HERA data and collinearly-improved BK dynamics

Autor: B. Ducloué, Edmond Iancu, D.N. Triantafyllopoulos, Gregory Soyez
Přispěvatelé: Institut de Physique Théorique - UMR CNRS 3681 (IPHT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), ANR-16-CE31-0019,DenseQCDatLHC,Etude du régime de haute densité partonique de QCD dans les collisions hadroniques au LHC(2016), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
Rok vydání: 2019
Předmět:
data analysis method
small-x
Nuclear and High Energy Physics
Particle physics
Logarithm
FOS: Physical sciences
01 natural sciences
DGLAP equation
coupling constant: energy dependence
High Energy Physics - Phenomenology (hep-ph)
Factorization
factorization
0103 physical sciences
Initial value problem
Rapidity
Resummation
010306 general physics
Quantum chromodynamics
Physics
010308 nuclear & particles physics
High Energy Physics::Phenomenology
Deep Inelastic Scattering
hep-ph
HERA
Balitsky-Kovchegov equation
Parton saturation
Deep inelastic scattering
deep inelastic scattering: inclusive reaction
QCD
lcsh:QC1-999
boundary condition
High Energy Physics - Phenomenology
DESY HERA Stor
rapidity
quality
resummation
evolution equation
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
High Energy Physics::Experiment
lcsh:Physics
dipole
Zdroj: Phys.Lett.B
Phys.Lett.B, 2020, 803, pp.135305. ⟨10.1016/j.physletb.2020.135305⟩
Physics Letters B
Physics Letters B, Elsevier, 2020, 803, pp.135305. ⟨10.1016/j.physletb.2020.135305⟩
Physics Letters
Ducloué, B, Iancu, E, Soyez, G & Triantafyllopoulos, D N 2020, ' HERA data and collinearly-improved BK dynamics ', Physics Letters B, vol. 803, 135305 . https://doi.org/10.1016/j.physletb.2020.135305
Physics Letters B, Vol 803, Iss, Pp-(2020)
ISSN: 0370-2693
DOI: 10.48550/arxiv.1912.09196
Popis: Within the framework of the dipole factorisation, we use a recent collinearly-improved version of the Balitsky-Kovchegov equation to fit the HERA data for inclusive deep inelastic scattering at small Bjorken $x$. The equation includes an all-order resummation of double and single transverse logarithms and running coupling corrections. Compared to similar equations previously proposed in the literature, this work makes a direct use of Bjorken $x$ as the rapidity scale for the evolution variable. We obtain excellent fits for reasonable values for the four fit parameters. We find that the fit quality improves when including resummation effects and a physically-motivated initial condition. In particular, the resummation of the DGLAP-like single transverse logarithms has a sizeable impact and allows one to extend the fit up to relatively large photon virtuality $Q^2$.
Comment: 16 pages, 4 figures, 2 tables
Databáze: OpenAIRE
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