Unveiling the proton spin decomposition at a future electron-ion collider

Aschenauer, Elke C.; Sassot, Rodolfo; Stratmann, Marco

doi:10.1103/PhysRevD.92.094030

Title: Unveiling the proton spin decomposition at a future electron-ion collider

Abstract

We present a detailed assessment of how well a future electron-ion collider could constrain helicity parton distributions in the nucleon and, therefore, unveil the role of the intrinsic spin of quarks and gluons in the proton’s spin budget. Any remaining deficit in this decomposition will provide the best indirect constraint on the contribution due to the total orbital angular momenta of quarks and gluons. Specifically, all our studies are performed in the context of global QCD analyses based on realistic pseudodata and in the light of the most recent data obtained from polarized proton-proton collisions at BNL-RHIC that have provided evidence for a significant gluon polarization in the accessible, albeit limited range of momentum fractions. We also present projections on what can be achieved on the gluon’s helicity distribution by the end of BNL-RHIC operations. As a result, all estimates of current and projected uncertainties are performed with the robust Lagrange multiplier technique.

Authors:

Aschenauer, Elke C. ^[1]; Sassot, Rodolfo ^[2]; Stratmann, Marco ^[3]

Brookhaven National Lab. (BNL), Upton, NY (United States)
Univ. de Buenos Aires, Ciudad Univ., Buenos Aires (Argentina)
Univ. of Tubingen, Tubingen (Germany)

Publication Date:: Tue Nov 24 00:00:00 EST 2015

Research Org.:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

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

OSTI Identifier:: 1235888

Alternate Identifier(s):: OSTI ID: 1227038

Report Number(s):: BNL-111726-2016-JA
Journal ID: ISSN 1550-7998; PRVDAQ; R&D Project: PO 004; KB0202012

Grant/Contract Number:: SC00112704; SC0012704

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review. D, Particles, Fields, Gravitation and Cosmology

Additional Journal Information:: Journal Volume: 92; Journal Issue: 9; Journal ID: ISSN 1550-7998

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats


                    Aschenauer, Elke C., Sassot, Rodolfo, and Stratmann, Marco. Unveiling the proton spin decomposition at a future electron-ion collider.  United States: N. p., 2015. 
Web.  doi:10.1103/PhysRevD.92.094030.

Copy to clipboard


                    Aschenauer, Elke C., Sassot, Rodolfo, & Stratmann, Marco. Unveiling the proton spin decomposition at a future electron-ion collider.  United States.  https://doi.org/10.1103/PhysRevD.92.094030

Copy to clipboard


                    Aschenauer, Elke C., Sassot, Rodolfo, and Stratmann, Marco. Tue .  
"Unveiling the proton spin decomposition at a future electron-ion collider".  United States.  https://doi.org/10.1103/PhysRevD.92.094030.  https://www.osti.gov/servlets/purl/1235888.

Copy to clipboard


                    
@article{osti_1235888,

  title        = {Unveiling the proton spin decomposition at a future electron-ion collider},

  author       = {Aschenauer, Elke C. and Sassot, Rodolfo and Stratmann, Marco},

  abstractNote = {We present a detailed assessment of how well a future electron-ion collider could constrain helicity parton distributions in the nucleon and, therefore, unveil the role of the intrinsic spin of quarks and gluons in the proton’s spin budget. Any remaining deficit in this decomposition will provide the best indirect constraint on the contribution due to the total orbital angular momenta of quarks and gluons. Specifically, all our studies are performed in the context of global QCD analyses based on realistic pseudodata and in the light of the most recent data obtained from polarized proton-proton collisions at BNL-RHIC that have provided evidence for a significant gluon polarization in the accessible, albeit limited range of momentum fractions. We also present projections on what can be achieved on the gluon’s helicity distribution by the end of BNL-RHIC operations. As a result, all estimates of current and projected uncertainties are performed with the robust Lagrange multiplier technique.},

  doi          = {10.1103/PhysRevD.92.094030},

  journal      = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},

  number       = 9,

  volume       = 92,

  place        = {United States},

  year         = {Tue Nov 24 00:00:00 EST 2015},

  month        = {Tue Nov 24 00:00:00 EST 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1103/PhysRevD.92.094030

