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arXiv · 1211.3027

Stringy excitation and role of UV gluons in lattice QCD

Hiroshi Ueda·Takahiro M. Doi·Sho Fujibayashi·Shoichiro Tsutsui·Takumi Iritani·Hideo Suganuma
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Abstract

Using SU(3) quenched lattice QCD, we study ground-state and low-lying even-parity excited-state potentials of quark-antiquark systems in terms of the gluon-momentum component in the Coulomb gauge. By introducing UV-cut in the gluon-momentum space, we investigate the "UV-gluon sensitivity" of the ground-state and excited-state potentials and the stringy excitation quantitatively. Even after cutting off high-momentum gluon component above 1.5GeV, the IR part of the ground-state potential is almost unchanged. On the other hand, the change of excited-state potential is more significant by the cut of UV-gluons. However, even after the removal of UV-gluons, the magnitude of the low-lying gluonic excitation remains to be of the order of 1GeV.

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Hiroshi Ueda, Takahiro M. Doi, Sho Fujibayashi, Shoichiro Tsutsui, Takumi Iritani, Hideo Suganuma. 2012-11-09. Stringy excitation and role of UV gluons in lattice QCD. https://arxiv.org/abs/1211.3027

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