Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ³He Target
Zhao, Y. X. · Wang, Y. · 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. · de Jager, C. W. · De Leo, R. · Deng, X. · Deur, A. · Ding, H. · Dolph, P. A. M. · Dutta, C. · Dutta, D. · Fassi, L. El · Frullani, S. · Gao, H. · Garibaldi, F. · Gaskell, D. · Gilad, S. · Gilman, R. · Glamazdin, O. · Golge, S. · Guo, L. · Hamilton, D. · Hansen, O. · Higinbotham, D. W. · Holmstrom, T. · Huang, J. · Huang, M. · Ibrahim, H. F · Iodice, M. · Jiang, X. · Jin, G. · Jones, M. K. · Katich, J. · Kelleher, A. · Kim, W. · Kolarkar, A. · Korsch, W. · LeRose, J. J. · Li, X. · Li, Y. · Lindgren, R. · Liyanage, N. · Long, E. · Lu, 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, Y. · Osipenko, M. · Parno, D. · Peng, J. -C. · Phillips, S. K. · Posik, M. · Puckett, A. J. R. · Qian, X. · Qiang, Y. · Rakhman, A. · Ransome, R. · Riordan, S. · Saha, A. · Sawatzky, B. · Schulte, E. · Shahinyan, A. · Shabestari, M. H. · Širca, S. · Stepanyan, S. · Subedi, R. · Sulkosky, V. · Tang, L. -G. · Tobias, A. · Urciuoli, G. M. · Vilardi, I. · Wang, K. · Wojtsekhowski, B. · Yan, X. · Yao, H. · Ye, Y. · Ye, Z. · Yuan, L. · Zhan, X. · Zhang, Y. · Zhang, Y. -W. · Zhao, B. · Zheng, X. · Zhu, L. · Zhu, X. · Zong, X.
Original · EN
We report the first measurement of target single spin asymmetries of charged kaons produced in semi-inclusive deep inelastic scattering of electrons off a transversely polarized ³He target. Both the Collins and Sivers moments, which are related to the nucleon transversity and Sivers distributions, respectively, are extracted over the kinematic range of 0.1<xbj<0.4 for K⁺ and K⁻ production. While the Collins and Sivers moments for K⁺ are consistent with zero within the experimental uncertainties, both moments for K⁻ favor negative values. The Sivers moments are compared to the theoretical prediction from a phenomenological fit to the world data. While the K⁺ Sivers moments are consistent with the prediction, the K⁻ results differ from the prediction at the 2-sigma level.
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