Pomeron-nucleon coupling in QCD

The Pomeron-nucleon coupling vertex is theoretically derived from the fundamental theory of strong interaction, QCD. The empirical vertex beta gamma(mu)F(1)(t) used commonly in diffractive processes with a coupling strength beta = 6.0GeV(-1) is initially obtained. Our study not only reproduces the Pomeron-nucleon coupling from QCD but also clearly shows the gluonic origin and glueball nature of Pomeron. From this investigation together with the results of our previous study, we may claim that the Pomeron could be regarded as a Reggeized tensor glueball xi(2230) with quantum numbers of I(G)J(PC) = 0(+)2(++) which lies on the Pomeron trajectory alpha(P)(t = M-xi(2)) = 2. Consequently, longstanding puzzle that no physical particle lies on the Pomeron trajectory seems to be solved.