Confronting the impact parameter dependent JIMWLK evolution with HERA data
Abstract
The small-x evolution of protons is determined from numerical solutions of the JIMWLK equations, starting from an initial condition at moderate x for a finite size proton. The resulting dipole amplitude is used to calculate the total reduced cross section σr and charm reduced cross section σrc, as well as diffractive vector meson production. We compare results to experimental data from HERA and discuss fundamental problems arising from the regime sensitive to non-perturbative physics. We emphasize that information on the gluonic content of the proton, gluon spatial distributions and correlations over wide ranges in x, which can in principle be constrained by our study, are essential ingredients for describing the initial state in proton-proton and proton-ion collisions. Future electron nucleus collisions at an electron-ion collider will provide important additional insight for heavier nuclei. As a result, we further demonstrate that it is not possible to probe gluon saturation in electron-proton collision at HERA energies and that electron-heavy ion collisions will be essential to access the saturation regime.
- Authors:
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Under Secretary for Science and Energy (S-4)
- OSTI Identifier:
- 1464581
- Alternate Identifier(s):
- OSTI ID: 1471187
- Report Number(s):
- BNL-209041-2018-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 034013
- Grant/Contract Number:
- AC02-05CH11231; SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 98 Journal Issue: 3; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
Citation Formats
Mäntysaari, Heikki, and Schenke, Björn. Confronting the impact parameter dependent JIMWLK evolution with HERA data. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.034013.
Mäntysaari, Heikki, & Schenke, Björn. Confronting the impact parameter dependent JIMWLK evolution with HERA data. United States. https://doi.org/10.1103/PhysRevD.98.034013
Mäntysaari, Heikki, and Schenke, Björn. Tue .
"Confronting the impact parameter dependent JIMWLK evolution with HERA data". United States. https://doi.org/10.1103/PhysRevD.98.034013.
@article{osti_1464581,
title = {Confronting the impact parameter dependent JIMWLK evolution with HERA data},
author = {Mäntysaari, Heikki and Schenke, Björn},
abstractNote = {The small-x evolution of protons is determined from numerical solutions of the JIMWLK equations, starting from an initial condition at moderate x for a finite size proton. The resulting dipole amplitude is used to calculate the total reduced cross section σr and charm reduced cross section σrc, as well as diffractive vector meson production. We compare results to experimental data from HERA and discuss fundamental problems arising from the regime sensitive to non-perturbative physics. We emphasize that information on the gluonic content of the proton, gluon spatial distributions and correlations over wide ranges in x, which can in principle be constrained by our study, are essential ingredients for describing the initial state in proton-proton and proton-ion collisions. Future electron nucleus collisions at an electron-ion collider will provide important additional insight for heavier nuclei. As a result, we further demonstrate that it is not possible to probe gluon saturation in electron-proton collision at HERA energies and that electron-heavy ion collisions will be essential to access the saturation regime.},
doi = {10.1103/PhysRevD.98.034013},
journal = {Physical Review D},
number = 3,
volume = 98,
place = {United States},
year = {Tue Aug 14 00:00:00 EDT 2018},
month = {Tue Aug 14 00:00:00 EDT 2018}
}
https://doi.org/10.1103/PhysRevD.98.034013
Web of Science
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