Renormalization group equation, the naturalness problem, and the understanding of the Higgs mass term

Renormalization group equation, the naturalness problem, and the understanding of the Higgs mass term
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重整化群方程、自然性问题以及希格斯质量项的理解

DOI:
10.1103/physrevd.88.056022
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发表时间:
2013-08
期刊:
Physical Review D - Particles, Fields, Gravitation and Cosmology
影响因子:
--
通讯作者:
Bian, Ligong
Bian, Ligong
中科院分区:
其他
文献类型:
--
作者:
Bian, Ligong

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利用量纲正则化(DREG)技术可以在复杂的二维平面上研究自然度问题。平面上Higgs质量的重整化群方程(RGE)表明,Higgs质量在紫外尺度下趋于零,当顶夸克极质量Mt=168$GeV时,该尺度可为Planck尺度。威尔逊重正化群方法意义上的自然度问题的真正问题不是二次发散,而是重标度效应。希格斯质量可以被认为是一个组成质量。在这种情况下,拉格朗日中的所有项都是边缘项,没有留下相关的项,因此不再有重新缩放效应来引起自然度问题。研究了朗道规范中真空期望值(VEV)在两圈量级以下的RGE。合成的希格斯质量的标度依赖行为表明,当$M_{t}\leq170.7$GeV时,即使在普朗克标度附近,我们也可以在高能标度下获得一个微小的希格斯质量。
The naturalness problem might be studied on the complex two dimensional plane with the technique of dimensional regularization(DREG). The Renormalization group equation(RGE) of the Higgs mass on the plane suggests the Higgs mass approaches zero at ultraviolate (UV) scale, the scale can be Planck scale when the top quark pole mass $M_{t}=168$ GeV. The real issue of the naturalness problem in the sense of Wilsonian renormalization group method is not about quadratic divergences but the rescaling effect. The Higgs mass can be considered to be one composed mass. All terms in the lagrangian in this scenario are marginal terms and no relevant terms are left, thus no rescaling effect to cause the naturalness problem anymore. RGE of the vacuum expectation value (VEV) in the Landau gauge up to two-loop order is studied. Scale-dependent behavior of the composed Higgs mass shows that we can have one tiny Higgs mass at high energy scale, even around the Planck scale, when $M_{t}\leq170.7$ GeV.
DOI: --
发表时间: 2009
期刊: --
影响因子: --
作者:
Z. Karpova;M. N. Sergeenko;V. Bednyakov
通讯作者: Z. Karpova;M. N. Sergeenko;V. Bednyakov
DOI: --
发表时间: 1995
期刊:
影响因子: --
作者:
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通讯作者: M. Peskin;Daniel V. Schroeder