of this vzaimodestviya in literature. This work is the first in the series of works devoted to the calculation of the mass difference between the baryon multiplets. On the basis of the quark model of the nucleon Monte Carlo calculated Coulomb interaction energy of the quarks. In the simplest model, it was assumed that the quarks inside the nucleon behave as free particles. But even in this rather crude model calculate the results of the mass difference of the neutron and proton are different from the experimental values by no more than ten percent. Key words: neutron, proton, nucleon, quark, Monte Carlo method. Contacts: E-mail: ainrf@mail.ru Pp. 18-21.