Nexttoleading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider
Abstract
We present the calculations of the complete nexttoleadingorder (NLO) inclusive total cross sections for pair production of neutral Higgs bosons through bb¯ annihilation in the minimal supersymmetric standard model at the CERN Large Hadron Collider. In our calculations, we used both the dimensional regularization scheme and the dimensional reduction scheme and found that the NLO total cross sections in these two schemes are the same. Our results show that the bb¯annihilation contributions can exceed those of gg fusion and qq¯ annihilation for h^{0}H^{0}, A^{0}h^{0}, and A^{0}H^{0} productions when tan(β is large. In the case of μ>0, the NLO corrections enhance the leadingorder total cross sections significantly, reaching a few tens of percent, while for μ<0, the corrections are relatively small, and are negative in most of parameter space. Moreover, the NLO QCD corrections reduce the dependence of the total cross sections on the renormalization/factorization scale, especially for μ<0. We also used the CTEQ6.1 parton distribution function sets to estimate the uncertainty of leadingorder and NLO total cross sections, and found that the uncertainty arising from the choice of parton distribution functions increases with the increasing m_{A0}.
 Publication:

Physical Review D
 Pub Date:
 May 2005
 DOI:
 10.1103/PhysRevD.71.095004
 arXiv:
 arXiv:hepph/0501279
 Bibcode:
 2005PhRvD..71i5004J
 Keywords:

 12.60.Jv;
 12.38.Bx;
 13.85.Fb;
 Supersymmetric models;
 Perturbative calculations;
 Inelastic scattering: twoparticle final states;
 High Energy Physics  Phenomenology
 EPrint:
 43 pages, 16 figures, minor changes, some references added, a version to appear in PRD