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 25 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

The spin structure of the nucleon
journal, April 2013

Aidala, Christine A.; Bass, Steven D.; Hasch, Delia
Reviews of Modern Physics, Vol. 85, Issue 2
DOI: 10.1103/RevModPhys.85.655

Deeply virtual Compton scattering at a proposed high-luminosity Electron-Ion Collider
journal, September 2013

Aschenauer, E. C.; Fazio, S.; Kumerički, K.
Journal of High Energy Physics, Vol. 2013, Issue 9
DOI: 10.1007/JHEP09(2013)093

Perspectives on Higgs Physics II
book, November 1997

Kane, Gordon L.
Advanced Series on Directions in High Energy Physics
DOI: 10.1142/ASDHEP

The angular momentum controversy: What’s it all about and does it matter?
journal, August 2014

Leader, Elliot; Lorcé, Cédric
Physics Reports, Vol. 541, Issue 3
DOI: 10.1016/j.physrep.2014.02.010

Helicity parton distributions at a future electron-ion collider: A quantitative appraisal
journal, September 2012

Aschenauer, Elke C.; Stratmann, Marco; Sassot, Rodolfo
Physical Review D, Vol. 86, Issue 5
DOI: 10.1103/PhysRevD.86.054020

Global Analysis of Helicity Parton Densities and their Uncertainties
journal, August 2008

de Florian, Daniel; Sassot, Rodolfo; Stratmann, Marco
Physical Review Letters, Vol. 101, Issue 7
DOI: 10.1103/PhysRevLett.101.072001

Extraction of spin-dependent parton densities and their uncertainties
journal, August 2009

de Florian, Daniel; Sassot, Rodolfo; Stratmann, Marco
Physical Review D, Vol. 80, Issue 3
DOI: 10.1103/PhysRevD.80.034030

Inclusive cross section and double helicity asymmetry for $π^{0}$ production in $p + p$ collisions at $\sqrt{s} = 62.4 GeV$
journal, January 2009

Adare, A.; Afanasiev, S.; Aidala, C.
Physical Review D, Vol. 79, Issue 1
DOI: 10.1103/PhysRevD.79.012003

Gluon-Spin Contribution to the Proton Spin from the Double-Helicity Asymmetry in Inclusive $π^{0}$ Production in Polarized $p + p$ Collisions at $\sqrt{s} = 200 GeV$
journal, July 2009

Adare, A.; Afanasiev, S.; Aidala, C.
Physical Review Letters, Vol. 103, Issue 1
DOI: 10.1103/PhysRevLett.103.012003

Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized $p + p$ collisions at $\sqrt{s} = 200 GeV$
journal, August 2012

Adamczyk, L.; Agakishiev, G.; Aggarwal, M. M.
Physical Review D, Vol. 86, Issue 3
DOI: 10.1103/PhysRevD.86.032006

Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200 GeV$
journal, January 2014

Adamczyk, L.; Adkins, J. K.; Agakishiev, G.
Physical Review D, Vol. 89, Issue 1
DOI: 10.1103/PhysRevD.89.012001

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at $\sqrt{s} = 200 GeV$
journal, August 2015

Adamczyk, L.; Adkins, J. K.; Agakishiev, G.
Physical Review Letters, Vol. 115, Issue 9
DOI: 10.1103/PhysRevLett.115.092002

Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in $\vec{p} + \vec{p}$ collisions at $\sqrt{s} = 200 GeV$
journal, July 2014

Adare, A.; Aidala, C.; Ajitanand, N. N.
Physical Review D, Vol. 90, Issue 1
DOI: 10.1103/PhysRevD.90.012007

Evidence for Polarization of Gluons in the Proton
journal, July 2014

de Florian, Daniel; Sassot, Rodolfo; Stratmann, Marco
Physical Review Letters, Vol. 113, Issue 1
DOI: 10.1103/PhysRevLett.113.012001

A first unbiased global determination of polarized PDFs and their uncertainties
journal, October 2014

