Jian Wang, Chong Sheng Li, Zhao Li, C. -P. Yuan, Hai Tao Li
We improve the resummation formula in ResBos for Higgs boson production by including NNLO Wilson coefficient functions and G-functions, which leads to increasing the total cross section prediction of ResBos for Higgs production by about 8% at the Tevatron and about 6% at the LHC. The HNNLO predictions at NNLO and the HqT predictions with NNLL+NLO accuracy are consistent with our results, i.e. the improved ResBos prediction, within a couple of percent for total Higgs production cross sections at both the Tevatron and LHC. For the transverse momentum distribution, the improved predictions of ResBos generally increase the overall size of the distribution. Especially, the improvement in the small transverse momentum region can be as large as 20% at both the Tevatron and LHC, but the peak position is not changed. The HqT predictions for the transverse momentum distribution at the LHC are almost the same as the improved ResBos, except that at the Tevatron the peak height of the HqT prediction is a little lower than that of the improved ResBos by about 2%. The G-functions can only modify the shape of transverse momentum distribution within 1%. Besides, we investigate the dependence of the transverse momentum distribution for Higgs production on the non-perturbative coefficients, which can slightly change the peak position and height of the distribution.
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http://arxiv.org/abs/1205.4311
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