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arXiv 1409.4795hep-ph
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有限温度下的质量重整化方案和微扰理论

Massive renormalization scheme and perturbation theory at finite temperature

Jean-Paul Blaizot, Nicolas Wschebor

摘要:

我们认为,选择适当的大规模重整化方案可以大大提高微扰理论在有限温度下的表观收敛性。这是说明的压力的标量场理论与四次相互作用的计算,在2圈的顺序。结果,几乎相同的,得到了更复杂的再结晶技术,显示了显着的稳定性作为耦合常数的增长,与标准微扰理论形成鲜明对比。

英文摘要:

We argue that the choice of an appropriate, massive, renormalization scheme can greatly improve the apparent convergence of perturbation theory at finite temperature. This is illustrated by the calculation of the pressure of a scalar field theory with quartic interactions, at 2-loop order. The result, almost identical to that obtained with more sophisticated resummation techniques, shows a remarkable stability as the coupling constant grows, in sharp contrast with standard perturbation theory.

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