Nocera, Emanuele R.; Ball, Richard D.; Forte, Stefano
Nuclear Physics B, Vol. 887
DOI: 10.1016/j.nuclphysb.2014.08.008

Next-to-leading order QCD corrections to high- $p_{T}$ pion production in longitudinally polarized $pp$ collisions
journal, March 2003

Jäger, B.; Schäfer, A.; Stratmann, M.
Physical Review D, Vol. 67, Issue 5
DOI: 10.1103/PhysRevD.67.054005

Single-inclusive jet production in polarized pp collisions at $O (α_{s}^{3})$
journal, August 2004

Jäger, B.; Stratmann, M.; Vogelsang, W.
Physical Review D, Vol. 70, Issue 3
DOI: 10.1103/PhysRevD.70.034010

Uncertainties of predictions from parton distribution functions. I. The Lagrange multiplier method
journal, December 2001

Stump, D.; Pumplin, J.; Brock, R.
Physical Review D, Vol. 65, Issue 1
DOI: 10.1103/PhysRevD.65.014012

Parton distributions for the LHC run II
journal, April 2015

Ball, Richard D.; Bertone, Valerio; Carrazza, Stefano
Journal of High Energy Physics, Vol. 2015, Issue 4
DOI: 10.1007/JHEP04(2015)040

Parton distributions in the LHC era: MMHT 2014 PDFs
journal, May 2015

Harland-Lang, L. A.; Martin, A. D.; Motylinski, P.
The European Physical Journal C, Vol. 75, Issue 5
DOI: 10.1140/epjc/s10052-015-3397-6

Parton-to-pion fragmentation reloaded
journal, January 2015

de Florian, Daniel; Sassot, R.; Epele, Manuel
Physical Review D, Vol. 91, Issue 1
DOI: 10.1103/PhysRevD.91.014035

Prospects for charged current deep-inelastic scattering off polarized nucleons at a future electron-ion collider
journal, December 2013

Aschenauer, Elke C.; Burton, Thomas; Stratmann, Marco
Physical Review D, Vol. 88, Issue 11
DOI: 10.1103/PhysRevD.88.114025

O ( $α_{s}$ ) spin-dependent weak structure functions
journal, June 1995

de Florian, D.; Sassot, R.
Physical Review D, Vol. 51, Issue 11
DOI: 10.1103/PhysRevD.51.6052

The calculation of the two-loop spin splitting functions P (1) ij ( x )
journal, May 1996

Mertig, R.; van Neerven, W. L.
Zeitschrift f�r Physik C Particles and Fields, Vol. 70, Issue 4
DOI: 10.1007/s002880050138

Rederivation of the spin-dependent next-to-leading order splitting functions
journal, August 1996

Vogelsang, Werner
Physical Review D, Vol. 54, Issue 3
DOI: 10.1103/PhysRevD.54.2023

The three-loop splitting functions in QCD: The helicity-dependent case
journal, December 2014

Moch, S.; Vermaseren, J. A. M.; Vogt, A.
Nuclear Physics B, Vol. 889
DOI: 10.1016/j.nuclphysb.2014.10.016

On $γ_{5}$ in higher-order QCD calculations and the NNLO evolution of the polarized valence distribution
journal, September 2015

Moch, S.; Vermaseren, J. A. M.; Vogt, A.
Physics Letters B, Vol. 748
DOI: 10.1016/j.physletb.2015.07.027

Polarized parton distributions at an electron–ion collider
journal, January 2014

Ball, Richard D.; Forte, Stefano; Guffanti, Alberto
Physics Letters B, Vol. 728
DOI: 10.1016/j.physletb.2013.12.023

QCD constraints on the shape of polarized quark and gluon distributions
journal, May 1995

Brodsky, Stanley J.; Burkardt, Matthias; Schmidt, Ivan
Nuclear Physics B, Vol. 441, Issue 1-2
DOI: 10.1016/0550-3213(95)00009-H

Quark orbital angular momentum from Wigner distributions and light-cone wave functions
journal, June 2012

