Production of electroweak gauge bosons in off-shell gluon-gluon fusion

Journal Article · Tue Jul 01 04:00:00 EDT 2008 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.78.014025· OSTI ID:21250231

Baranov, S P ^[1]; Lipatov, A V; Zotov, N P ^[2]

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1. P.N. Lebedev Physics Institute, 119991 Moscow (Russian Federation)
2. D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, 119991 Moscow (Russian Federation)

We study the production of electroweak gauge bosons at high energies in the framework of k{sub T}-factorization QCD approach. The amplitude for production of a single W{sup {+-}} or Z{sup 0} boson associated with quark pair in the fusion of two off-shell gluons is calculated. Contributions from the valence quarks are calculated using the quark-gluon interaction and quark-antiquark annihilation QCD subprocesses. The total and differential cross sections (as a function of the transverse momentum and rapidity) are presented and the ratio of cross sections for W{sup {+-}} and Z{sup 0} boson production is investigated. The conservative error analysis is performed. In the numerical calculations two different sets of unintegrated gluon distributions in the proton are used: the one obtained from the Ciafaloni-Catani-Fiorani-Marchesini evolution equation and the other from the Kimber-Martin-Ryskin prescription. Theoretical results are compared with experimental data taken by the D0 and CDF collaborations at the Tevatron. We demonstrate the importance of the quark component in parton evolution in description of the experimental data. This component is very significant also at the LHC energies.

• OSTI ID: 21250231
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 1 Vol. 78; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BOSONS
CERN LHC
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
EQUATIONS
FACTORIZATION
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
GLUON-GLUON INTERACTIONS
GLUONS
NUMERICAL SOLUTION
PARTICLE PRODUCTION
PARTICLE RAPIDITY
PROTONS
QUANTUM CHROMODYNAMICS
QUARK-ANTIQUARK INTERACTIONS
QUARK-GLUON INTERACTIONS
QUARKS
TOTAL CROSS SECTIONS
TRANSVERSE MOMENTUM
VALENCE
W MINUS BOSONS
W PLUS BOSONS
WEINBERG-SALAM GAUGE MODEL
Z NEUTRAL BOSONS