Phys. Rev. Lett. 98, 071602 (2007) [4 pages]Two-Loop Virtual Top-Quark Effect on Higgs-Boson Decay to Bottom QuarksReceived 14 December 2006; published 13 February 2007 In most of the mass range encompassed by the limits from the direct search and the electroweak precision tests, the Higgs boson of the standard model preferably decays to bottom quarks. We present, in analytic form, the dominant two-loop electroweak correction, of O(GF2mt4), to the partial width of this decay. It amplifies the familiar enhancement due to the O(GFmt2) one-loop correction by about +16% and thus more than compensates the screening by about -8% through strong-interaction effects of order O(αsGFmt2). © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.98.071602
DOI:
10.1103/PhysRevLett.98.071602
PACS:
11.10.Gh, 12.15.Ji, 12.15.Lk, 14.80.Bn
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