Lorcé, Cédric; Pasquini, Barbara; Xiong, Xiaonu
Physical Review D, Vol. 85, Issue 11
DOI: 10.1103/PhysRevD.85.114006

Proton Spin Structure from Measurable Parton Distributions
journal, October 2012

Ji, Xiangdong; Xiong, Xiaonu; Yuan, Feng
Physical Review Letters, Vol. 109, Issue 15
DOI: 10.1103/PhysRevLett.109.152005

Probing parton orbital angular momentum in longitudinally polarized nucleon
journal, July 2013

Ji, Xiangdong; Xiong, Xiaonu; Yuan, Feng
Physical Review D, Vol. 88, Issue 1
DOI: 10.1103/PhysRevD.88.014041

Works referencing / citing this record:

The electron–ion collider: assessing the energy dependence of key measurements
journal, January 2019

Aschenauer, E. C.; Fazio, S.; Lee, J. H.
Reports on Progress in Physics, Vol. 82, Issue 2
DOI: 10.1088/1361-6633/aaf216

Towards ultimate parton distributions at the high-luminosity LHC
journal, November 2018

Khalek, Rabah Abdul; Bailey, Shaun; Gao, Jun
The European Physical Journal C, Vol. 78, Issue 11
DOI: 10.1140/epjc/s10052-018-6448-y

Towards Ultimate Parton Distributions at the High-Luminosity LHC
text, January 2018

Khalek, Rabah Abdul; Bailey, Shaun; Gao, Jun
arXiv
DOI: 10.48550/arxiv.1810.03639

Monte Carlo sampling variant of the DSSV14 set of helicity parton densities
text, January 2019

de Florian, Daniel; Lucero, Gonzalo Agustin; Sassot, Rodolfo
arXiv
DOI: 10.48550/arxiv.1902.10548

Similar Records in DOE PAGES and OSTI.GOV collections:

Revisiting helicity parton distributions at a future electron-ion collider

Journal Article Borsa, Ignacio ; Lucero, Gonzalo ; Sassot, Rodolfo ; ... - Physical Review D

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 inclusivemore »« less
https://doi.org/10.1103/PhysRevD.102.094018
Proton Spin Structure from Simultaneous Monte Carlo Global QCD Analysis

Thesis/Dissertation Zhou, Yiyu

Despite the great effort and achievements made towards understanding proton spin structure in the past few decades, a complete picture is still elusive. Parton distribution functions (PDFs), which in quantum chromodynamics (QCD) encode the momentum and helicity distributions of quarks and gluons inside a proton, provide the means by which to quantify the proton structure information. Being inherently nonperturbative, PDFs have to be extracted from unpolarized and polarized lepton-hadron and hadron-hadron scattering data. In particular, experiments that measure unpolarized and polarized jet observables can provide insight into the momentum and helicity distributions of gluons, which have generally been more difficultmore »« less
https://doi.org/10.21220/9K5N-4T96

Full Text Available
Extraction of spin-dependent parton densities and their uncertainties

Journal Article Florian, Daniel de ; Sassot, Rodolfo ; Stratmann, Marco ; ... - Physical Review. D, Particles Fields

We discuss techniques and results for the extraction of the nucleon's spin-dependent parton distributions and their uncertainties from data for polarized deep-inelastic lepton-nucleon and proton-proton scattering by means of a global QCD analysis. Computational methods are described that significantly increase the speed of the required calculations to a level that allows one to perform the full analysis consistently at next-to-leading order accuracy. We examine how the various data sets help to constrain different aspects of the quark, antiquark, and gluon helicity distributions. Uncertainty estimates are performed using both the Lagrange multiplier and the Hessian approaches. We use the extracted partonmore »« less
https://doi.org/10.1103/PHYSREVD.80.034030
PHENIX EXPERIMENT AT RHIC: DECADAL PLAN 2004-2013

Technical Report ZAJC,W.ET. AL.

