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arXiv 1208.0601hep-phhep-th
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重粒子有效理论中的洛伦兹不变性

Lorentz invariance in heavy particle effective theories

Johannes Heinonen, Richard J. Hill, Mikhail P. Solon

摘要:

采用诱导表示的洛伦兹群(维格纳的小团体建设),形式主义的建设重粒子有效拉格朗日的发展,和拉格朗日约束,强制洛伦兹不变性的S矩阵的推导。建立了洛仑兹不变性与重参数化不变性之间的关系,并说明了为什么重费米子有效拉格朗日量中实现重参数化不变性的标准模在1/M^4阶时失效。给出了任意自旋场和自共轭场的形式,并讨论了无质量场有效理论的推广。

英文摘要:

Employing induced representations of the Lorentz group (Wigner's little group construction), formalism for constructing heavy particle effective Lagrangians is developed, and Lagrangian constraints enforcing Lorentz invariance of the S matrix are derived. The relationship between Lorentz invariance and reparameterization invariance is established and it is shown why a standard ansatz for implementing reparameterization invariance in heavy fermion effective Lagrangians breaks down at order 1/M^4. Formalism for fields of arbitrary spin and for self-conjugate fields is presented, and the extension to effective theories of massless fields is discussed.

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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