THE WEAK MIXING ANGLE AND NEW PHYSICS (A TALE OF TWO NUMBERS)
Conference
·
OSTI ID:891296
The two best Z pole determinations of sin{sup 2} {theta}{sub W} (m{sub z}){sub {ovr MS}} differ by 3 sigma, a feature lost in global fits and averaging. Individually, sin{sup 2} {theta}{sub W}(m{sub Z}){sub {ovr MS}} = 0.2307(3) obtained from A{sub LR}, taken together with m{sub W} = 80.410(32) GeV, points to a very light Higgs boson, m{sub H} {approx_equal} 12-63 GeV, already ruled out experimentally. it is, however, easily redeemed by low mass scale supersymmetry or models with (effectively) S {approx_equal} -0.12 and T {approx_equal} +0.06. Alternatively, sin{sup 2} {theta}{sub W} (m{sub Z}){sub {ovr MS}} {approx_equal} 0.2320(3) obtained from A{sub FB}(Z {yields} {ovr bb}), suggests a very heavy Higgs, m{sub H} {approx} 500 GeV, along with S {approx_equal} +0.45 which is suggestive of Technicolor models. Future ways to resolve this discrepancy are briefly discussed.
- Research Organization:
- BROOKHAVEN NATIONAL LABORATORY
- Sponsoring Organization:
- DOE/SC
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 891296
- Report Number(s):
- BNL--77015-2006-CP; KA1401020
- Country of Publication:
- United States
- Language:
- English
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