Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-07-15
Phys.Rev. D57 (1998) 3026-3035
Physics
High Energy Physics
High Energy Physics - Phenomenology
Text with 11 pages in LaTeX (twocolumn form), 10 figures in PostScript (psfig.tex used). Replaced with changes, Fig.1 modified
Scientific paper
10.1103/PhysRevD.57.3026
Making use of the gluon gauge-invariant two-point correlation function, recently determined by numerical simulation on the lattice in the quenched approximation and the stochastic vacuum model, we calculate the elementary (parton-parton) amplitudes in both impact-parameter and momentum transfer spaces. The results are compared with those obtained from the Kr\"{a}mer and Dosch ansatz for the correlators. Our main conclusion is that the divergences in the correlations functions suggested by the lattice calculations do not affect substantially the elementary amplitudes. Phenomenological and semiempirical information presently available on elementary amplitudes is also referred to and is critically discussed in connection with some theoretical issues.
Martini A. F.
Menon Marcio J.
Thober Dario Sassi
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