The effective electroweak mixing angle $\sin^2\theta_{eff}$ with two-loop fermionic contributions

W. Hollik; U. Meier; S. Uccirati

doi:10.1016/j.nuclphysb.2005.10.015

The effective electroweak mixing angle $\sin^2\theta_{eff}$ with two-loop fermionic contributions

高能物理 - 唯象学 2009-11-11 v2

作者: W. Hollik , U. Meier , S. Uccirati

在 arXiv 上查看 ↗ PDF ↗ DOI ↗

摘要

We present the results from a calculation of the full electroweak two-loop fermionic contributions to the effective leptonic mixing angle of the $Z$ boson, $\sin^2\theta_{eff}$ , in the Standard Model. On-shell renormalization and analytic calculations are performed for the three-point vertex functions at zero external momenta, whereas irreducible three-point integrals for non-vanishing external momenta are evaluated semi-analytically applying two different methods. Comparisons with a previous calculation show complete agreement.

引用

@article{arxiv.hep-ph/0507158,
  title  = {The effective electroweak mixing angle $\sin^2\theta_{eff}$ with two-loop fermionic contributions},
  author = {W. Hollik and U. Meier and S. Uccirati},
  journal= {arXiv preprint arXiv:hep-ph/0507158},
  year   = {2009}
}

备注

15 pages, 5 figures, reference added, few typos corrected

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