Boer-Mulders effect in unpolarized SIDIS: An analysis of the COMPASS and HERMES data on the $\cos 2 \phi$ asymmetry

Melis, Stefano; Prokudin, Alexei

doi:10.1103/PhysRevD.81.114026

Boer-Mulders effect in unpolarized SIDIS: An analysis of the COMPASS and HERMES data on the $$\cos 2 \phi$$ asymmetry

Journal Article · Thu Jun 17 00:00:00 EDT 2010 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.81.114026· OSTI ID:982198

Melis, Stefano ^[1]; Prokudin, Alexei ^[2]

Univ. del Piemonte Orientale "A. Avogadro", and INFN, Gruppo Collegato di Alessandria, Alessandria (Italy)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

We present a phenomenological analysis of the $$\cos 2 \phi$$ asymmetry recently measured by the COMPASS and HERMES collaborations in unpolarized semi-inclusive deep inelastic scattering. In the kinematical regimes explored by these experiments the asymmetry arises from transverse-spin and intrinsic transverse-momentum effects. We consider the leading-twist contribution, related to the so-called Boer-Mulders transverse-polarization distribution $$h_1^{\perp}(x, k_T^2)$$, and the twist-4 Cahn contribution, involving unpolarized transverse-momentum distribution functions. We show that a reasonably good fit of the data is achieved with a Boer-Mulders function consistent with the main theoretical expectations. Lastly, our conclusion is that the COMPASS and HERMES measurements represent the first experimental evidence of the Boer-Mulders effect in SIDIS.

View Accepted Manuscript (DOE)

Research Organization:: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 982198

Alternate ID(s):: OSTI ID: 21407971

Report Number(s):: DOE/OR/23177--1071; JLAB-THY--09-1121

Journal Information:: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Journal Name: Physical Review. D, Particles, Fields, Gravitation and Cosmology Journal Issue: 11 Vol. 81; ISSN PRVDAQ; ISSN 1550-7998

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (73)

