Speaker
Mr
Mathias BUTENSCHÖN
(Universität Hamburg)
Description
In most of the mass range encompassed by the limits from the direct search and the
electroweak precision test, the Higgs boson of the standard model preferably decays
to bottom quarks. We calculated, in analytic form, the dominant two-loop electroweak
correction, of O(G_F^2 m_t^4), to the partial width of this decay. It amplifies the
familiar enhancement due to the O(G_F m_t^2) one-loop correction by about +16% and
thus more than compensates the screening by about -8% through strong-interaction
effects of O(alpha_s G_F m_t^2). In this talk I will present the results and describe
the most important conceptual and technical details.
Based on preprint
Phys. Rev. Lett. 98 (2007) 071602 [hep-ph/0612184]; Nucl. Phys. B 772 (2007) 25
[hep-ph/0702215]
Primary authors
Prof.
Bernd A. Kniehl
(Universität Hamburg)
Mr
Frank Fugel
(Universität Hamburg)
Mr
Mathias BUTENSCHÖN
(Universität Hamburg)
