Baryonium X(1835)

Abstract

The relativistic six-quark equations including the u, d quarks and antiquarks are found. The nonstrange baryonia B B are constructed without the mixing of the quarks and antiquarks. The relativistic six-quark amplitudes of the baryonia are calculated. The poles of these amplitudes determine the masses of baryonia. 16 masses of baryonia are predicted.