Measurement of hadron azimuthal distributions in deep inelastic muon proton scattering Arneodo, M.; Arvidson, A.; Aubert, J. J. Zeitschrift f�r Physik C Particles and Fields, Vol. 34, Issue 3 https://doi.org/10.1007/BF01548808	journal	September 1987
A realistic calculation of the azimuthal asymmetry in semi-inclusive deep inelastic scattering König, A.; Kroll, P. Zeitschrift für Physik C Particles and Fields, Vol. 16, Issue 1 https://doi.org/10.1007/BF01573752	journal	March 1982
Dynamical parton distributions revisited Glück, M.; Reya, E.; Vogt, A. The European Physical Journal C, Vol. 5, Issue 3 https://doi.org/10.1007/s100520050289	journal	January 1998
Investigations of azimuthal asymmetry in semi-inclusive leptoproduction Oganessyan, K. A.; Avakian, H. R.; Bianchi, N. The European Physical Journal C, Vol. 5, Issue 4 https://doi.org/10.1007/s100520050309	journal	January 1998
Investigations of azimuthal asymmetry in semi-inclusive leptoproduction Oganessyan, K. A.; Avakian, H. R.; Bianchi, N. The European Physical Journal C, Vol. 5, Issue 4 https://doi.org/10.1007/s100529800873	journal	October 1998
Dynamical parton distributions revisited Glück, M.; Reya, E.; Vogt, A. The European Physical Journal C, Vol. 5, Issue 3 https://doi.org/10.1007/s100529800978	journal	September 1998
Azimuthal dependence in leptoproduction: A simple parton model calculation N. Cahn, Robert Physics Letters B, Vol. 78, Issue 2-3 https://doi.org/10.1016/0370-2693(78)90020-5	journal	September 1978
Azimuthal asymmetry in lepton-proton scattering at high energies Chay, Junegone; Ellis, Stephen D.; Stirling, W. James Physics Letters B, Vol. 269, Issue 1-2 https://doi.org/10.1016/0370-2693(91)91471-7	journal	October 1991
QCD predictions for semi-inclusive and inclusive leptoproduction Méndez, A. Nuclear Physics B, Vol. 145, Issue 1 https://doi.org/10.1016/0550-3213(78)90422-4	journal	November 1978
Fragmentation of transversely polarized quarks probed in transverse momentum distributions Collins, John Nuclear Physics B, Vol. 396, Issue 1 https://doi.org/10.1016/0550-3213(93)90262-N	journal	May 1993
Transverse polarisation of quarks in hadrons Barone, Vincenzo; Drago, Alessandro; Ratcliffe, Philip G. Physics Reports, Vol. 359, Issue 1-2 https://doi.org/10.1016/S0370-1573(01)00051-5	journal	March 2002
Measurement of azimuthal asymmetries in deep inelastic scattering Breitweg, J.; Chekanov, S.; Derrick, M. Physics Letters B, Vol. 481, Issue 2-4 https://doi.org/10.1016/S0370-2693(00)00430-5	journal	May 2000
Update on transversity and Collins functions from SIDIS and data Anselmino, M.; Boglione, M.; D'Alesio, U. Nuclear Physics B - Proceedings Supplements, Vol. 191 https://doi.org/10.1016/j.nuclphysbps.2009.03.117	journal	June 2009
QCD factorization for spin-dependent cross sections in DIS and Drell–Yan processes at low transverse momentum Ji, Xiangdong; Ma, Jian-Ping; Yuan, Feng Physics Letters B, Vol. 597, Issue 3-4 https://doi.org/10.1016/j.physletb.2004.07.026	journal	September 2004
On the cos2ϕ asymmetry in unpolarized leptoproduction Barone, Vincenzo; Lu, Zhun; Ma, Bo-Qiang Physics Letters B, Vol. 632, Issue 2-3 https://doi.org/10.1016/j.physletb.2005.10.016	journal	January 2006
“T-odd effects” in unpolarized Drell–Yan scattering Gamberg, Leonard P.; Goldstein, Gary R. Physics Letters B, Vol. 650, Issue 5-6 https://doi.org/10.1016/j.physletb.2007.05.043	journal	July 2007
Are all Boer–Mulders functions alike? Burkardt, Matthias; Hannafious, Brian Physics Letters B, Vol. 658, Issue 4 https://doi.org/10.1016/j.physletb.2007.09.064	journal	January 2008
Transverse momentum dependence of semi-inclusive pion production Mkrtchyan, H.; Bosted, P. E.; Adams, G. S. Physics Letters B, Vol. 665, Issue 1 https://doi.org/10.1016/j.physletb.2008.05.047	journal	July 2008
