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Title: The importance of kinematic twists and genuine saturation effects in dijet production at the Electron-Ion Collider

Abstract

We compute the differential yield for quark anti-quark dijet production in high-energy electron-proton and electron-nucleus collisions at small x as a function of the relative momentum P and momentum imbalance k of the dijet system for different photon virtualities Q2, and study the elliptic and quadrangular anisotropies in the relative angle between P and k. We review and extend the analysis in [1], which compared the results of the Color Glass Condensate (CGC) with those obtained using the transverse momentum dependent (TMD) framework. In particular, we include in our comparison the improved TMD (ITMD) framework, which resums kinematic power corrections of the ratio k over the hard scale Q. By comparing ITMD and CGC results we are able to isolate genuine higher saturation contributions in the ratio Qs/Q which are resummed only in the CGC. These saturation contributions are in addition to those in the Weizsäcker-Williams gluon TMD that appear in powers of Qs/k. We provide numerical estimates of these contributions for inclusive dijet production at the future Electron-Ion Collider, and identify kinematic windows where they can become relevant in the measurement of dijet and dihadron azimuthal correlations. We argue that such measurements will allow the detailed experimental study ofmore » both kinematic power corrections and genuine gluon saturation effects.« less

Authors:
 [1];  [2]; ORCiD logo [3];  [4]
  1. Ecole Polytechnique, Palaiseau (France)
  2. Univ. of Jyvaskyla (Finland); Univ. of Helsinki (Finland)
  3. Stony Brook Univ., NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); Academy of Finland; European Commission (EC)
OSTI Identifier:
1822352
Report Number(s):
BNL-222162-2021-JAAM
Journal ID: ISSN 1029-8479; TRN: US2214461
Grant/Contract Number:  
SC0012704; AC02-05CH11231; 314764; 824093
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2021; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Nature
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; deep inelastic scattering (phenomenology); QCD phenomenology

Citation Formats

Boussarie, Renaud, Mäntysaari, Heikki, Salazar, Farid, and Schenke, Björn. The importance of kinematic twists and genuine saturation effects in dijet production at the Electron-Ion Collider. United States: N. p., 2021. Web. doi:10.1007/jhep09(2021)178.
Boussarie, Renaud, Mäntysaari, Heikki, Salazar, Farid, & Schenke, Björn. The importance of kinematic twists and genuine saturation effects in dijet production at the Electron-Ion Collider. United States. https://doi.org/10.1007/jhep09(2021)178
Boussarie, Renaud, Mäntysaari, Heikki, Salazar, Farid, and Schenke, Björn. Mon . "The importance of kinematic twists and genuine saturation effects in dijet production at the Electron-Ion Collider". United States. https://doi.org/10.1007/jhep09(2021)178. https://www.osti.gov/servlets/purl/1822352.
@article{osti_1822352,
title = {The importance of kinematic twists and genuine saturation effects in dijet production at the Electron-Ion Collider},
author = {Boussarie, Renaud and Mäntysaari, Heikki and Salazar, Farid and Schenke, Björn},
abstractNote = {We compute the differential yield for quark anti-quark dijet production in high-energy electron-proton and electron-nucleus collisions at small x as a function of the relative momentum P⊥ and momentum imbalance k⊥ of the dijet system for different photon virtualities Q2, and study the elliptic and quadrangular anisotropies in the relative angle between P⊥ and k⊥. We review and extend the analysis in [1], which compared the results of the Color Glass Condensate (CGC) with those obtained using the transverse momentum dependent (TMD) framework. In particular, we include in our comparison the improved TMD (ITMD) framework, which resums kinematic power corrections of the ratio k⊥ over the hard scale Q⊥. By comparing ITMD and CGC results we are able to isolate genuine higher saturation contributions in the ratio Qs/Q⊥ which are resummed only in the CGC. These saturation contributions are in addition to those in the Weizsäcker-Williams gluon TMD that appear in powers of Qs/k⊥. We provide numerical estimates of these contributions for inclusive dijet production at the future Electron-Ion Collider, and identify kinematic windows where they can become relevant in the measurement of dijet and dihadron azimuthal correlations. We argue that such measurements will allow the detailed experimental study of both kinematic power corrections and genuine gluon saturation effects.},
doi = {10.1007/jhep09(2021)178},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2021,
place = {United States},
year = {Mon Sep 27 00:00:00 EDT 2021},
month = {Mon Sep 27 00:00:00 EDT 2021}
}

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