Two-Loop Virtual Top-Quark Effect on Higgs-Boson Decay to Bottom Quarks

Journal Article · Fri Feb 16 00:00:00 EST 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.071602· OSTI ID:20955464

Butenschoen, Mathias; Fugel, Frank; Kniehl, Bernd A ^[1]

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1. II. Institut fuer Theoretische Physik, Universitaet Hamburg, Luruper Chaussee 149, 22761 Hamburg (Germany)

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(G{sub F}{sup 2}m{sub t}{sup 4}), to the partial width of this decay. It amplifies the familiar enhancement due to the O(G{sub F}m{sub t}{sup 2}) one-loop correction by about +16% and thus more than compensates the screening by about -8% through strong-interaction effects of order O({alpha}{sub s}G{sub F}m{sub t}{sup 2})

• OSTI ID: 20955464
• Journal Information: Physical Review Letters, Vol. 98, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.98.071602; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
B QUARKS
HIGGS BOSONS
PARTICLE DECAY
STANDARD MODEL
STRONG INTERACTIONS
T QUARKS