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Title: Revisiting helicity parton distributions at a future electron-ion collider

Abstract

We studied the impact of future electron ion collider inclusive and semi-inclusive polarized deep inelastic scattering data will have on the determination of the helicity parton distributions. Supplementing the Monte Carlo sampling variant of the DSSV14 analysis with pseudodata on polarized inclusive and semi-inclusive electron-proton deep inelastic scattering with updated uncertainty estimates and for two different center-of-mass-system energies, √s = 44.7 GeV and √s = 141.4 GeV, respectively, and on inclusive electron-helium collisions at √s = 115.2 GeV, we find a remarkable improvement in the determination of the helicity distributions, especially at low parton momentum fraction x . While inclusive electron-proton data at the lowest energy configuration constrain significantly the gluon polarization down to x ~ 10–4, the higher energy configuration strengthens the constraint and extends it one decade further. On the other hand, semi-inclusive data achieves the hitherto elusive flavor separation for sea quarks that cannot be obtained from any other inclusive electromagnetic measurement. Collisions with helium complement inclusive proton measurements, pushing the constraints on the combined quark plus antiquark u, d and s polarizations to an unprecedented level.

Authors:
ORCiD logo; ; ORCiD logo; ORCiD logo; ORCiD logo
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
OSTI Identifier:
1756218
Alternate Identifier(s):
OSTI ID: 1737435
Report Number(s):
BNL-220717-2020-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ; 094018
Grant/Contract Number:  
de-sc0012704; SC0012704
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 102 Journal Issue: 9; 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

Borsa, Ignacio, Lucero, Gonzalo, Sassot, Rodolfo, Aschenauer, Elke C., and Nunes, Ana S.. Revisiting helicity parton distributions at a future electron-ion collider. United States: N. p., 2020. Web. https://doi.org/10.1103/PhysRevD.102.094018.
Borsa, Ignacio, Lucero, Gonzalo, Sassot, Rodolfo, Aschenauer, Elke C., & Nunes, Ana S.. Revisiting helicity parton distributions at a future electron-ion collider. United States. https://doi.org/10.1103/PhysRevD.102.094018
Borsa, Ignacio, Lucero, Gonzalo, Sassot, Rodolfo, Aschenauer, Elke C., and Nunes, Ana S.. Mon . "Revisiting helicity parton distributions at a future electron-ion collider". United States. https://doi.org/10.1103/PhysRevD.102.094018.
@article{osti_1756218,
title = {Revisiting helicity parton distributions at a future electron-ion collider},
author = {Borsa, Ignacio and Lucero, Gonzalo and Sassot, Rodolfo and Aschenauer, Elke C. and Nunes, Ana S.},
abstractNote = {We studied the impact of future electron ion collider inclusive and semi-inclusive polarized deep inelastic scattering data will have on the determination of the helicity parton distributions. Supplementing the Monte Carlo sampling variant of the DSSV14 analysis with pseudodata on polarized inclusive and semi-inclusive electron-proton deep inelastic scattering with updated uncertainty estimates and for two different center-of-mass-system energies, √s = 44.7 GeV and √s = 141.4 GeV, respectively, and on inclusive electron-helium collisions at √s = 115.2 GeV, we find a remarkable improvement in the determination of the helicity distributions, especially at low parton momentum fraction x . While inclusive electron-proton data at the lowest energy configuration constrain significantly the gluon polarization down to x ~ 10–4, the higher energy configuration strengthens the constraint and extends it one decade further. On the other hand, semi-inclusive data achieves the hitherto elusive flavor separation for sea quarks that cannot be obtained from any other inclusive electromagnetic measurement. Collisions with helium complement inclusive proton measurements, pushing the constraints on the combined quark plus antiquark u, d and s polarizations to an unprecedented level.},
doi = {10.1103/PhysRevD.102.094018},
journal = {Physical Review D},
number = 9,
volume = 102,
place = {United States},
year = {2020},
month = {11}
}

Journal Article:
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https://doi.org/10.1103/PhysRevD.102.094018

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