The $ηNN$ coupling constant

Details The $ηNN$ coupling constant The $ηNN$ coupling constant

2000-02-06

arxiv.org/abs/nucl-th/0002018v2

Phys.Rev. C61 (2000) 065205

Physics

Nuclear Physics

Nuclear Theory

RevTex, two figures, discussions added, Phys. Rev. C (in press)

Scientific paper

10.1103/PhysRevC.61.065205

We derive the light cone QCD sum rule for the $\eta NN$ coupling constant
$g_{\eta NN} $. 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 result is $\alpha_{\eta
NN}=(0.3\pm 0.15)$, which favors small values used in literatures.

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