Spread of the gluon k{sub t} distribution and the determination of the saturation scale at hadron colliders in the resummed next-to-leading logarithmic BFKL evolution

Journal Article · Fri Oct 01 04:00:00 EDT 2004 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.70.074013· OSTI ID:20705337

Khoze, V A; Ryskin, M G ^[1]; Martin, A D ^[1]; Stirling, W J ^[1]

---

1. Department of Physics and Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE (United Kingdom)

The transverse momentum distribution of soft hadrons and jets that accompany central hard-scattering production at hadron colliders is of great importance, since it has a direct bearing on the ability to separate new-physics signals from Standard Model backgrounds. We compare the predictions for the gluonic k{sub t}-distribution using two different approaches: resummed Next-to-Leading-Logarithm (NLL) Balitsky-Fadin-Kuraev-Lipatov (BFKL) and Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) evolution. We find that as long as the initial and final virtualities (k{sub t}) along the emission chain are not too close to each other, the NLL resummed BFKL results do not differ significantly from those obtained using standard DGLAP evolution. The saturation momentum Q{sub s}(x), calculated within the resummed BFKL approach, grows with 1/x even slower than in the leading-order DGLAP case.

• OSTI ID: 20705337
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 70; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPARATIVE EVALUATIONS
DISTRIBUTION
EMISSION
GLUONS
HADRONS
JET MODEL
QUANTUM CHROMODYNAMICS
SCATTERING
STANDARD MODEL
TRANSVERSE MOMENTUM