Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized He3 target

Zhang, Y.; Qian, X.; Allada, K.; Dutta, C.; Huang, J.; Katich, J.; Wang, Y.; Aniol, K.; Annand, J. R.  M.; Averett, T.; Benmokhtar, F.; Bertozzi, W.; Bradshaw, P. C.; Bosted, P.; Camsonne, A.; Canan, M.; Cates, G. D.; Chen, C.; Chen, J. -P.; Chen, W.; Chirapatpimol, K.; Chudakov, E.; Cisbani, E.; Cornejo, J. C.; Cusanno, F.; Dalton, M. M.; Deconinck, W.; de Jager, C. W.; De Leo, R.; Deng, X.; Deur, A.; Ding, H.; Dolph, P. A.  M.; Dutta, D.; El Fassi, L.; Frullani, S.; Gao, H.; Garibaldi, F.; Gaskell, D.; Gilad, S.; Gilman, R.; Glamazdin, O.; Golge, S.; Guo, L.; Hamilton, D.; Hansen, O.; Higinbotham, D. W.; Holmstrom, T.; Huang, M.; Ibrahim, H. F.; Iodice, M.; Jiang, X.; Jin, G.; Jones, M. K.; Kelleher, A.; Kim, W.; Kolarkar, A.; Korsch, W.; LeRose, J. J.; Li, X.; Li, Y.; Lindgren, R.; Liyanage, N.; Long, E.; Lu, H. -J.; Margaziotis, D. J.; Markowitz, P.; Marrone, S.; McNulty, D.; Meziani, Z. -E.; Michaels, R.; Moffit, B.; Muñoz Camacho, C.; Nanda, S.; Narayan, A.; Nelyubin, V.; Norum, B.; Oh, Y.; Osipenko, M.; Parno, D.; Peng, J. C.; Phillips, S. K.; Posik, M.; Puckett, A. J.  R.; Qiang, Y.; Rakhman, A.; Ransome, R. D.; Riordan, S.; Saha, A.; Sawatzky, B.; Schulte, E.; Shahinyan, A.; Shabestari, M. H.; Širca, S.; Stepanyan, S.; Subedi, R.; Sulkosky, V.; Tang, L. -G.; Tobias, W. A.; Urciuoli, G. M.; Vilardi, I.; Wang, K.; Wojtsekhowski, B.; Yan, X.; Yao, H.; Ye, Y.; Ye, Z.; Yuan, L.; Zhan, X.; Zhang, Y. -W.; Zhao, B.; Zheng, X.; Zhu, L.; Zhu, X.; Zong, X.

doi:10.1103/PhysRevC.90.055209

Title: Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized ${}^{3}{He}$ target

Abstract

An experiment to measure single-spin asymmetries in semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized ³He target was performed at Jefferson Lab in the kinematic region of 0.16<0.35 and 1.4 < Q² < 2.7 GeV². The pretzelosity asymmetries on ³He, which can be expressed as the convolution of the $$h^⊥_{1T}$$ transverse momentum dependent distribution functions and the Collins fragmentation functions in the leading order, were measured for the first time. Using the effective polarization approximation, we extracted the corresponding neutron asymmetries from the measured ³He asymmetries and cross-section ratios between the proton and ³He. Our results show that for both π^± on ³He and on the neutron the pretzelosity asymmetries are consistent with zero within experimental uncertainties.

Authors:: Zhang, Y.; Qian, X.; Allada, K.; Dutta, C.; Huang, J.; Katich, J.; Wang, Y.; Aniol, K.; Annand, J. R. M.; Averett, T.; Benmokhtar, F.; Bertozzi, W.; Bradshaw, P. C.; Bosted, P.; Camsonne, A.; Canan, M.; Cates, G. D.; Chen, C.; Chen, J. -P.; Chen, W. more »« less

Publication Date:: Tue Nov 11 00:00:00 EST 2014

Research Org.:: Mississippi State Univ., Mississippi State, MS (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Nuclear Physics (NP); National Natural Science Foundation of China (NSFC)

Contributing Org.:: Jefferson Lab Hall A Collaboration

OSTI Identifier:: 1599860

Alternate Identifier(s):: OSTI ID: 1167677; OSTI ID: 1180814

Report Number(s):: JLAB/PHY-13-1832; DOE/OR/23177-2949
Journal ID: ISSN 0556-2813; PRVCAN; 6623253105; TRN: US2103509

Grant/Contract Number:: FG02-07ER41528; AC05-06OR23177; 11135002; 11120101004

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review C, Nuclear Physics

Additional Journal Information:: Journal Volume: 90; Journal Issue: 5; Journal ID: ISSN 0556-2813