The PHENIX Collaboration has developed a plan for the detailed investigation of quantum chromodynamics in the next decade. The demonstrated capabilities of the PHENIX experiment to measure rare processes in hadronic, leptonic and photonic channels, in combination with RHIC's unparalleled flexibility as a hadronic collider, provides a physics program of extraordinary breadth and depth. A superlative set of measurements to elucidate the states of both hot and cold nuclear matter, and to measure the spin structure of the proton has been identified. The components of this plan include: (1) Definitive measurements that will establish the nature of the matter createdmore »« less
https://doi.org/10.2172/15007043

Full Text Available
The Future Of Spin Physics At BNL

Journal Article Aronson, Samuel ; Deshpande, Abhay ; RIKEN BNL Research Center, BNL, Upton, NY 11973-5000 - AIP Conference Proceedings

The Relativistic Heavy Ion Collider (RHIC) at BNL is the world's only polarized proton-proton collider. Collisions at center-of-mass energies up to 500 GeV and beam polarizations approaching 70% (longitudinal or transverse) are provided to two experiments, STAR and PHENIX, at luminosities {>=} 1032/cm2/sec. Transverse polarized beam has also been provided to the BRAHMS experiment. Measurements that bear on the important question of the spin content of the nucleon are beginning to appear. Over the next 10 years, as the performance of polarized proton running at RHIC is farmer developed, the Spin Physics program at RHIC will provide definitive measurements ofmore »« less
https://doi.org/10.1063/1.2750761

Similar Records

Title: Unveiling the proton spin decomposition at a future electron-ion collider

Abstract

Citation Formats

The spin structure of the nucleon journal, April 2013

Deeply virtual Compton scattering at a proposed high-luminosity Electron-Ion Collider journal, September 2013

Perspectives on Higgs Physics II book, November 1997

The angular momentum controversy: What’s it all about and does it matter? journal, August 2014

Helicity parton distributions at a future electron-ion collider: A quantitative appraisal journal, September 2012

Global Analysis of Helicity Parton Densities and their Uncertainties journal, August 2008

Extraction of spin-dependent parton densities and their uncertainties journal, August 2009

Inclusive cross section and double helicity asymmetry for π 0 production in p + p collisions at s = 62.4 GeV journal, January 2009

Gluon-Spin Contribution to the Proton Spin from the Double-Helicity Asymmetry in Inclusive π 0 Production in Polarized p + p Collisions at s = 200 GeV journal, July 2009

Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized p + p collisions at s = 200 GeV journal, August 2012

Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at s = 200 GeV journal, January 2014

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at s = 200 GeV journal, August 2015

Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in p → + p → collisions at s = 200 GeV journal, July 2014

Evidence for Polarization of Gluons in the Proton journal, July 2014

A first unbiased global determination of polarized PDFs and their uncertainties journal, October 2014

Next-to-leading order QCD corrections to high- p T pion production in longitudinally polarized pp collisions journal, March 2003

Single-inclusive jet production in polarized pp collisions at O ( α s 3 ) journal, August 2004

Uncertainties of predictions from parton distribution functions. I. The Lagrange multiplier method journal, December 2001

Parton distributions for the LHC run II journal, April 2015

Parton distributions in the LHC era: MMHT 2014 PDFs journal, May 2015

Parton-to-pion fragmentation reloaded journal, January 2015

Prospects for charged current deep-inelastic scattering off polarized nucleons at a future electron-ion collider journal, December 2013

O ( α s ) spin-dependent weak structure functions journal, June 1995

The calculation of the two-loop spin splitting functions P (1) ij ( x ) journal, May 1996

Rederivation of the spin-dependent next-to-leading order splitting functions journal, August 1996

The three-loop splitting functions in QCD: The helicity-dependent case journal, December 2014

On γ 5 in higher-order QCD calculations and the NNLO evolution of the polarized valence distribution journal, September 2015

Polarized parton distributions at an electron–ion collider journal, January 2014

QCD constraints on the shape of polarized quark and gluon distributions journal, May 1995

Quark orbital angular momentum from Wigner distributions and light-cone wave functions journal, June 2012

Proton Spin Structure from Measurable Parton Distributions journal, October 2012

Probing parton orbital angular momentum in longitudinally polarized nucleon journal, July 2013

