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arXiv 1708.03061hep-phastro-ph.COhep-th
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具有6维算子的电弱Sphaleron

Electroweak Sphaleron with Dimension-6 Operators

Xucheng Gan, Andrew J. Long, Lian-Tao Wang

摘要:

TeV量级的新物理可以在许多方面影响电弱相变的动力学。在本文中,我们评估了它的影响的重子数违反率通过sphaleron过渡。我们用6维算子参数化新物理的影响,并使用Newton-Kantorovich方法数值求解所得的运动方程。根据6维算子系数的符号,它们的存在可以在百分之几的水平上增加或减少sphaleron能量,参数化为$m_W^2 / Λ^2$阶,其中$Λ$是抑制6维算子的尺度。重子数洗出条件,通常写为$v_c / T_c > 1$,是直接成比例的sphaleron能量,我们讨论了如何存在的维6运营商可以影响电弱重子。

英文摘要:

New physics at the TeV scale can affect the dynamics of the electroweak phase transition in many ways. In this note, we evaluate its impact on the rate of baryon-number violation via sphaleron transitions. We parameterize the effect of new physics with dimension-6 operators, and we use the Newton-Kantorovich method to numerically solve the resulting equations of motion. Depending on the sign of the coefficient of the dimension-6 operators, their presence can either increase or decrease the sphaleron energy at the level of a few percent, parametrically of order $m_W^2 / Λ^2$ where $Λ$ is the scale suppressing the dimension-6 operator. The baryon-number washout condition, typically written as $v_c / T_c > 1$, is directly proportional to the sphaleron energy, and we discuss how the presence of dimension-6 operators can affect electroweak baryogenesis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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