Next-to-leading order QCD predictions for W+3-jet distributions at hadron colliders

Journal Article · Thu Oct 01 00:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.80.074036· OSTI ID:21325251

Berger, C F ^[1]; Bern, Z; Cordero, F Febres; Ita, H ^[2]; Dixon, L J; Forde, D; Gleisberg, T ^[3]; Kosower, D A ^[4]; Maitre, D ^[5]

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1. Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
2. Department of Physics and Astronomy, UCLA, Los Angeles, California 90095-1547 (United States)
3. SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309 (United States)
4. Institut de Physique Theorique, CEA-Saclay, F-91191 Gif-sur-Yvette cedex (France)
5. Department of Physics, University of Durham, DH1 3LE (United Kingdom)

We present next-to-leading order QCD predictions for a variety of distributions in W+3-jet production at both the Tevatron and the Large Hadron Collider. We include all subprocesses and incorporate the decay of the W boson into leptons. Our results are in excellent agreement with existing Tevatron data and provide the first quantitatively precise next-to-leading order predictions for the LHC. We include all terms in an expansion in the number of colors, confirming that the specific leading-color approximation used in our previous study is accurate to within 3%. The dependence of the cross section on renormalization and factorization scales is reduced significantly with respect to a leading-order calculation. We study different dynamical scale choices, and find that the total transverse energy is significantly better than choices used in previous phenomenological studies. We compute the one-loop matrix elements using on-shell methods, as numerically implemented in the BlackHat code. The remaining parts of the calculation, including generation of the real-emission contributions and integration over phase space, are handled by the SHERPA package.

• OSTI ID: 21325251
• Journal Information: Physical Review. D, Particles Fields, Vol. 80, Issue 7; Other Information: DOI: 10.1103/PhysRevD.80.074036; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
CERN LHC
COLOR MODEL
CROSS SECTIONS
EMISSION
EXPANSION
FACTORIZATION
FERMILAB TEVATRON
FORECASTING
HADRONS
LEPTONS
MATRIX ELEMENTS
PARTICLE DECAY
PARTICLE PRODUCTION
PHASE SPACE
QUANTUM CHROMODYNAMICS
RENORMALIZATION
SIMULATION
W MINUS BOSONS
W PLUS BOSONS