Next-to-leading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider
- Institute of Theoretical Physics, Academia Sinica, Beijing 100080 (China)
We present the calculations of the complete next-to-leading-order (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{sup 0}H{sup 0}, A{sup 0}h{sup 0}, and A{sup 0}H{sup 0} productions when tan{beta} is large. In the case of {mu}>0, the NLO corrections enhance the leading-order total cross sections significantly, reaching a few tens of percent, while for {mu}<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 {mu}<0. We also used the CTEQ6.1 parton distribution function sets to estimate the uncertainty of leading-order and NLO total cross sections, and found that the uncertainty arising from the choice of parton distribution functions increases with the increasing m{sub A{sup 0}}.
- OSTI ID:
- 20709396
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 71, Issue 9; Other Information: DOI: 10.1103/PhysRevD.71.095004; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANNIHILATION
CERN LHC
CORRECTIONS
DISTRIBUTION FUNCTIONS
FACTORIZATION
GLUON-GLUON INTERACTIONS
HIGGS BOSONS
INCLUSIVE INTERACTIONS
INTERMEDIATE BOSONS
PAIR PRODUCTION
PARTON MODEL
PARTONS
PROTON-PROTON INTERACTIONS
QUANTUM CHROMODYNAMICS
QUARK-ANTIQUARK INTERACTIONS
RENORMALIZATION
REST MASS
STANDARD MODEL
SUPERSYMMETRY