The static PQCD potential with modified boundary conditions
نویسندگان
چکیده
We calculate the potential between two static quarks in QCD using modified boundary conditions for the perturbative expansion. Through a change of the Feynman iε prescription we effectively add a “sea” of gluons to the asymptotic states with energies below a given scale Λ. We find that the standard result for the static potential gets corrections of order Λ/Q both at small and large momentum transfers Q. After resummation of the infrared sensitive corrections we find that the running coupling αs(Q ) freezes in the infrared and that the exchanged gluon gets an effective tachyonic mass. We verify that identical results are obtained in the Coulomb and Feynman gauges. Typeset using REVTEX ∗[email protected] †[email protected] 1
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