Azimuthal and single spin asymmetries in hard scattering processes D’Alesio, U.; Murgia, F. Progress in Particle and Nuclear Physics, Vol. 61, Issue 2 https://doi.org/10.1016/j.ppnp.2008.01.001	journal	October 2008
Measurement of azimuthal asymmetries of the unpolarized cross section at HERMES Giordano, Francesca; Lamb, Rebecca; Crabb, Donald G. SPIN PHYSICS: 18th International Spin Physics Symposium, AIP Conference Proceedings https://doi.org/10.1063/1.3215681	conference	January 2009
Semi-inclusive deep inelastic scattering at small transverse momentum Bacchetta, Alessandro; Diehl, Markus; Goeke, Klaus Journal of High Energy Physics, Vol. 2007, Issue 02 https://doi.org/10.1088/1126-6708/2007/02/093	journal	February 2007
Critique of parton-model calculations of azimuthal dependence in leptoproduction Cahn, Robert N. Physical Review D, Vol. 40, Issue 9 https://doi.org/10.1103/PhysRevD.40.3107	journal	November 1989
Single-spin production asymmetries from the hard scattering of pointlike constituents Sivers, Dennis Physical Review D, Vol. 41, Issue 1 https://doi.org/10.1103/PhysRevD.41.83	journal	January 1990
Hard-scattering scaling laws for single-spin production asymmetries Sivers, Dennis Physical Review D, Vol. 43, Issue 1 https://doi.org/10.1103/PhysRevD.43.261	journal	January 1991
Azimuthal asymmetry in lepton-proton scattering at high energies Chay, Junegone; Ellis, Stephen D.; Stirling, W. James Physical Review D, Vol. 45, Issue 1 https://doi.org/10.1103/PhysRevD.45.46	journal	January 1992
Time-reversal odd distribution functions in leptoproduction Boer, D.; Mulders, P. J. Physical Review D, Vol. 57, Issue 9 https://doi.org/10.1103/PhysRevD.57.5780	journal	May 1998
Initial-state interactions in the unpolarized Drell-Yan process Boer, Daniël; Brodsky, Stanley J.; Hwang, Dae Sung Physical Review D, Vol. 67, Issue 5 https://doi.org/10.1103/PhysRevD.67.054003	journal	March 2003
Novel transversity properties in semi-inclusive deep inelastic scattering Gamberg, Leonard P.; Goldstein, Gary R.; Oganessyan, Karo A. Physical Review D, Vol. 67, Issue 7 https://doi.org/10.1103/PhysRevD.67.071504	journal	April 2003
Single-spin asymmetries: The Trento conventions Bacchetta, Alessandro; D’Alesio, Umberto; Diehl, Markus Physical Review D, Vol. 70, Issue 11 https://doi.org/10.1103/PhysRevD.70.117504	journal	December 2004
Role of Cahn and Sivers effects in deep inelastic scattering Anselmino, M.; Boglione, M.; D’Alesio, U. Physical Review D, Vol. 71, Issue 7 https://doi.org/10.1103/PhysRevD.71.074006	journal	April 2005
Monte Carlo simulation of events with Drell-Yan lepton pairs from antiproton-proton collisions Bianconi, A.; Radici, Marco Physical Review D, Vol. 71, Issue 7 https://doi.org/10.1103/PhysRevD.71.074014	journal	April 2005
Transverse deformation of parton distributions and transversity decomposition of angular momentum Burkardt, Matthias Physical Review D, Vol. 72, Issue 9 https://doi.org/10.1103/PhysRevD.72.094020	journal	November 2005
Drell-Yan lepton angular distribution at small transverse momentum Boer, Daniël; Vogelsang, Werner Physical Review D, Vol. 74, Issue 1 https://doi.org/10.1103/PhysRevD.74.014004	journal	July 2006
Transversity and Collins functions from SIDIS and e + e − data Anselmino, M.; Boglione, M.; D’Alesio, U. Physical Review D, Vol. 75, Issue 5 https://doi.org/10.1103/PhysRevD.75.054032	journal	March 2007
Global analysis of fragmentation functions for pions and kaons and their uncertainties de Florian, Daniel; Sassot, Rodolfo; Stratmann, Marco Physical Review D, Vol. 75, Issue 11 https://doi.org/10.1103/PhysRevD.75.114010	journal	June 2007
