Abstract
It is shown that the bosonic contributions to the S, T, and U parameters, defined in terms of conventional self-energies, are gauge dependent in the Standard Model (SM). Moreover, T and U are divergent unless a constraint is imposed among the gauge parameters. Implications of this result for renormalization schemes of the SM are discussed. A gauge-invariant formulation of S, T, and U is proposed in the pinch-technique framework. The modified S, T, and U parameters provide a gauge-invariant parametrization of leading electroweak radiative corrections in the SM and some of its extensions. (orig.)
Degrassi, G;
[1]
Kniehl, B A;
[2]
Sirlin, A
[3]
- Universita degli Studi di Padova Dipartimento di Fisica `Galileo Galilei` (Italy)
- Hamburg Univ. (Germany). 2. Inst. fuer Theoretische Physik
- New York Univ., NY (United States). Dept. of Physics
Citation Formats
Degrassi, G, Kniehl, B A, and Sirlin, A.
Gauge-invariant formulation of the S, T, and U parameters.
Germany: N. p.,
1993.
Web.
Degrassi, G, Kniehl, B A, & Sirlin, A.
Gauge-invariant formulation of the S, T, and U parameters.
Germany.
Degrassi, G, Kniehl, B A, and Sirlin, A.
1993.
"Gauge-invariant formulation of the S, T, and U parameters."
Germany.
@misc{etde_10137904,
title = {Gauge-invariant formulation of the S, T, and U parameters}
author = {Degrassi, G, Kniehl, B A, and Sirlin, A}
abstractNote = {It is shown that the bosonic contributions to the S, T, and U parameters, defined in terms of conventional self-energies, are gauge dependent in the Standard Model (SM). Moreover, T and U are divergent unless a constraint is imposed among the gauge parameters. Implications of this result for renormalization schemes of the SM are discussed. A gauge-invariant formulation of S, T, and U is proposed in the pinch-technique framework. The modified S, T, and U parameters provide a gauge-invariant parametrization of leading electroweak radiative corrections in the SM and some of its extensions. (orig.)}
place = {Germany}
year = {1993}
month = {Jun}
}
title = {Gauge-invariant formulation of the S, T, and U parameters}
author = {Degrassi, G, Kniehl, B A, and Sirlin, A}
abstractNote = {It is shown that the bosonic contributions to the S, T, and U parameters, defined in terms of conventional self-energies, are gauge dependent in the Standard Model (SM). Moreover, T and U are divergent unless a constraint is imposed among the gauge parameters. Implications of this result for renormalization schemes of the SM are discussed. A gauge-invariant formulation of S, T, and U is proposed in the pinch-technique framework. The modified S, T, and U parameters provide a gauge-invariant parametrization of leading electroweak radiative corrections in the SM and some of its extensions. (orig.)}
place = {Germany}
year = {1993}
month = {Jun}
}