The electron–ion collider: assessing the energy dependence of key measurements journal, January 2019

Towards ultimate parton distributions at the high-luminosity LHC journal, November 2018

Towards Ultimate Parton Distributions at the High-Luminosity LHC text, January 2018

Monte Carlo sampling variant of the DSSV14 set of helicity parton densities text, January 2019

The spin structure of the nucleon
journal, April 2013

Deeply virtual Compton scattering at a proposed high-luminosity Electron-Ion Collider
journal, September 2013

Perspectives on Higgs Physics II
book, November 1997

The angular momentum controversy: What’s it all about and does it matter?
journal, August 2014

Helicity parton distributions at a future electron-ion collider: A quantitative appraisal
journal, September 2012

Global Analysis of Helicity Parton Densities and their Uncertainties
journal, August 2008

Extraction of spin-dependent parton densities and their uncertainties
journal, August 2009

Inclusive cross section and double helicity asymmetry for $π^{0}$ production in $p + p$ collisions at $\sqrt{s} = 62.4 GeV$
journal, January 2009

Gluon-Spin Contribution to the Proton Spin from the Double-Helicity Asymmetry in Inclusive $π^{0}$ Production in Polarized $p + p$ Collisions at $\sqrt{s} = 200 GeV$
journal, July 2009

Longitudinal and transverse spin asymmetries for inclusive jet production at mid-rapidity in polarized $p + p$ collisions at $\sqrt{s} = 200 GeV$
journal, August 2012

Neutral pion cross section and spin asymmetries at intermediate pseudorapidity in polarized proton collisions at $\sqrt{s} = 200 GeV$
journal, January 2014

Precision Measurement of the Longitudinal Double-Spin Asymmetry for Inclusive Jet Production in Polarized Proton Collisions at $\sqrt{s} = 200 GeV$
journal, August 2015

Inclusive double-helicity asymmetries in neutral-pion and eta-meson production in $\vec{p} + \vec{p}$ collisions at $\sqrt{s} = 200 GeV$
journal, July 2014

Evidence for Polarization of Gluons in the Proton
journal, July 2014

A first unbiased global determination of polarized PDFs and their uncertainties
journal, October 2014

Next-to-leading order QCD corrections to high- $p_{T}$ pion production in longitudinally polarized $pp$ collisions
journal, March 2003

Single-inclusive jet production in polarized pp collisions at $O (α_{s}^{3})$
journal, August 2004

Uncertainties of predictions from parton distribution functions. I. The Lagrange multiplier method
journal, December 2001

Parton distributions for the LHC run II
journal, April 2015

Parton distributions in the LHC era: MMHT 2014 PDFs
journal, May 2015

Parton-to-pion fragmentation reloaded
journal, January 2015

Prospects for charged current deep-inelastic scattering off polarized nucleons at a future electron-ion collider
journal, December 2013

O ( $α_{s}$ ) spin-dependent weak structure functions
journal, June 1995

The calculation of the two-loop spin splitting functions P (1) ij ( x )
journal, May 1996

Rederivation of the spin-dependent next-to-leading order splitting functions
journal, August 1996

The three-loop splitting functions in QCD: The helicity-dependent case
journal, December 2014

On $γ_{5}$ in higher-order QCD calculations and the NNLO evolution of the polarized valence distribution
journal, September 2015

Polarized parton distributions at an electron–ion collider
journal, January 2014

QCD constraints on the shape of polarized quark and gluon distributions
journal, May 1995

Quark orbital angular momentum from Wigner distributions and light-cone wave functions
journal, June 2012

Proton Spin Structure from Measurable Parton Distributions
journal, October 2012

Probing parton orbital angular momentum in longitudinally polarized nucleon
journal, July 2013

The electron–ion collider: assessing the energy dependence of key measurements
journal, January 2019

Towards ultimate parton distributions at the high-luminosity LHC
journal, November 2018

Towards Ultimate Parton Distributions at the High-Luminosity LHC
text, January 2018

Monte Carlo sampling variant of the DSSV14 set of helicity parton densities
text, January 2019