Two loop electroweak correction of O(G(F)M(t)**2) to the Higgs-boson decay into photons
May, 2004
15 pages
Published in:
- Nucl.Phys.B 702 (2004) 333-345
e-Print:
- hep-ph/0405232 [hep-ph]
Report number:
- DESY-04-040
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Abstract:
We compute the dominant two-loop electroweak correction, of O(G_F M_t^2), to the partial width of the decay of an intermediate-mass Higgs boson into a pair of photons. We use the asymptotic-expansion technique in order to extract the leading dependence on the top-quark mass plus four expansion terms that describe the dependence on the W- and Higgs-boson masses. This correction reduces the Born result by approximately 2.5%. As a by-product of our analysis, we also recover the O(G_F M_t^2) correction to the partial width of the Higgs-boson decay to two gluon jets.- 12.15.Ji
- 14.80.Bn
- 12.15.Lk
- Higgs particle: radiative decay
- Feynman graph: higher-order
- asymptotic expansion
- Higgs particle: width
- top: effect
- W: effect
- numerical calculations
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