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Title: 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

Abstract

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.

Authors:
;  [1];  [1];  [1]
  1. Department of Physics and Institute for Particle Physics Phenomenology, University of Durham, DH1 3LE (United Kingdom)
Publication Date:
OSTI Identifier:
20705337
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 70; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.70.074013; (c) 2004 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; COMPARATIVE EVALUATIONS; DISTRIBUTION; EMISSION; GLUONS; HADRONS; JET MODEL; QUANTUM CHROMODYNAMICS; SCATTERING; STANDARD MODEL; TRANSVERSE MOMENTUM

Citation Formats

Khoze, V A, Ryskin, M G, Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Martin, A D, Stirling, W J, and Department of Mathematical Sciences, University of Durham, DH1 3LE. 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. United States: N. p., 2004. Web. doi:10.1103/PhysRevD.70.074013.
Khoze, V A, Ryskin, M G, Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Martin, A D, Stirling, W J, & Department of Mathematical Sciences, University of Durham, DH1 3LE. 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. United States. https://doi.org/10.1103/PhysRevD.70.074013
Khoze, V A, Ryskin, M G, Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300, Martin, A D, Stirling, W J, and Department of Mathematical Sciences, University of Durham, DH1 3LE. Fri . "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". United States. https://doi.org/10.1103/PhysRevD.70.074013.
@article{osti_20705337,
title = {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},
author = {Khoze, V A and Ryskin, M G and Petersburg Nuclear Physics Institute, Gatchina, St. Petersburg, 188300 and Martin, A D and Stirling, W J and Department of Mathematical Sciences, University of Durham, DH1 3LE},
abstractNote = {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.},
doi = {10.1103/PhysRevD.70.074013},
url = {https://www.osti.gov/biblio/20705337}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 70,
place = {United States},
year = {2004},
month = {10}
}