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

Gao, H.; Gamberg, L.; Chen, J. -P.; Qian, X.; Qiang, Y.; Huang, M.; Afanasev, A.; Anselmino, M.; Avakian, H.; Cates, G.; Chudakov, E.; Cisbani, E.; de Jager, C.; Garibaldi, F.; Hu, B. T.; Jiang, X.; Kumar, K. S.; Li, X. M.; Lu, H. J.; Meziani, Z. -E.; Ma, B. -Q.; Mao, Y. J.; Peng, J. -C.; Prokudin, A.; Schlegel, M.; Souder, P.; Xiao, Z. G.; Ye, Y.; Zhu, L.

doi:10.1140/epjp/i2011-11002-4

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 Article · Wed Jan 12 00:00:00 EST 2011 · The European Physical Journal Plus

DOI:https://doi.org/10.1140/epjp/i2011-11002-4· OSTI ID:2589099

Gao, H. ^[1]; Gamberg, L. ^[2]; Chen, J. -P. ^[3]; Qian, X. ^[4]; Qiang, Y. ^[3]; Huang, M. ^[1]; Afanasev, A. ^[5]; Anselmino, M. ^[6]; Avakian, H. ^[3]; Cates, G. ^[7]; Chudakov, E. ^[3]; Cisbani, E. ^[8]; de Jager, C. ^[3]; Garibaldi, F. ^[8]; Hu, B. T. ^[9]; Jiang, X. ^[10]; Kumar, K. S. ^[11]; Li, X. M. ^[12]; Lu, H. J. ^[13]; Meziani, Z. -E. ^[14] more »

Duke University, Durham, NC (United States)
Penn State University-Berks, PA (United States)
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
California Institute of Technology (CalTech), Pasadena, CA (United States)
Hampton University, VA (United States)
Università di Torino and INFN (Italy)
University of Virginia, Charlottesville, VA (United States)
INFN, Sezione di Roma III (Italy)
Lanzhou University (China)
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
University of Massachusetts, Amherst, MA (United States)
China Institute of Atomic Energy, Beijing (China)
Huangshan University (China)
Temple University, Philadelphia, PA (United States)
Peking University, Beijing (China)
University of Illinois at Urbana-Champaign, IL (United States)
Universität Tübingen (Germany)
Syracuse University, NY (United States)
Tsinghua University, Beijing (China)
University of Science and Technology, Hefei (China)

Jefferson Lab (JLab) 12 GeV energy upgrade provides a golden opportunity to perform precision studies of the transverse spin and transverse-momentum-dependent structure in the valence quark region for both the proton and the neutron. In this paper, we focus our discussion on a recently approved experiment on the neutron as an example of the precision studies planned at JLab. The new experiment will perform precision measurements of target Single Spin Asymmetries (SSA) from semi-inclusive electro-production of charged pions from a 40-cm long transversely polarized ³He target in Deep-Inelastic-Scattering kinematics using 11 and 8.8 GeV electron beams. This new coincidence experiment in Hall A will employ a newly proposed solenoid spectrometer (SoLID). The large acceptance spectrometer and the high polarized luminosity will provide precise 4-D (x, z, P_T and Q²) data on the Collins, Sivers, and pretzelocity asymmetries for the neutron through the azimuthal angular dependence. The full 2ππ azimuthal angular coverage in the lab is essential in controlling the systematic uncertainties. The results from this experiment, when combined with the proton Collins asymmetry measurement and the Collins fragmentation function determined from the e⁺e⁻ collision data, will allow for a quark flavor separation in order to achieve a determination of the tensor charge of the d quark to a 10% accuracy. As a result, the extracted Sivers and pretzelocity asymmetries will provide important information to understand the correlations between the quark orbital angular momentum and the nucleon spin and between the quark spin and nucleon spin.

View Accepted Manuscript (DOE)

Research Organization:: Penn State University-Berks, Reading, PA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-84ER40150; FG02-03ER41231; FG02-07ER41460

OSTI ID:: 2589099

Alternate ID(s):: OSTI ID: 1015434

Journal Information:: The European Physical Journal Plus, Journal Name: The European Physical Journal Plus Journal Issue: 1 Vol. 126; ISSN 2190-5444

Publisher:: Springer Science and Business Media LLCCopyright Statement

Country of Publication:: United States

Language:: English

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