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arXiv 1709.09756hep-thhep-phmath-phmath.MPquant-ph
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Lorentz破坏QED中类Chern-Simons项的无辐射产生:处理IR发散

No radiative generation of Chern-Simons-like term in Lorentz-violating QED: dealing with IR divergences

O. M. Del Cima, D. H. T. Franco, O. Piguet

摘要:

在文献中,由于CPT破坏相互作用--费米子与恒定矢量场$b_\m$的轴向耦合--产生CPT奇和洛伦兹破坏的Chern-Simons类项的辐射校正的问题是错误的。由于无质量规范场的存在,激发了紫外减影可能产生的红外发散,因此,为了处理(实际物理的)红外发散,必须采用BPHZL重整化方法框架下的Lowenstein-Zimmermann减影方案。证明了在微扰论的所有阶上,不依赖于任何一种正则化方案,不生成这样的Chern-Simons-like项。

英文摘要:

The issue intensively claimed in the literature on the generation of a CPT-odd and Lorentz violating Chern-Simons-like term by radiative corrections owing to a CPT violating interaction -- the axial coupling of fermions with a constant vector field $b_\m$ -- is mistaken. The presence of massless gauge field triggers IR divergences that might show up from the UV subtractions, therefore, so as to deal with the (actual physical) IR divergences, the Lowenstein-Zimmermann subtraction scheme, in the framework of BPHZL renormalization method, has to be adopted. The proof on the non generation of such a Chern-Simons-like term is done, independent of any kind of regularization scheme, at all orders in perturbation theory.

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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