Measuring the Weizsäcker-Williams distribution of linearly polarized gluons at an electron-ion collider through dijet azimuthal asymmetries

Dumitru, Adrian; Skokov, Vladimir; Ullrich, Thomas

doi:10.1103/physrevc.99.015204

Title: Measuring the Weizsäcker-Williams distribution of linearly polarized gluons at an electron-ion collider through dijet azimuthal asymmetries

Journal Article · Tue Jan 22 00:00:00 EST 2019 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.99.015204· OSTI ID:1491770

Dumitru, Adrian; Skokov, Vladimir; Ullrich, Thomas

The production of a hard dijet with small transverse momentum imbalance in semi-inclusive DIS probes the conventional and linearly polarized Weizsacker-Williams (WW) Transverse Momentum Dependent (TMD) gluon distributions. The latter, in particular, gives rise to an azimuthal dependence of the dijet cross-section. In this paper we analyze the feasibility of a measurement of these TMDs through dijet production in DIS on a nucleus at an Electron-Ion Collider. We introduce the MCDijet Monte-Carlo generator to sample quark-antiquark dijet configurations based on leading order parton level cross-sections with WW gluon distributions that solve the non-linear small-x QCD evolution equations. These configurations are fragmented to hadrons using PYTHIA, and final state jets are reconstructed. We report on background studies and on the effect of kinematic cuts introduced to remove beam jet remnants. We estimate that with an integrated luminosity of 20 fb^-1/A one can determine the distribution of linearly polarized gluons with a statistical accuracy of approximately 5%.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States); City Univ. of New York (CUNY), NY (United States)

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

Grant/Contract Number:: SC0002307; SC0012704; FG02-09ER41620; 60262-0048

OSTI ID:: 1491770

Alternate ID(s):: OSTI ID: 1473661; OSTI ID: 1659681

Report Number(s):: BNL-209049-2018-JAAM; 015204

Journal Information:: Physical Review. C, Journal Name: Physical Review. C Vol. 99 Journal Issue: 1; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 39 works

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