Beam-Target Double-Spin Asymmetry ALT in Charged Pion Production from Deep Inelastic Scattering on a Transversely Polarized 3He Target at 1.4 < Q2 < 2.7 GeV2

被引:49
作者
Huang, J. [1 ]
Allada, K. [2 ]
Dutta, C. [2 ]
Katich, J. [3 ]
Qian, X. [4 ,5 ]
Wang, Y. [6 ]
Zhang, Y. [7 ]
Aniol, K. [8 ]
Annand, J. R. M. [9 ]
Averett, T. [3 ]
Benmokhtar, F. [10 ]
Bertozzi, W. [1 ]
Bradshaw, P. C. [3 ]
Bosted, P. [11 ]
Camsonne, A. [11 ]
Canan, M. [12 ]
Cates, G. D. [13 ]
Chen, C. [14 ]
Chen, J. -P. [11 ]
Chen, W. [4 ]
Chirapatpimol, K. [13 ]
Chudakov, E. [11 ]
Cisbani, E. [15 ,16 ]
Cornejo, J. C. [8 ]
Cusanno, F. [15 ,16 ]
Dalton, M. M. [13 ]
Deconinck, W. [1 ]
de Jager, C. W. [11 ,13 ]
De Leo, R. [17 ,18 ]
Deng, X. [13 ]
Deur, A. [11 ]
Ding, H. [13 ]
Dolph, P. A. M. [13 ]
Dutta, D. [19 ]
El Fassi, L. [20 ]
Frullani, S. [15 ,16 ]
Gao, H. [4 ]
Garibaldi, F. [15 ,16 ]
Gaskell, D. [11 ]
Gilad, S. [1 ]
Gilman, R. [11 ,20 ]
Glamazdin, O. [21 ]
Golge, S. [12 ]
Guo, L. [22 ]
Hamilton, D. [9 ]
Hansen, O. [11 ]
Higinbotham, D. W. [11 ]
Holmstrom, T. [23 ]
Huang, M. [4 ]
Ibrahim, H. F. [24 ]
机构
[1] MIT, Cambridge, MA 02139 USA
[2] Univ Kentucky, Lexington, KY 40506 USA
[3] Coll William & Mary, Williamsburg, VA 23187 USA
[4] Duke Univ, Durham, NC 27708 USA
[5] CALTECH, Kellogg Radiat Lab, Pasadena, CA 91125 USA
[6] Univ Illinois, Urbana, IL 61801 USA
[7] Lanzhou Univ, Lanzhou 730000, Peoples R China
[8] Calif State Univ Los Angeles, Los Angeles, CA 90032 USA
[9] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland
[10] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[11] Thomas Jefferson Natl Accelerator Facil, Newport News, VA 23606 USA
[12] Old Dominion Univ, Norfolk, VA 23529 USA
[13] Univ Virginia, Charlottesville, VA 22904 USA
[14] Hampton Univ, Williamsburg, VA 23187 USA
[15] Ist Nazl Fis Nucl, Sez Roma, I-00161 Rome, Italy
[16] Ist Super Sanita, I-00161 Rome, Italy
[17] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy
[18] Univ Bari, I-70126 Bari, Italy
[19] Mississippi State Univ, Mississippi State, MS 39762 USA
[20] Rutgers State Univ, Piscataway, NJ 08855 USA
[21] Kharkov Inst Phys & Technol, UA-61108 Kharkov, Ukraine
[22] Los Alamos Natl Lab, Los Alamos, NM 87545 USA
[23] Longwood Univ, Farmville, VA 23909 USA
[24] Cairo Univ, Giza 12613, Egypt
[25] INFN, Sez Roma3, I-00146 Rome, Italy
[26] Kyungpook Natl Univ, Taegu 702701, South Korea
[27] China Inst Atom Energy, Beijing, Peoples R China
[28] Kent State Univ, Kent, OH 44242 USA
[29] Univ Sci & Technol China, Hefei 230026, Peoples R China
[30] Florida Int Univ, Miami, FL 33199 USA
[31] Univ Massachusetts, Amherst, MA 01003 USA
[32] Temple Univ, Philadelphia, PA 19122 USA
[33] Univ Blaise Pascal, IN2P3, F-63177 Clermont Ferrand, France
[34] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy
[35] Univ New Hampshire, Durham, NH 03824 USA
[36] Syracuse Univ, Syracuse, NY 13244 USA
[37] Yerevan Phys Inst, Yerevan 375036, Armenia
[38] Univ Ljubljana, SI-1000 Ljubljana, Slovenia
[39] Seoul Natl Univ, Seoul 151747, South Korea
基金
美国国家科学基金会;
关键词
ELECTRON-SCATTERING; AZIMUTHAL ASYMMETRIES; MOMENTUM; NUCLEON;
D O I
10.1103/PhysRevLett.108.052001
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
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 He-3 target. The kinematics focused on the valence quark region, 0.16 < x < 0.35 with 1.4 < Q(2) < 2.7 GeV2. The corresponding neutron A(LT) asymmetries were extracted from the measured He-3 asymmetries and proton over He-3 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 pi(-) production on He-3 and the neutron, while our pi(+) asymmetries are consistent with zero.
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页数:6
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