Transverse momentum dependence of the angular distribution of the Drell-Yan process Berger, Edmond L.; Qiu, Jian-Wei; Rodriguez-Pedraza, Ricardo A. Physical Review D, Vol. 76, Issue 7 https://doi.org/10.1103/PhysRevD.76.074006	journal	October 2007
Extracting Boer-Mulders functions from p + D Drell-Yan processes Zhang, Bing; Lu, Zhun; Ma, Bo-Qiang Physical Review D, Vol. 77, Issue 5 https://doi.org/10.1103/PhysRevD.77.054011	journal	March 2008
Transverse quark spin effects and the flavor dependence of the Boer-Mulders function Gamberg, Leonard P.; Goldstein, Gary R.; Schlegel, Marc Physical Review D, Vol. 77, Issue 9 https://doi.org/10.1103/PhysRevD.77.094016	journal	May 2008
Transverse momentum dependent parton distributions in a light-cone quark model Pasquini, B.; Cazzaniga, S.; Boffi, S. Physical Review D, Vol. 78, Issue 3 https://doi.org/10.1103/PhysRevD.78.034025	journal	August 2008
cos 2 ϕ asymmetries in unpolarized semi-inclusive DIS Zhang, Bing; Lu, Zhun; Ma, Bo-Qiang Physical Review D, Vol. 78, Issue 3 https://doi.org/10.1103/PhysRevD.78.034035	journal	August 2008
Systematic phenomenological study of the cos 2 ϕ asymmetry in unpolarized semi-inclusive DIS Barone, Vincenzo; Prokudin, Alexei; Ma, Bo-Qiang Physical Review D, Vol. 78, Issue 4 https://doi.org/10.1103/PhysRevD.78.045022	journal	August 2008
Transverse-momentum distributions in a diquark spectator model Bacchetta, Alessandro; Conti, Francesco; Radici, Marco Physical Review D, Vol. 78, Issue 7 https://doi.org/10.1103/PhysRevD.78.074010	journal	October 2008
Measurement of semi-inclusive π + electroproduction off the proton Osipenko, M.; Ripani, M.; Ricco, G. Physical Review D, Vol. 80, Issue 3 https://doi.org/10.1103/PhysRevD.80.032004	journal	August 2009
Analyzing the Boer-Mulders function within different quark models Courtoy, A.; Scopetta, S.; Vento, V. Physical Review D, Vol. 80, Issue 7 https://doi.org/10.1103/PhysRevD.80.074032	journal	October 2009
Measurement of Angular Distributions of Drell-Yan Dimuons in p + p Interactions at 800 GeV / c Zhu, L. Y.; Peng, J. C.; Reimer, P. E. Physical Review Letters, Vol. 102, Issue 18 https://doi.org/10.1103/PhysRevLett.102.182001	journal	May 2009
Clean Tests of Quantum Chromodynamics in μ p Scattering Georgi, Howard; Politzer, H. David Physical Review Letters, Vol. 40, Issue 1 https://doi.org/10.1103/PhysRevLett.40.3	journal	January 1978
Transverse Spin Structure of the Nucleon from Lattice-QCD Simulations Göckeler, M.; Hägler, Ph.; Horsley, R. Physical Review Letters, Vol. 98, Issue 22 https://doi.org/10.1103/PhysRevLett.98.222001	journal	May 2007
Measurement of Angular Distributions of Drell-Yan Dimuons in p + d Interactions at 800 GeV / c Zhu, L. Y.; Peng, J. C.; Reimer, P. E. Physical Review Letters, Vol. 99, Issue 8 https://doi.org/10.1103/PhysRevLett.99.082301	journal	August 2007
Sivers effect for pion and kaon production in semi-inclusive deep inelastic scattering Anselmino, M.; Boglione, M.; D’Alesio, U. The European Physical Journal A, Vol. 39, Issue 1 https://doi.org/10.1140/epja/i2008-10697-y	journal	December 2008
The cos2φ asymmetry of Drell–Yan and J/ψ production in unpolarized pp̄ scattering Barone, V.; Lu, Zhun; Ma, Bo-Qiang The European Physical Journal C, Vol. 49, Issue 4 https://doi.org/10.1140/epjc/s10052-006-0174-6	journal	December 2006
Transversity and its accompanying T-odd distribution from Drell–Yan processes with pion-proton collisions Sissakian, A.; Shevchenko, O.; Nagaytsev, A. The European Physical Journal C, Vol. 46, Issue 1 https://doi.org/10.1140/epjc/s2006-02490-1	journal	March 2006
Physics with Hadronic Probes at Compass Ketzer, Bernard International Journal of Modern Physics A, Vol. 24, Issue 02n03 https://doi.org/10.1142/S0217751X09043547	journal	January 2009