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; spin asymmetry; nucleon; quantum chromodynamics (QCD); deep-inelastic scattering (DIS); orbital angular momentum; quarks

Citation Formats


                    Zhang, Y., Qian, X., Allada, K., Dutta, C., Huang, J., Katich, J., Wang, Y., Aniol, K., Annand, J. R.  M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A.  M., Dutta, D., El Fassi, L., Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, M., Ibrahim, H. F., Iodice, M., Jiang, X., Jin, G., Jones, M. K., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Muñoz Camacho, C., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. C., Phillips, S. K., Posik, M., Puckett, A. J.  R., Qiang, Y., Rakhman, A., Ransome, R. D., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, W. A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X. Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized He3 target.  United States: N. p., 2014. 
Web.  doi:10.1103/PhysRevC.90.055209.

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                    Zhang, Y., Qian, X., Allada, K., Dutta, C., Huang, J., Katich, J., Wang, Y., Aniol, K., Annand, J. R.  M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A.  M., Dutta, D., El Fassi, L., Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, M., Ibrahim, H. F., Iodice, M., Jiang, X., Jin, G., Jones, M. K., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Muñoz Camacho, C., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. C., Phillips, S. K., Posik, M., Puckett, A. J.  R., Qiang, Y., Rakhman, A., Ransome, R. D., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, W. A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., & Zong, X. Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized He3 target.  United States.  https://doi.org/10.1103/PhysRevC.90.055209

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                    Zhang, Y., Qian, X., Allada, K., Dutta, C., Huang, J., Katich, J., Wang, Y., Aniol, K., Annand, J. R.  M., Averett, T., Benmokhtar, F., Bertozzi, W., Bradshaw, P. C., Bosted, P., Camsonne, A., Canan, M., Cates, G. D., Chen, C., Chen, J. -P., Chen, W., Chirapatpimol, K., Chudakov, E., Cisbani, E., Cornejo, J. C., Cusanno, F., Dalton, M. M., Deconinck, W., de Jager, C. W., De Leo, R., Deng, X., Deur, A., Ding, H., Dolph, P. A.  M., Dutta, D., El Fassi, L., Frullani, S., Gao, H., Garibaldi, F., Gaskell, D., Gilad, S., Gilman, R., Glamazdin, O., Golge, S., Guo, L., Hamilton, D., Hansen, O., Higinbotham, D. W., Holmstrom, T., Huang, M., Ibrahim, H. F., Iodice, M., Jiang, X., Jin, G., Jones, M. K., Kelleher, A., Kim, W., Kolarkar, A., Korsch, W., LeRose, J. J., Li, X., Li, Y., Lindgren, R., Liyanage, N., Long, E., Lu, H. -J., Margaziotis, D. J., Markowitz, P., Marrone, S., McNulty, D., Meziani, Z. -E., Michaels, R., Moffit, B., Muñoz Camacho, C., Nanda, S., Narayan, A., Nelyubin, V., Norum, B., Oh, Y., Osipenko, M., Parno, D., Peng, J. C., Phillips, S. K., Posik, M., Puckett, A. J.  R., Qiang, Y., Rakhman, A., Ransome, R. D., Riordan, S., Saha, A., Sawatzky, B., Schulte, E., Shahinyan, A., Shabestari, M. H., Širca, S., Stepanyan, S., Subedi, R., Sulkosky, V., Tang, L. -G., Tobias, W. A., Urciuoli, G. M., Vilardi, I., Wang, K., Wojtsekhowski, B., Yan, X., Yao, H., Ye, Y., Ye, Z., Yuan, L., Zhan, X., Zhang, Y. -W., Zhao, B., Zheng, X., Zhu, L., Zhu, X., and Zong, X. Tue .  
"Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized He3 target".  United States.  https://doi.org/10.1103/PhysRevC.90.055209.  https://www.osti.gov/servlets/purl/1599860.

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@article{osti_1599860,

  title        = {Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized He3 target},

