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arXiv 1902.08402hep-th
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有限温度下$e^{-}\!\!+\!e^{+}\!\rightarrow\!μ^{-}\!\!+\!μ^{+}$散射中的Lorentz破坏

On Lorentz violation in $e^{-}\!\!+\!e^{+}\!\rightarrow\!μ^{-}\!\!+\!μ^{+}$ scattering at finite temperature

P. R. A. Souza, A. F. Santos, S. C. Ulhoa, F. C. Khanna

摘要:

在将引力与其他自然力统一起来的模型中,可能会出现对洛伦兹和CPT对称性的微小破坏。扩展的标准模型与所有可能的条款,违反洛伦兹和CPT对称性。这里,CPT偶非最小耦合项被添加到协变导数。这导致了一个新的相互作用项,打破了洛伦兹对称性。我们的主要目标是计算的$e^{-}\!\!+\!e^{+}\!\rightarrow\!μ^{-}\!\!+\!μ^{+}$散射截面,以调查任何违反洛伦兹和/或CPT对称性在有限温度下。热场动力学的形式主义是用来考虑有限的温度效应。

英文摘要:

Small violation of Lorentz and CPT symmetries may emerge in models unifying gravity with other forces of nature. An extension of the standard model with all possible terms that violate Lorentz and CPT symmetries are included. Here a CPT-even non-minimal coupling term is added to the covariant derivative. This leads to a new interaction term that breaks the Lorentz symmetry. Our main objective is to calculate the cross section for the $e^{-}\!\!+\!e^{+}\!\rightarrow\!μ^{-}\!\!+\!μ^{+}$ scattering in order to investigate any violation of Lorentz and/or CPT symmetry at finite temperature. Thermo Field Dynamics formalism is used to consider finite temperature effects.

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