Study of the Fundamental Structure of Matter with an Electron-Ion Collider Deshpande, Abhay; Milner, Richard; Venugopalan, Raju Annual Review of Nuclear and Particle Science, Vol. 55, Issue 1 https://doi.org/10.1146/annurev.nucl.54.070103.181218	journal	December 2005
Measurement of Azimuthal Asymmetries of the Unpolarized Cross-Section at HERMES Giordano, F.; Lamb, R. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/phppubdb-10036	text	January 2009
Single-spin asymmetries: The Trento conventions Bacchetta, Alessandro; D'Alesio, Umberto; Diehl, Markus Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2017-04959	text	January 2004
Are all Boer-Mulders functions alike? Burkardt, Matthias; Hannafious, Brian arXiv https://doi.org/10.48550/arxiv.0705.1573	text	January 2007
Transverse Quark Spin Effects and the Flavor Dependence of the Boer-Mulders Function Gamberg, Leonard P.; Goldstein, Gary R.; Schlegel, Marc arXiv https://doi.org/10.48550/arxiv.0708.0324	text	January 2007
Transverse momentum dependence of the angular distribution of the Drell-Yan process Berger, Edmond L.; Qiu, Jian-Wei; Rodriguez-Pedraza, Ricardo A. arXiv https://doi.org/10.48550/arxiv.0708.0578	text	January 2007
Extracting Boer-Mulders functions from $p+D$ Drell-Yan processes Zhang, Bing; Lu, Zhun; Ma, Bo-Qiang arXiv https://doi.org/10.48550/arxiv.0803.1692	text	January 2008
Transverse-momentum distributions in a diquark spectator model Bacchetta, A.; Conti, F.; Radici, M. arXiv https://doi.org/10.48550/arxiv.0807.0323	text	January 2008
Measurement of azimuthal asymmetries of the unpolarized cross section at HERMES Giordano, Francesca; Lamb, Rebecca arXiv https://doi.org/10.48550/arxiv.0901.2438	text	January 2009
Measurement of Azimuthal Asymmetries in Deep Inelastic Scattering Collaboration, Zeus arXiv https://doi.org/10.48550/arxiv.hep-ex/0003017	text	January 2000
Single-spin asymmetries: the Trento conventions Bacchetta, Alessandro; D'Alesio, Umberto; Diehl, Markus arXiv https://doi.org/10.48550/arxiv.hep-ph/0410050	text	January 2004
Monte-Carlo simulation of events with Drell-Yan lepton pairs from antiproton-proton collisions Bianconi, A.; Radici, M. arXiv https://doi.org/10.48550/arxiv.hep-ph/0412368	text	January 2004
The role of Cahn and Sivers effects in Deep Inelastic Scattering Anselmino, M.; Boglione, M.; D'Alesio, U. arXiv https://doi.org/10.48550/arxiv.hep-ph/0501196	text	January 2005
Transverse Deformation of Parton Distributions and Transversity Decomposition of Angular Momentum Burkardt, Matthias arXiv https://doi.org/10.48550/arxiv.hep-ph/0505189	text	January 2005
$T$-Odd Effects in Unpolarized Drell-Yan Scattering Gamberg, Leonard P.; Goldstein, Gary R. arXiv https://doi.org/10.48550/arxiv.hep-ph/0506127	text	January 2005
On the cos 2 phi asymmetry in unpolarized leptoproduction Barone, Vincenzo; Lu, Zhun; Ma, Bo-Qiang arXiv https://doi.org/10.48550/arxiv.hep-ph/0512145	text	January 2005
Drell-Yan Lepton Angular Distribution at Small Transverse Momentum Boer, Daniel; Vogelsang, Werner arXiv https://doi.org/10.48550/arxiv.hep-ph/0604177	text	January 2006
The cos 2 phi asymmetry of Drell-Yan and J/psi production in unpolarized ppbar scattering Barone, Vincenzo; Lu, Zhun; Ma, Bo-Qiang arXiv https://doi.org/10.48550/arxiv.hep-ph/0612350	text	January 2006
Transversity and Collins functions from SIDIS and e+e- data Anselmino, M.; Boglione, M.; D'Alesio, U. arXiv https://doi.org/10.48550/arxiv.hep-ph/0701006	text	January 2007
Time-reversal odd distribution functions in leptoproduction Boer, D.; Mulders, P. J. arXiv https://doi.org/10.48550/arxiv.hep-ph/9711485	text	January 1997
Dynamical Parton Distributions Revisited Gl"uck, M.; Reya, E.; Vogt, A. arXiv https://doi.org/10.48550/arxiv.hep-ph/9806404	text	January 1998

