2002/01/31 by V. Ravindran, J. Smith, W. L. van Neerven +1 · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1016/s0550-3213(02)00333-4
published as Nucl.Phys. B634 (2002) 247-290 · 53 pages, LaTeX, 22 postscript figures. Due to a wrong implementation of the MRST parton densities in our parton library all plots made by these densities are changed with respect to those published in Nucl. Phys. B634 (2002) 247-290. The new plots in figures 7,8 and 9 now agree with figures 1a and 2 in ref. 14. Further we have dropped Fig. 9b and Fig. 9a has been changed into Fig. 9 which agrees with Fig. 1a in ref. 14. Because of this agreement we have changed the text in section 6 between Eq. (6.20) and Eq. (6.21)
openalex publication_date 2002/07/01 · arxiv created 2002/09/02 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present the full next-to-leading order corrected differential distributions d2σ/dpT/dy, dσ/dpT and dσ/dy for the semi-inclusive process p + p→ H + 'X'. Here X denotes the inclusive hadronic state and pT and y are the transverse momentum and rapidity of the Higgs-boson H respectively. All QCD partonic subprocesses have been included. The computation is carried out in the limit that the top-quark mass mt → ∞ which is a very good approximation as long as mH,pT < 200 GeV. Our calculations reveal that the dominant subprocess is given by g + g → H + 'X' but the reaction g + q( q) → H + 'X' is not negligible. Another feature is that the K-factor representing the ratio between the next-to-leading order and leading order differential distributions is large. It varies from 1.4 to 1.7 depending on the kinematic region and choice of parton densities. We show that a reliable determination of the differential cross sections requires good knowledge of the gluon density in the region where x < 10-3. Further we study whether the differential distributions are dominated at large transverse momentum by soft-plus-virtual gluon contributions. This is of interest for the resummation of large corrections which occur near the boundary of phase space. We also compare our results with those previously reported in the literature.