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Title: Next-to-leading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider

Abstract

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}}.

Authors:
; ; ; ;  [1]
  1. Institute of Theoretical Physics, Academia Sinica, Beijing 100080 (China)
Publication Date:
OSTI Identifier:
20709396
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 71; Journal Issue: 9; Other Information: DOI: 10.1103/PhysRevD.71.095004; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 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

Citation Formats

Ligang, Jin, Chongsheng, Li, Qiang, Li, Jianjun, Liu, Oakes, Robert J, Department of Physics, Peking University, Beijing 100871, and Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208-3112. Next-to-leading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider. United States: N. p., 2005. Web. doi:10.1103/PhysRevD.71.095004.
Ligang, Jin, Chongsheng, Li, Qiang, Li, Jianjun, Liu, Oakes, Robert J, Department of Physics, Peking University, Beijing 100871, & Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208-3112. Next-to-leading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider. United States. doi:10.1103/PhysRevD.71.095004.
Ligang, Jin, Chongsheng, Li, Qiang, Li, Jianjun, Liu, Oakes, Robert J, Department of Physics, Peking University, Beijing 100871, and Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208-3112. Sun . "Next-to-leading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider". United States. doi:10.1103/PhysRevD.71.095004.
@article{osti_20709396,
title = {Next-to-leading order QCD predictions for pair production of neutral Higgs bosons at the CERN Large Hadron Collider},
author = {Ligang, Jin and Chongsheng, Li and Qiang, Li and Jianjun, Liu and Oakes, Robert J and Department of Physics, Peking University, Beijing 100871 and Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208-3112},
abstractNote = {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}}.},
doi = {10.1103/PhysRevD.71.095004},
journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 9,
volume = 71,
place = {United States},
year = {2005},
month = {5}
}