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arXiv 1201.4590hep-thhep-lathep-ph
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Gribov视界与单圈色库仑势

The Gribov horizon and the one-loop color-Coulomb potential

Maarten Golterman, Jeff Greensite, Santiago Peris, Adam P. Szczepaniak

摘要:

我们重新计算了色库仑势到单圈阶,假设Gribov视界的作用是使i)横胶子传播子的奇异性降低; ii)色库仑势的奇异性增加,而不是它们在低动量极限下的微扰行为。作为第一个猜测,Gribov视界的效果是模仿通过引入一个横向动量依赖胶子质量项,导致传播的Gribov形式,处方的质量参数应调整到唯一的值,其中的库仑势的红外行为是增强。我们发现,这一过程导致库仑势上升渐近作为一个线性项修改的对数。

英文摘要:

We recalculate the color-Coulomb potential to one-loop order, under the assumption that the effect of the Gribov horizon is to make i) the transverse gluon propagator less singular; and ii) the color-Coulomb potential more singular, than their perturbative behavior in the low-momentum limit. As a first guess, the effect of the Gribov horizon is mimicked by introducing a transverse momentum-dependent gluon mass term, leading to a propagator of the Gribov form, with the prescription that the mass parameter should be adjusted to the unique value where the infrared behavior of the Coulomb potential is enhanced. We find that this procedure leads to a Coulomb potential rising asymptotically as a linear term modified by a logarithm.

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