Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-01-16
Phys.Lett.B674:291-294,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, no figures, references added
Scientific paper
10.1016/j.physletb.2009.03.033
We present updated predictions for the total cross section for Higgs boson production by gluon--gluon fusion in hadron collisions. Our calculation includes the most advanced theoretical information available at present for this observable: soft-gluon resummation up to next-to-next-to-leading logarithmic accuracy, the exact treatment of the bottom-quark contribution up to next-to-leading order, and two-loop electroweak effects. We adopt the most recent parametrization of parton distribution functions at next-to-next-to-leading order, and we evaluate the corresponding uncertainties. In comparison with our previous central predictions, at the Tevatron the difference ranges from +9% for m_H=115 GeV to -9% for m_H=200 GeV. At the LHC the cross section is instead significantly increased. The effect goes from +30% for m_H=115 GeV to +9% for m_H=300 GeV, and is mostly due to the new parton distribution functions. We also provide new predictions for the LHC at sqrt{s}=10 TeV.
de Florian Daniel
Grazzini Massimiliano
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