Top Quark Mediated Higgs Boson Decay into Hadrons to Order {alpha}{sub s}{sup 5}

Journal Article · Fri Aug 11 04:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.061803· OSTI ID:20860632

Baikov, P A ^[1]; Chetyrkin, K G ^[2]

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1. Skobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow 119992 (Russian Federation)
2. Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)

We present in analytic form the O({alpha}{sub s}{sup 5}) correction to the H{yields}gg partial width of the standard-model Higgs boson with an intermediate mass M{sub H}<2M{sub t}. Its knowledge is useful because the O({alpha}{sub s}{sup 4}) correction is sizable (around 20%). For M{sub H}=120 GeV, the resulting QCD correction factor reads 1+(215/12){alpha}{sub s}{sup (5)}(M{sub H})/{pi}+152.5[{alpha}{sub s}{sup (5)}(M{sub H})/{pi}]{sup 2}+381.5[{alpha}{sub s}{sup (5)}(M{sub H})/{pi}]{sup 3}{approx_equal} 1+0.65+0.20+0.02. The new four-loop correction increases the total Higgs-boson hadronic width by a small amount of order 1 per mille and stabilizes significantly the residual scale dependence.

• OSTI ID: 20860632
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRECTIONS
GEV RANGE 100-1000
HADRONS
HIGGS BOSONS
MASS
PARTICLE DECAY
PARTICLE WIDTHS
QUANTUM CHROMODYNAMICS
STANDARD MODEL
T QUARKS