The W mass and the U parameter

Details The W mass and the U parameter The W mass and the U parameter

2003-04-22

arxiv.org/abs/hep-ph/0304203v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, 6 postscript figures. Talk presented by Takeuchi at SCGT'02, December 13, 2002, Nagoya, Japan. Uses ws-procs9x6.cls (

Scientific paper

The Z-pole data from e+e- colliders and results from the NuTeV experiment at Fermilab can be brought into agreement if (1) the neutrino-Z couplings were suppressed relative to the Standard Model (SM), and (2) the Higgs boson were much heavier than suggested by SM global fits. However, increasing the Higgs boson mass will move the theoretical value of the W mass away from its experimental value. A large and positive U parameter becomes necessary to account for the difference. We discuss what type of new physics may lead to such values of U.

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