  author       = {Zhang, Y. and Qian, X. and Allada, K. and Dutta, C. and Huang, J. and Katich, J. and Wang, Y. and Aniol, K. and Annand, J. R.  M. and Averett, T. and Benmokhtar, F. and Bertozzi, W. and Bradshaw, P. C. and Bosted, P. and Camsonne, A. and Canan, M. and Cates, G. D. and Chen, C. and Chen, J. -P. and Chen, W. and Chirapatpimol, K. and Chudakov, E. and Cisbani, E. and Cornejo, J. C. and Cusanno, F. and Dalton, M. M. and Deconinck, W. and de Jager, C. W. and De Leo, R. and Deng, X. and Deur, A. and Ding, H. and Dolph, P. A.  M. and Dutta, D. and El Fassi, L. and Frullani, S. and Gao, H. and Garibaldi, F. and Gaskell, D. and Gilad, S. and Gilman, R. and Glamazdin, O. and Golge, S. and Guo, L. and Hamilton, D. and Hansen, O. and Higinbotham, D. W. and Holmstrom, T. and Huang, M. and Ibrahim, H. F. and Iodice, M. and Jiang, X. and Jin, G. and Jones, M. K. and Kelleher, A. and Kim, W. and Kolarkar, A. and Korsch, W. and LeRose, J. J. and Li, X. and Li, Y. and Lindgren, R. and Liyanage, N. and Long, E. and Lu, H. -J. and Margaziotis, D. J. and Markowitz, P. and Marrone, S. and McNulty, D. and Meziani, Z. -E. and Michaels, R. and Moffit, B. and Muñoz Camacho, C. and Nanda, S. and Narayan, A. and Nelyubin, V. and Norum, B. and Oh, Y. and Osipenko, M. and Parno, D. and Peng, J. C. and Phillips, S. K. and Posik, M. and Puckett, A. J.  R. and Qiang, Y. and Rakhman, A. and Ransome, R. D. and Riordan, S. and Saha, A. and Sawatzky, B. and Schulte, E. and Shahinyan, A. and Shabestari, M. H. and Širca, S. and Stepanyan, S. and Subedi, R. and Sulkosky, V. and Tang, L. -G. and Tobias, W. A. and Urciuoli, G. M. and Vilardi, I. and Wang, K. and Wojtsekhowski, B. and Yan, X. and Yao, H. and Ye, Y. and Ye, Z. and Yuan, L. and Zhan, X. and Zhang, Y. -W. and Zhao, B. and Zheng, X. and Zhu, L. and Zhu, X. and Zong, X.},

  abstractNote = {An experiment to measure single-spin asymmetries in semi-inclusive production of charged pions in deep-inelastic scattering on a transversely polarized 3He target was performed at Jefferson Lab in the kinematic region of 0.16<0.35 and 1.4 < Q2 < 2.7 GeV2. The pretzelosity asymmetries on 3He, which can be expressed as the convolution of the $h^⊥_{1T}$ transverse momentum dependent distribution functions and the Collins fragmentation functions in the leading order, were measured for the first time. Using the effective polarization approximation, we extracted the corresponding neutron asymmetries from the measured 3He asymmetries and cross-section ratios between the proton and 3He. Our results show that for both π± on 3He and on the neutron the pretzelosity asymmetries are consistent with zero within experimental uncertainties.},

  doi          = {10.1103/PhysRevC.90.055209},

  journal      = {Physical Review C, Nuclear Physics},

  number       = 5,

  volume       = 90,

  place        = {United States},

  year         = {Tue Nov 11 00:00:00 EST 2014},

  month        = {Tue Nov 11 00:00:00 EST 2014}

}

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Beam-Target Double-Spin Asymmetry $A_{LT}$ in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized ${}^{3}{He}$ Target at $1.4 < Q^{2} < 2.7 {GeV}^{2}$

Journal Article Huang, J. ; Allada, K. ; Dutta, C. ; ... - Physical Review Letters

We report the first measurement of the double-spin asymmetry A_LT for charged pion electroproduction in semi-inclusive deep inelastic electron scattering on a transversely polarized ³He target. The kinematics focused on the valence quark region, 0.16 < x < 0.35 with 1.4 < Q² < 2.7 GeV². The corresponding neutron A_LT asymmetries were extracted from the measured ³He asymmetries and proton/³He cross section ratios using the effective polarization approximation. These new data probe the transverse momentum dependent parton distribution function g_1T^q and therefore provide access to quark spin-orbit correlations. Our results indicate a positive azimuthal asymmetry for π^- production on ³Hemore »« less
Cited by 42
https://doi.org/10.1103/PhysRevLett.108.052001

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Single spin asymmetries in charged kaon production from semi-inclusive deep inelastic scattering on a transversely polarized ${}^{3}{He}$ target

Journal Article Zhao, Y. X. ; Wang, Y. ; Allada, K. ; ... - Physical Review C, Nuclear Physics

We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized 3He target. Both the Collins and Sivers moments, which are related to the nucleon transversity and Sivers distributions, respectively, are extracted over the kinematic range of 0.1 < x_bj<0.4 for K⁺ and K^– production. While the Collins and Sivers moments for K⁺ are consistent with zero within the experimental uncertainties, both moments for K^– favor negative values. The Sivers moments are compared to the theoretical prediction from a phenomenological fit to the world data. Whilemore »« less
Cited by 36
https://doi.org/10.1103/PhysRevC.90.055201

