Small x divergences in the Similarity RG approach to LF QCD

Details Small x divergences in the Similarity RG approach to LF QCD Small x divergences in the Similarity RG approach to LF QCD

2001-11-15

arxiv.org/abs/hep-ph/0111189v2

Mod.Phys.Lett. A17 (2002) 59-82

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pgs, 1 fig. Revised for publication: typos corrected, improved discussion of regularization

Scientific paper

10.1142/S0217732302006308

We study small x divergences in boost invariant similarity renormalization group approach to light-front QCD in a heavy quark-antiquark state. With the boost invariance maintained, the infrared divergences do not cancel out in the physical states, contrary to previous studies where boost invariance was violated by a choice of a renormalization scale. This may be an indication that the zero mode, or nontrivial light-cone vacuum structure, might be important for recovering full Lorentz invariance.

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