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arXiv 1207.6963hep-thastro-ph.COgr-qc
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FLRW中阿贝尔Higgs模型的有效action

Effective action for the Abelian Higgs model in FLRW

Damien P. George, Sander Mooij, Marieke Postma

摘要:

我们计算了U(1)阿贝尔Higgs模型的单圈作用量的发散贡献。计算考虑了Friedmann-Lemaitre-Robertson-Walker时空和标量场的依赖于时间的期望值。将随时间变化的质量视为两点相互作用,我们使用的形式主义计算的一阶,二阶和三阶图形,有助于二次和对数发散的有效标量作用。在R-xi规范中,我们证明了利用运动方程得到的结果是规范不变的。

英文摘要:

We compute the divergent contributions to the one-loop action of the U(1) Abelian Higgs model. The calculation allows for a Friedmann-Lemaitre-Robertson-Walker space-time and a time-dependent expectation value for the scalar field. Treating the time-dependent masses as two-point interactions, we use the in-in formalism to compute the first, second and third order graphs that contribute quadratic and logarithmic divergences to the effective scalar action. Working in R-xi gauge we show that the result is gauge invariant upon using the equations of motion.

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