ISSN:
1434-6052
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
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 z exp =91.157±0.032 GeV, theW mass is calculated asM w (0) =80.90±0.04 GeV,M w (l.l) =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 w exp =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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01555503
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