Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC
Abstract
We test the hypothesis that configurations of a proton with a large-x parton, xp≳0.1, have a smaller than average size. The QCD Q2 evolution equations suggest that these small configurations also have a significantly smaller interaction strength, which has observable consequences in collisions with nuclei. We perform a global analysis of jet production data in proton- and deuteron-nucleus collisions at RHIC and the LHC. Using a model which takes a distribution of interaction strengths into account, we quantitatively extract the xp-dependence of the average interaction strength, σ(xp), over a wide kinematic range. By comparing the RHIC and LHC results, our analysis finds that the interaction strength for small configurations, while suppressed, grows faster with collision energy than does that for average configurations. We check that this energy dependence is consistent with the results of a method which, given σ(xp) at one energy, can be used to quantitatively predict that at another. This finding further suggests that at even lower energies, nucleons with a large-xp parton should interact much more weakly than those in an average configuration, a phenomenon in line with explanations of the EMC effect for large-xp quarks in nuclei based on color screening.
- Authors:
- Publication Date:
- Research Org.:
- Pennsylvania State Univ., University Park, PA (United States); Univ. of Colorado, Boulder, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1477134
- Alternate Identifier(s):
- OSTI ID: 1610240; OSTI ID: 1671529
- Grant/Contract Number:
- FG02-93ER40771; SC0018117
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 98 Journal Issue: 7; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Astronomy & astrophysics; physics; hard scattering; quantum chromodynamics; quark & gluon jets
Citation Formats
Alvioli, M., Frankfurt, L., Perepelitsa, D. V., and Strikman, M. Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.98.071502.
Alvioli, M., Frankfurt, L., Perepelitsa, D. V., & Strikman, M. Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC. United States. https://doi.org/10.1103/PhysRevD.98.071502
Alvioli, M., Frankfurt, L., Perepelitsa, D. V., and Strikman, M. Thu .
"Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC". United States. https://doi.org/10.1103/PhysRevD.98.071502.
@article{osti_1477134,
title = {Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC},
author = {Alvioli, M. and Frankfurt, L. and Perepelitsa, D. V. and Strikman, M.},
abstractNote = {We test the hypothesis that configurations of a proton with a large-x parton, xp≳0.1, have a smaller than average size. The QCD Q2 evolution equations suggest that these small configurations also have a significantly smaller interaction strength, which has observable consequences in collisions with nuclei. We perform a global analysis of jet production data in proton- and deuteron-nucleus collisions at RHIC and the LHC. Using a model which takes a distribution of interaction strengths into account, we quantitatively extract the xp-dependence of the average interaction strength, σ(xp), over a wide kinematic range. By comparing the RHIC and LHC results, our analysis finds that the interaction strength for small configurations, while suppressed, grows faster with collision energy than does that for average configurations. We check that this energy dependence is consistent with the results of a method which, given σ(xp) at one energy, can be used to quantitatively predict that at another. This finding further suggests that at even lower energies, nucleons with a large-xp parton should interact much more weakly than those in an average configuration, a phenomenon in line with explanations of the EMC effect for large-xp quarks in nuclei based on color screening.},
doi = {10.1103/PhysRevD.98.071502},
journal = {Physical Review. D.},
number = 7,
volume = 98,
place = {United States},
year = {Thu Oct 11 00:00:00 EDT 2018},
month = {Thu Oct 11 00:00:00 EDT 2018}
}
https://doi.org/10.1103/PhysRevD.98.071502
Web of Science
Figures / Tables:
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