Cited By (20)

The spin structure of the nucleon Kabuss, Eva-Maria Czechoslovak Journal of Physics, Vol. 55, Issue S1 https://doi.org/10.1007/bf03031986	journal	January 2005
Azimuthal Spin Asymmetries in SIDIS Chakrabarti, D.; Maji, T.; Mukherjee, A. Few-Body Systems, Vol. 59, Issue 2 https://doi.org/10.1007/s00601-018-1335-5	journal	February 2018
Spin physics through unpolarized processes Lu, Zhun Frontiers of Physics, Vol. 11, Issue 1 https://doi.org/10.1007/s11467-015-0525-6	journal	January 2016
The spin structure of the nucleon Bass, S. D.; Thomas, A. W. Progress in Particle and Nuclear Physics, Vol. 33 https://doi.org/10.1016/0146-6410(94)90048-5	journal	January 1994
Azimuthal asymmetries for hadron distributions inside a jet in hadronic collisions D'Alesio, Umberto; Murgia, Francesco; Pisano, Cristian Journal of Physics: Conference Series, Vol. 295 https://doi.org/10.1088/1742-6596/295/1/012064	journal	May 2011
Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks Barone, Vincenzo; Melis, Stefano; Prokudin, Alexei Physical Review D, Vol. 82, Issue 11 https://doi.org/10.1103/physrevd.82.114025	journal	December 2010
Azimuthal asymmetries for hadron distributions inside a jet in hadronic collisions D’Alesio, Umberto; Murgia, Francesco; Pisano, Cristian Physical Review D, Vol. 83, Issue 3 https://doi.org/10.1103/physrevd.83.034021	journal	February 2011
Sivers and Boer-Mulders observables from lattice QCD Musch, B. U.; Hägler, Ph.; Engelhardt, M. Physical Review D, Vol. 85, Issue 9 https://doi.org/10.1103/physrevd.85.094510	journal	May 2012
Transverse single-spin asymmetries in p ↑ p → γ X from quark-gluon-quark correlations in the proton Kanazawa, K.; Koike, Y.; Metz, A. Physical Review D, Vol. 91, Issue 1 https://doi.org/10.1103/physrevd.91.014013	journal	January 2015
Probing transverse momentum dependent parton distributions in charmonium and bottomonium production Mukherjee, Asmita; Rajesh, Sangem Physical Review D, Vol. 93, Issue 5 https://doi.org/10.1103/physrevd.93.054018	journal	March 2016
Boer-Mulders function of the pion and the q T -weighted cos 2 φ asymmetry in the unpolarized π − p Drell-Yan process at COMPASS Wang, Zhengxian; Wang, Xiaoyu; Lu, Zhun Physical Review D, Vol. 95, Issue 9 https://doi.org/10.1103/physrevd.95.094004	journal	May 2017
Nucleon transverse momentum-dependent parton distributions in lattice QCD: Renormalization patterns and discretization effects Yoon, Boram; Engelhardt, Michael; Gupta, Rajan Physical Review D, Vol. 96, Issue 9 https://doi.org/10.1103/physrevd.96.094508	journal	November 2017
Lepton angular distributions of fixed-target Drell-Yan experiments in perturbative QCD and a geometric approach Chang, Wen-Chen; McClellan, Randall Evan; Peng, Jen-Chieh Physical Review D, Vol. 99, Issue 1 https://doi.org/10.1103/physrevd.99.014032	journal	January 2019
The spin structure of the nucleon Aidala, Christine A.; Bass, Steven D.; Hasch, Delia Reviews of Modern Physics, Vol. 85, Issue 2 https://doi.org/10.1103/revmodphys.85.655	journal	April 2013
$$J/\psi $$ J / ψ production in polarized and unpolarized ep collision and Sivers and $$\cos 2\phi $$ cos 2 ϕ asymmetries Mukherjee, Asmita; Rajesh, Sangem The European Physical Journal C, Vol. 77, Issue 12 https://doi.org/10.1140/epjc/s10052-017-5406-4	journal	December 2017
The Spin Structure of the Nucleon Mallot, Gerhard K. Proceedings of the XIX International Symposium, Lepton and Photon Interactions at High Energies https://doi.org/10.1142/9789812793942_0028	conference	November 2011
π - N Drell-Yan Process in TMD Factorization Wang, Xiaoyu; Lu, Zhun Advances in High Energy Physics, Vol. 2019 https://doi.org/10.1155/2019/6734293	journal	January 2019
Azimuthal asymmetries for hadron distributions inside a jet in hadronic collisions D'Alesio, Umberto; Pisano, Cristian; Murgia, Francesco arXiv https://doi.org/10.48550/arxiv.1011.2692	text	January 2010
The Spin Structure of the Nucleon Aidala, Christine A.; Bass, Steven D.; Hasch, Delia arXiv https://doi.org/10.48550/arxiv.1209.2803	text	January 2012
Nucleon transverse momentum-dependent parton distributions in lattice QCD: Renormalization patterns and discretization effects Yoon, Boram; Engelhardt, Michael; Gupta, Rajan Universität Regensburg https://doi.org/10.5283/epub.39558	text	January 2017

Similar Records

Boer-Mulders effect in unpolarized SIDIS: An analysis of the COMPASS and HERMES data on the cos2{phi} asymmetry

Journal Article · Tue Jun 01 00:00:00 EDT 2010 · Physical Review. D, Particles Fields · OSTI ID:21407971

Unpolarized Azimuthal Asymmetries from the COMPASS Experiment at CERN

Journal Article · Wed Dec 16 23:00:00 EST 2009 · AIP Conference Proceedings · OSTI ID:21325698

Azimuthal asymmetries in unpolarized Drell-Yan processes and the Boer-Mulders distributions of antiquarks

Journal Article · Tue Nov 30 23:00:00 EST 2010 · Physical Review D · OSTI ID:1003832

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ASYMMETRY
DEEP INELASTIC SCATTERING
DISTRIBUTION
DISTRIBUTION FUNCTIONS
TRANSVERSE MOMENTUM

Boer-Mulders effect in unpolarized SIDIS: An analysis of the COMPASS and HERMES data on the $$\cos 2 \phi$$ asymmetry

Citation Formats

References (73)

Cited By (20)

Similar Records

Related Subjects