Standard model gauging of the Wess-Zumino-Witten term: Anomalies, global currents, and pseudo-Chern-Simons interactions

被引：51

作者：

Harvey, Jeffrey A. ^{[1
,2
]}

Hill, Christopher T. ^{[3
]}

Hill, Richard J. ^{[3
]}

机构：

[1] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[2] Univ Chicago, Dept Phys, Chicago, IL 60637 USA

[3] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 08期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.77.085017

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The standard model SU(2)(L)xU(1)(Y) gauging of the Wess-Zumino-Witten term requires a modified counterterm when background fields, needed to generate the full set of currents, are introduced. The modified counterterm plays an essential role in properly defining covariant global currents and their anomalies. For example, it is required in order to correctly derive the gauge-invariant baryon number current and its anomalous divergence. The background fields can also be promoted to a description of the physical spin-1 vector and axial-vector mesons in QCD and the counterterm leads to novel interactions. These are (pseudo)Chern-Simons terms, such as epsilon(mu nu rho sigma)omega(mu)Z(nu)partial derivative(rho)A(sigma) and epsilon(mu nu rho sigma)rho W-+/-(mu)nu(-/+)partial derivative(rho)A(sigma) that mediate new interactions between neutrinos and photons at finite baryon density.

引用

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