Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC

Alvioli, M.; Frankfurt, L.; Perepelitsa, D. V.; Strikman, M.

doi:10.1103/PhysRevD.98.071502

Title: Global analysis of color fluctuation effects in proton– and deuteron–nucleus collisions at RHIC and the LHC

Journal Article · Thu Oct 11 00:00:00 EDT 2018 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.98.071502· OSTI ID:1477134

Alvioli, M.; Frankfurt, L.; Perepelitsa, D. V.; Strikman, M.

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.

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Research Organization:: Pennsylvania State Univ., University Park, PA (United States); Univ. of Colorado, Boulder, CO (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-93ER40771; SC0018117

OSTI ID:: 1477134

Alternate ID(s):: OSTI ID: 1610240; OSTI ID: 1671529

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Vol. 98 Journal Issue: 7; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 10 works

Citation information provided by
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