作者
Jaroslav Adam, Leszek Adamczyk, JR Adams, JK Adkins, Geydar Agakishiev, MM Aggarwal, Zubayer Ahammed, Igor Alekseev, DM Anderson, Ryo Aoyama, A Aparin, D Arkhipkin, EC Aschenauer, MU Ashraf, F Atetalla, A Attri, GS Averichev, V Bairathi, K Barish, AJ Bassill, A Behera, R Bellwied, A Bhasin, AK Bhati, J Bielcik, J Bielcikova, LC Bland, IG Bordyuzhin, JD Brandenburg, AV Brandin, J Bryslawskyj, I Bunzarov, J Butterworth, H Caines, M Calderón de la Barca Sánchez, D Cebra, I Chakaberia, P Chaloupka, BK Chan, FH Chang, Z Chang, N Chankova-Bunzarova, A Chatterjee, S Chattopadhyay, JH Chen, X Chen, J Cheng, M Cherney, W Christie, HJ Crawford, M Csanád, S Das, TG Dedovich, IM Deppner, AA Derevschikov, L Didenko, C Dilks, X Dong, JL Drachenberg, JC Dunlop, T Edmonds, N Elsey, J Engelage, G Eppley, R Esha, S Esumi, O Evdokimov, J Ewigleben, O Eyser, R Fatemi, S Fazio, P Federic, J Fedorisin, Y Feng, P Filip, E Finch, Y Fisyak, L Fulek, CA Gagliardi, T Galatyuk, F Geurts, A Gibson, K Gopal, D Grosnick, A Gupta, W Guryn, AI Hamad, A Hamed, JW Harris, L He, S Heppelmann, S Heppelmann, N Herrmann, L Holub, Y Hong, S Horvat, B Huang, HZ Huang, SL Huang, T Huang, X Huang, TJ Humanic, P Huo, G Igo, WW Jacobs, C Jena, A Jentsch, Y JI, J Jia, K Jiang, S Jowzaee, X Ju, EG Judd, S Kabana, S Kagamaster, D Kalinkin, K Kang, D Kapukchyan, K Kauder, HW Ke, D Keane, A Kechechyan, M Kelsey, YV Khyzhniak, DP Kikoła, C Kim, TA Kinghorn, I Kisel, A Kisiel, M Kocan, L Kochenda, LK Kosarzewski, L Kramarik, P Kravtsov, K Krueger, N Kulathunga Mudiyanselage, L Kumar, R Kunnawalkam Elayavalli, JH Kwasizur, R Lacey, JM Landgraf, J Lauret, A Lebedev, R Lednicky, JH Lee, C Li, W Li, W Li, X Li, Y Li
发表日期
2019/9/27
期刊
Physical review letters
卷号
123
期号
13
页码范围
132301
出版商
American Physical Society
简介
The () hyperon polarization along the beam direction has been measured in collisions at , for the first time in heavy-ion collisions. The polarization dependence on the hyperons’ emission angle relative to the elliptic flow plane exhibits a second harmonic sine modulation, indicating a quadrupole pattern of the vorticity component along the beam direction, expected due to elliptic flow. The polarization is found to increase in more peripheral collisions, and shows no strong transverse momentum () dependence at greater than . The magnitude of the signal is about 5 times smaller than those predicted by hydrodynamic and multiphase transport models; the observed phase of the emission angle dependence is also opposite to these model predictions. In contrast, the kinematic vorticity calculations in the blast-wave model tuned to reproduce particle spectra, elliptic flow, and the …
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J Adam, L Adamczyk, JR Adams, JK Adkins… - Physical review letters, 2019