Which bosonic loop corrections are tested in electroweak precision measurements?

Dittmaier S, Schildknecht D, Weiglein G (1996)
In: ACTA PHYSICA POLONICA B. 27. POLISH ACAD SCIENCES INST PHYSICS: 2507-2524.

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Abstract
The nature of the electroweak bosonic loop corrections to which current precision experiments are sensitive is explored. The set of effective parameters Delta x, Delta y, and epsilon, which quantify SU(2) violation in an effective Lagrangian, is shown to be particularly useful for this purpose. The standard bosonic corrections are sizable only in the parameter Delta y, while Delta x and epsilon are sufficiently well approximated by the pure fermion-loop prediction. By analyzing the contributions to Delta y it is shown that the bosonic loop corrections resolved by the present precision data are induced by the change in energy scale between the low-energy process muon decay and the energy scale of the LEP1 observables. If the (theoretical value of the) leptonic width of the W boson is used as input parameter instead of the Fermi constant G(mu), no further bosonic loop corrections are necessary for compatibility between theory and experiment.
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Dittmaier S, Schildknecht D, Weiglein G. Which bosonic loop corrections are tested in electroweak precision measurements? In: ACTA PHYSICA POLONICA B. Vol 27. POLISH ACAD SCIENCES INST PHYSICS; 1996: 2507-2524.
Dittmaier, S., Schildknecht, D., & Weiglein, G. (1996). Which bosonic loop corrections are tested in electroweak precision measurements? ACTA PHYSICA POLONICA B, 27(10), 2507-2524.
Dittmaier, S., Schildknecht, D., and Weiglein, G. (1996). “Which bosonic loop corrections are tested in electroweak precision measurements?” in ACTA PHYSICA POLONICA B, vol. 27, (POLISH ACAD SCIENCES INST PHYSICS), 2507-2524.
Dittmaier, S., Schildknecht, D., & Weiglein, G., 1996. Which bosonic loop corrections are tested in electroweak precision measurements? In ACTA PHYSICA POLONICA B. no.27 POLISH ACAD SCIENCES INST PHYSICS, pp. 2507-2524.
S. Dittmaier, D. Schildknecht, and G. Weiglein, “Which bosonic loop corrections are tested in electroweak precision measurements?”, ACTA PHYSICA POLONICA B, vol. 27, POLISH ACAD SCIENCES INST PHYSICS, 1996, pp.2507-2524.
Dittmaier, S., Schildknecht, D., Weiglein, G.: Which bosonic loop corrections are tested in electroweak precision measurements? ACTA PHYSICA POLONICA B. 27, p. 2507-2524. POLISH ACAD SCIENCES INST PHYSICS (1996).
Dittmaier, S, Schildknecht, Dieter, and Weiglein, G. “Which bosonic loop corrections are tested in electroweak precision measurements?”. ACTA PHYSICA POLONICA B. POLISH ACAD SCIENCES INST PHYSICS, 1996.Vol. 27. 2507-2524.
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