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Electroweak quantum effects in theM w -M z relation

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Zeitschrift für Physik C Particles and Fields

Abstract

Quantum effects in theM w -M z relation are studied in the framework of the standard SU(2)×U(1) electroweak theory. After reviewing this relation in detail, numerical analysis is carried out by using recent data of ALEPH, DELPHI, L3, OPAL and MARK II collaborations onM z , and those of CDF and UA2 collaborations onM w . For the weighted averageM exp z =91.157±0.032 GeV, theW mass is calculated asM (0) w =80.90±0.04 GeV,M (l.l) w =79.75±0.04±0.02 GeV andM w =80.21±0.04±0.04 GeV at the tree, leading-log and full correction level (form top=140 GeV andm Higgs=100 GeV) respectively. Remarkable is that only the fully correctedM w is consistent withM exp w =80.24±0.37 GeV, which clearly demands the heavy top-quark correction, and therefore gives a strong phenomenological support, independent of the neutral current data, to the electroweak theory as a renormalizable quantum field theory with the spontaneous symmetry breakdown.

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  1. Department of Physics, College of General Education, University of Tokushima, 770, Tokushima, Japan

    Z. Hioki

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Hioki, Z. Electroweak quantum effects in theM w -M z relation. Z. Phys. C - Particles and Fields 49, 287–292 (1991). https://doi.org/10.1007/BF01555503

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