Double spin asymmetries of inclusive hadron electroproduction from a transversely polarized<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">He</mml:mi><mml:mprescripts/><mml:none/><mml:mn>3</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>target

Zhao, Y. X.; Allada, K.; 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.; Jager, C. W. de; Лео, Р. Де; Deng, X.; Deur, A.; Ding, H.; Dolph, P. A. M.; Dutta, C.; Dutta, D.; Fassi, L. El; Frullani, S.; H, Gao; Garibaldi, F.; Gaskell, D.; Gilad, S.; Gilman, R.; Glamazdin, O.; Golge, S.; Guo, L. B.; Hamilton, D.; Hansén, O.; Higinbotham, D. W.; Holmstrom, T.; Huang, J.; Huang, Min; Ibrahim, H.; Iodice, M.; Jiang, X.; Gao, Jin; Jones, M.; Katich, Joseph M.; Kelleher, A.; Kim, W.; Kolarkar, A.; Korsch, W.; LeRose, J.; Li, X.; Li, Y.; Lindgren, R.; Liyanage, N.; Long, E.; Lü, H. J.; Margaziotis, D. J.; Markowitz, P.; Marrone, S.; McNulty, D.; Meziani, Z. E.; Michaels, R.; Moffit, B.; Camacho, C. Muñoz; Nanda, S.; Narayan, A.; Nelyubin, V.; Norum, B.; Oh, Yongseok; Osipenko, M.; Parno, D. S.; Peng, J. C.; Phillips, S. K.; Posik, M.; Puckett, A. J. R.; Qian, X.; Qiang, Y.; Rakhman, A.; Ransome, R. D.; Riordan, S.; Saha, A.; Sawatzky, B.; Schulte, E.; Shahinyan, A.; Shabestari, M.; Širca, S.; Stepanyan, S.; Subedi, R.; Sulkosky, V.; Tang, L.; Tobias, W. A.; Urciuoli, G. M.; Vilardi, I.; Wang, K.; Wojtsekhowski, B.; Wang, Y.; Yan, X.; Huang, Yao; Ye, Y.; Ye, Z.; Yuan, L.; Zhan, X.; Zhang, Y.; Zhang, Y. W.; Zhao, B.; Zheng, X.; Zhu, Lei; Zhu, X.; Zong, X.

doi:10.1103/physrevc.92.015207

Cited by 11 publications

(6 citation statements)

References 19 publications

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“…Measurements of SSAs at Jefferson Lab (JLab) with longitudinally polarized proton [16] and transversely polarized neutron [17,18,19,20] targets suggest that spin-orbit correlations are significant for certain combinations of quark and nucleon spins and transverse momenta. Large spin-azimuthal asymmetries were observed at JLab using a longitudinally polarized beam [21,22] in one case and a transversely polarized 3 He target in the other [23]. These results are consistent with the corresponding HERMES [24] and COMPASS [25] measurements, which were interpreted in terms of highertwist contributions related to quark-gluon correlations.…”

supporting

confidence: 85%

Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS

et al. 2018

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We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic 14 NH 3 target, and extracted double and single target spin asymmetries for ep → e ′ π 0 X in multidimensional bins in fourmomentum transfer (1.0 < Q 2 < 3.2 GeV 2 ), Bjorken-x (0.12 < x < 0.48), hadron energy fraction (0.4 < z < 0.7), transverse pion momentum (0 < P T < 1.0 GeV), and azimuthal angle φ h between the lepton scattering and hadron production planes. We extracted asymmetries as a function of both x and P T , which provide access to transverse-momentum distributions of longitudinally polarized quarks. The double spin asymmetries depend weakly on P T . The sin 2φ h moments are zero within uncertainties, which is consistent with the expected suppression of the Collins fragmentation function. The observed sin φ h moments suggest that quark gluon correlations are significant at large x.Keywords: Semi-inclusive deep-inelastic scattering, single spin asymmetries, double spin asymmetries, transverse momentum distributions, Collins fragmentation.Despite several decades of research, the spin structure of the proton remains incompletely understood [1]. The quark and gluon spins can only

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supporting

confidence: 85%

Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS

et al. 2018

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“…The asymmetry A N ↑ →h X LT is very sensitive to the worm-gear function g 1T , one of the leading twist transverse momentum dependent quark distributions [33]. We made a comparison with data from JLab [7] by exploring two models for g 1T [3]. For one of the models we obtained qualitative agreement with the data.…”

Section: Longitudinal-transverse Double-spin Asymmetry In N ↑ → H Xmentioning

confidence: 67%

“…The HERMES Collaboration [4] and the Hall A Collaboration at Jefferson Lab (JLab) [5] measured A N for N ↑ → h X. Moreover, HERMES took data for the production of transversely polarized Λ hyperons [6], while A LT was measured at JLab [7]. One should try to understand those data and explore what one can learn from them.…”

Section: Introductionmentioning

confidence: 99%

Twist-3 spin Asymmetries in $\ell N \to h X$ Studied in Collinear Factorization

Metz

Kanazawa

Kang

et al. 2016

Proceedings of QCD Evolution 2015 — PoS(QCDEV2015)

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“…With the use of hybrid SEOP, the 3 He polarization was increased to ~45% for a more recent measurement of the neutron’s electric form factor (Riordan et al , 2010). For hybrid SEOP with spectrally narrowed lasers, the polarization has been increased to between 50 % and 55 % for studies of asymmetries in scattering from transversely or vertically polarized targets generally aimed at improved understanding of the origin of the neutron’s spin (Allada et al , 2014; Huang et al , 2012; Katich et al , 2014; Parno et al , 2015; Qian et al , 2011; Zhang et al , 2014; Zhao et al , 2015). In a detailed study of these targets, a maximum off-line value of 70 % and a detailed analysis of achievable polarization was reported (Singh et al , 2015).…”

Section: Charged Particle and Photon Scattering Targetsmentioning

confidence: 99%

Optically polarizedHe3

et al. 2017

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This article reviews the physics and technology of producing large quantities of highly spin-polarized 3He nuclei using spin-exchange (SEOP) and metastability-exchange (MEOP) optical pumping. Both technical developments and deeper understanding of the physical processes involved have led to substantial improvements in the capabilities of both methods. For SEOP, the use of spectrally narrowed lasers and K-Rb mixtures has substantially increased the achievable polarization and polarizing rate. For MEOP nearly lossless compression allows for rapid production of polarized 3He and operation in high magnetic fields has likewise significantly increased the pressure at which this method can be performed, and revealed new phenomena. Both methods have benefitted from development of storage methods that allow for spin-relaxation times of hundreds of hours, and specialized precision methods for polarimetry. SEOP and MEOP are now widely applied for spin-polarized targets, neutron spin filters, magnetic resonance imaging, and precision measurements.

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Double spin asymmetries of inclusive hadron electroproduction from a transversely polarizedHe3target

Cited by 11 publications

References 19 publications

Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS

Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS

Twist-3 spin Asymmetries in $\ell N \to h X$ Studied in Collinear Factorization

Optically polarizedHe3

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