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Measurement of the Target-Normal Single-Spin Asymmetry in Deep-Inelastic Scattering from the Reaction ${}^{3}{He}^{↑} (e, e^{'}) X$

Journal Article Katich, J. ; Qian, X. ; Zhao, Y. X. ; ... - Physical Review Letters

We report the first measurement of the target single-spin asymmetry in deep-inelastic scattering from the inclusive reaction ³He^↑(e,e')X on a ³He gas target polarized normal to the lepton plane. Assuming time-reversal invariance, this asymmetry is strictly zero in the Born approximation. The experiment, conducted at Jefferson Lab using a 5.89 GeV electron beam, covers a range of 1.7<2.9 GeV, 1.0²<4.0 GeV² and 0.16<0.65. Neutron asymmetries were extracted using the effective nucleon polarization and measured proton-to-³He cross section ratios. The measured neutron asymmetries are negative with an average value of (-1.04+/-0.38)×10^-2 for invariant mass W>2 GeV, which is non-zero at themore »« less
https://doi.org/10.1103/PhysRevLett.113.022502

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Double spin asymmetries of inclusive hadron electroproduction from a transversely polarized ${}^{3}{He}$ target

Journal Article Zhao, Y. X. ; Allada, K. ; Aniol, K. ; ... - Physical Review C, Nuclear Physics

Here, we report the measurement of beam-target double-spin asymmetries A_LT in the inclusive production of identified hadrons, e +³He^↑ → h + X, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized ³He target. Hadrons (π^±, K^± and proton) were detected at 16° with an average momentummore »« less
Cited by 11
https://doi.org/10.1103/PhysRevC.92.015207

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Title: Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized He 3 target

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Citation Formats

Fragmentation of transversely polarized quarks probed in transverse momentum distributions journal, May 1993

Event structure and double helicity asymmetry in jet production from polarized p + p collisions at s = 200 GeV journal, July 2011

Densities, parton distributions, and measuring the nonspherical shape of the nucleon journal, December 2007

General partonic structure for hadronic spin asymmetries journal, January 2006

Beam-Target Double-Spin Asymmetry A LT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized He 3 Target at 1.4 < Q 2 < 2.7 GeV 2 journal, January 2012

Generalized parton distributions in the valence region from deeply virtual compton scattering journal, May 2013

Spin structure of the nucleon—status and recent results journal, July 2009

h 1 T ⊥ and quark orbital angular momentum journal, March 2009

Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region journal, December 2004

Single-Spin Asymmetries in Semi-Inclusive Deep-Inelastic Scattering on a Transversely Polarized Hydrogen Target journal, January 2005

Measurement of the Collins and Sivers asymmetries on transversely polarised protons journal, September 2010

The pretzelosity TMD and quark orbital angular momentum journal, April 2012

Spin-exchange optical pumping of noble-gas nuclei journal, April 1997

The spin structure of the nucleon journal, April 2013

Azimuthal spin asymmetries in light-cone constituent quark models journal, May 2009

Transverse momentum dependent distribution function h 1 T ⊥ and the single spin asymmetry A U T sin ﻿ ( 3 ϕ − 3 S ) journal, December 2008

Transverse momentum dependent parton distributions in a light-cone quark model journal, August 2008

Basic instrumentation for Hall A at Jefferson Lab journal, April 2004

Transverse spin structure of the nucleon through target single-spin asymmetry in semi-inclusive deep-inelastic (e, e’ $ \pi^{\pm}_{}$ ) reaction at Jefferson Lab journal, January 2011

Comparative study of nuclear effects in polarized electron scattering from 3 He journal, November 2013

Density measurement through elastic electron scattering with a gaseous target at the Jefferson Lab journal, July 2012

Shapes of the proton journal, August 2003

Collins Function and the Single Transverse Spin Asymmetry journal, July 2009

Collins and Sivers asymmetries for pions and kaons in muon–deuteron DIS journal, March 2009

Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in p + p collisions at s = 62.4 GeV journal, November 2012

QCD spin physics: Partonic spin structure of the nucleon journal, April 2012

General helicity formalism for semi-inclusive deep inelastic scattering journal, June 2011

Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized He 3 Target at Q 2 = 1.4 – 2.7 GeV 2 journal, August 2011

Transverse momentum dependent distribution functions in the bag model journal, April 2010

Semi-inclusive deep inelastic scattering at small transverse momentum journal, February 2007

