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arXiv 1312.4258hep-th
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夸克反夸克势的TBA方程及其双圈展开

Reformulating the TBA equations for the quark anti-quark potential and their two loop expansion

Zoltan Bajnok, Janos Balog, Diego H. Correa, Arpad Hegedus, Fidel I. Schaposnik Massolo, Gabor Zsolt Toth

摘要:

在arXiv:1203.1913和arXiv:1203.1617中引入的边界热力学Bethe Answer(BTBA)方程描述尖点反常维数,该方程包含虚化学势和奇异边界逸度,这使得它的系统展开存在问题。我们提出了一种基于真实化学势和附加源项的替代公式。我们扩展我们的方程双包装秩序,并找到完全符合直接双圈规范理论计算的尖点反常维数。

英文摘要:

The boundary thermodynamic Bethe Ansatz (BTBA) equations introduced in arXiv:1203.1913 and arXiv:1203.1617 to describe the cusp anomalous dimension contain imaginary chemical potentials and singular boundary fugacities, which make its systematic expansion problematic. We propose an alternative formulation based on real chemical potentials and additional source terms. We expand our equations to double wrapping order and find complete agreement with the direct two-loop gauge theory computation of the cusp anomalous dimension.

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