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Predictions for single spin asymmetries in \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\ell p^{\uparrow} \to \pi X$\end{document} and \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\gamma^* p^{\uparrow} \to \pi X$\end{document}
被引：0
作者：
M. Anselmino
M. Boglione
J. Hansson
F. Murgia
机构：
[1] Dipartimento di Fisica Teorica,
[2] Università di Torino and INFN,undefined
[3] Sezione di Torino,undefined
[4] Via P. Giuria 1,undefined
[5] 10125 Torino,undefined
[6] Italy
,undefined
[7] Department of Physics and Astronomy,undefined
[8] Vrije Universiteit Amsterdam,undefined
[9] De Boelelaan 1081,undefined
[10] 1081 HV Amsterdam,undefined
[11] The Netherlands
,undefined
[12] Department of Physics,undefined
[13] Luleå University of Technology,undefined
[14] 971 87 Luleå,undefined
[15] Sweden
,undefined
[16] Istituto Nazionale di Fisica Nucleare,undefined
[17] Sezione di Cagliari and Dipartimento di Fisica,undefined
[18] Universit à di Cagliari,undefined
[19] C.P. 170,undefined
[20] 09042 Monserrato (CA),undefined
[21] Italy
,undefined
关键词：
Transverse Momentum;
Factorization Theorem;
Spin Asymmetry;
Quark Distribution;
Transverse Spin;
D O I：
10.1007/s100520000339
中图分类号：
学科分类号：
摘要：
Predictions for the single transverse spin asymmetry \documentclass[12pt]{minimal}
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\begin{document}$A_N$\end{document} in semi-inclusive DIS processes are given; non-negligible values of \documentclass[12pt]{minimal}
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\begin{document}$A_N$\end{document} may arise from spin effects in the fragmentation of a polarized quark into a final hadron with a transverse momentum \documentclass[12pt]{minimal}
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\begin{document}$\vec k_\perp$\end{document} with respect to the jet axis, the so-called Collins effect. The elementary single spin asymmetry of the fragmenting quark has been fixed in a previous paper, by fitting data on \documentclass[12pt]{minimal}
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\begin{document}$p^\uparrow p \to \pi X$\end{document}, and by assuming that the QCD factorization theorem holds also when transverse momenta are taken into account. The predictions given here are based on the assumption that the Collins effect is the only cause of the observed single spin asymmetries in \documentclass[12pt]{minimal}
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\begin{document}$p^\uparrow p \to \pi X$\end{document}. Eventual spin and \documentclass[12pt]{minimal}
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\begin{document}$\vec k_\perp$\end{document} dependences in the quark distribution functions, the so-called Sivers effect, are also discussed.
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页码：519 / 526
页数：7
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