The strong $ρNN$ coupling derived from QCD

Details The strong $ρNN$ coupling derived from QCD The strong $ρNN$ coupling derived from QCD

1998-09-10

arxiv.org/abs/nucl-th/9809032v2

Phys.Rev.C59:435-441,1999

Physics

Nuclear Physics

Nuclear Theory

Several references and discussion of final results added, final version to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.59.435

We study the two point correlation function of two nucleon currents sandwiched between the vacuum and the rho meson state. The light cone QCD sum rules are derived both for $\rho NN$ vector and tensor couplings simultaneously. The contribution from the excited states and the continuum is subtracted cleanly through the double Borel transform with respect to the two external momenta, $p_1^2$, $p^2_2=(p-q)^2$. Our results are $g_\rho =(2.5\pm 0.2)$, $\kappa_\rho =(8.0\pm 2.0), in good agreement with the values used in the nuclear forces.

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