Quark orbital angular momentum in a light-cone representation journal, October 1998

A measurement of the spin asymmetry and determination of the structure function g1 in deep inelastic muon-proton scattering journal, May 1988

Transverse-spin and transverse-momentum effects in high-energy processes journal, October 2010

Single-spin asymmetries: The Trento conventions journal, December 2004

The spin structure of the nucleon journal, January 2005

Optically polarized He 3 journal, December 2017

Where do we stand with a 3-D picture of the proton? journal, June 2016

The spin structure of the nucleon journal, June 2019

The spin structure of the nucleon journal, January 1994

The Spin Structure of the Nucleon: Proceeding of International School of Nucleon Structure: 1st Course conference, April 2017

Title: Measurement of “pretzelosity” asymmetry of charged pion production in semi-inclusive deep inelastic scattering on a polarized ${}^{3}{He}$ target

Fragmentation of transversely polarized quarks probed in transverse momentum distributions
journal, May 1993

Event structure and double helicity asymmetry in jet production from polarized $p + p$ collisions at $\sqrt{s} = 200 GeV$
journal, July 2011

Densities, parton distributions, and measuring the nonspherical shape of the nucleon
journal, December 2007

General partonic structure for hadronic spin asymmetries
journal, January 2006

Beam-Target Double-Spin Asymmetry $A_{LT}$ in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized ${}^{3}{He}$ Target at $1.4 < Q^{2} < 2.7 {GeV}^{2}$
journal, January 2012

Generalized parton distributions in the valence region from deeply virtual compton scattering
journal, May 2013

Spin structure of the nucleon—status and recent results
journal, July 2009

$h_{1 T}^{⊥}$ and quark orbital angular momentum
journal, March 2009

Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region
journal, December 2004

Single-Spin Asymmetries in Semi-Inclusive Deep-Inelastic Scattering on a Transversely Polarized Hydrogen Target
journal, January 2005

Measurement of the Collins and Sivers asymmetries on transversely polarised protons
journal, September 2010

The pretzelosity TMD and quark orbital angular momentum
journal, April 2012

Spin-exchange optical pumping of noble-gas nuclei
journal, April 1997

The spin structure of the nucleon
journal, April 2013

Azimuthal spin asymmetries in light-cone constituent quark models
journal, May 2009

Transverse momentum dependent distribution function $h_{1 T}^{⊥}$ and the single spin asymmetry $A_{U T}^{\sin (3 ϕ - 3 S)}$
journal, December 2008

Transverse momentum dependent parton distributions in a light-cone quark model
journal, August 2008

Basic instrumentation for Hall A at Jefferson Lab
journal, April 2004

Transverse spin structure of the nucleon through target single-spin asymmetry in semi-inclusive deep-inelastic (e, e’ $ \pi^{\pm}_{}$ ) reaction at Jefferson Lab
journal, January 2011

Comparative study of nuclear effects in polarized electron scattering from $^{3}$ He
journal, November 2013

Density measurement through elastic electron scattering with a gaseous target at the Jefferson Lab
journal, July 2012

Shapes of the proton
journal, August 2003

Collins Function and the Single Transverse Spin Asymmetry
journal, July 2009

Collins and Sivers asymmetries for pions and kaons in muon–deuteron DIS
journal, March 2009

Cross sections and double-helicity asymmetries of midrapidity inclusive charged hadrons in $p + p$ collisions at $\sqrt{s} = 62.4 GeV$
journal, November 2012

QCD spin physics: Partonic spin structure of the nucleon
journal, April 2012

General helicity formalism for semi-inclusive deep inelastic scattering
journal, June 2011

Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^{3}{He}$ Target at $Q^{2} = 1.4 - 2.7 {GeV}^{2}$
journal, August 2011

Transverse momentum dependent distribution functions in the bag model
journal, April 2010

Semi-inclusive deep inelastic scattering at small transverse momentum
journal, February 2007

Quark orbital angular momentum in a light-cone representation
journal, October 1998

A measurement of the spin asymmetry and determination of the structure function g1 in deep inelastic muon-proton scattering
journal, May 1988

Transverse-spin and transverse-momentum effects in high-energy processes
journal, October 2010

Single-spin asymmetries: The Trento conventions
journal, December 2004

The spin structure of the nucleon
journal, January 2005

Optically polarized ${}^{3}{He}$
journal, December 2017

Where do we stand with a 3-D picture of the proton?
journal, June 2016

The spin structure of the nucleon
journal, June 2019

The spin structure of the nucleon
journal, January 1994

The Spin Structure of the Nucleon: Proceeding of International School of Nucleon Structure: 1st Course
conference, April 2017