THE WEAK MIXING ANGLE AND NEW PHYSICS (A TALE OF TWO NUMBERS)

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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 ... continued below

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MARCIANO, W. May 30, 2006.

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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.

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6 pages

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  • CONFERENCE ON THE INTERSECTIONS OF PARTICLE AND NUCLEAR PHYSICS (CIP ANP2006); RIO GRANDE, PUERTO RICO; 20060530 through 20060603

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  • Report No.: BNL--77015-2006-CP
  • Grant Number: DE-AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 891296
  • Archival Resource Key: ark:/67531/metadc875153

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  • May 30, 2006

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 12, 2016, 8:18 p.m.

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MARCIANO, W. THE WEAK MIXING ANGLE AND NEW PHYSICS (A TALE OF TWO NUMBERS), article, May 30, 2006; [Upton, New York]. (digital.library.unt.edu/ark:/67531/metadc875153/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.