Making the small oblique parameters large

Details Making the small oblique parameters large Making the small oblique parameters large

1993-09-14

arxiv.org/abs/hep-ph/9309262v1

Phys.Rev. D49 (1994) 1409-1416

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, standard LATEX, 3 figures available from the authors, report CMU-HEP93-17 and DOE-ER/40682-42

Scientific paper

10.1103/PhysRevD.49.1409

We compute the oblique parameters, including the three new parameters $ V $, $ W $ and $ X $ introduced recently by the Montreal group, for the case of one scalar multiplet of arbitrary weak isospin $ J $ and weak hypercharge $ Y $. We show that, when the masses of the heaviest and lightest components of the multiplet remain constant, but $ J $ increases, the oblique parameter $ U $ and the three new oblique parameters increase like $ J^3 $, while $ T $ only increases like $ J $. For large multiplets with masses not much higher than $ m_Z $, the oblique parameters $ U $ and $ V $ may become much larger than $ T $ and $ S $.

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