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Title: Polarization of Λ ( Λ ¯ ) Hyperons along the Beam Direction in Au + Au Collisions at s N N = 200 GeV

Abstract

The Λ ($$\bar{Λ}$$) hyperon polarization along the beam direction has been measured in Au+Au collisions at $$\sqrt{s_{NN}}$$=200 GeV, 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 ($$p_{T}$$) dependence at $$p_{T}$$ greater than 1 GeV/c. Furthermore, 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 azimuthal dependence of the Gaussian source radii measured with the Hanbury Brown-Twiss intensity interferometry technique reproduce well the modulation phase measured in the data and capture the centrality and transverse momentum dependence of the polarization signal.

Authors:
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Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Texas A & M Univ., College Station, TX (United States); Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Ministry of Education and Science of the Russian Federation; National Natural Science Foundation of China (NSFC); Chinese Academy of Sciences (CAS); Ministry of Science and Technology of the People’s Republic of China; Ministry of Education of China; National Research Foundation of Korea (NRF); Czech Science Foundation (GACR); Ministry of Education, Youth and Sports of the Czech Republic; Hungarian National Research, Development and Innovation Office (NRDI); Hungarian Ministry of Human Capacities; Government of India; National Science Centre of Poland (NCN); Ministry of Science, Education and Sports of the Republic of Croatia; ROSATOM of Russia; German Federal Ministry of Education and Research (BMBF)
Contributing Org.:
STAR Collaboration
OSTI Identifier:
1574337
Alternate Identifier(s):
OSTI ID: 1524566; OSTI ID: 1594831; OSTI ID: 1787580
Report Number(s):
BNL-211736-2019-JAAM
Journal ID: ISSN 0031-9007; PRLTAO; ark:/13030/qt42f564g6; TRN: US2100195
Grant/Contract Number:  
AC02-05CH11231; SC0015636; SC0012704; SC0017982; FG02-87ER40331
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 123; Journal Issue: 13; Journal ID: ISSN 0031-9007
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Relativistic heavy-ion collisions

Citation Formats

Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., Anderson, D. M., Aoyama, R., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Ashraf, M. U., Atetalla, F., Attri, A., Averichev, G. S., Bairathi, V., Barish, K., Bassill, A. J., Behera, A., Bellwied, R., Bhasin, A., Bhati, A. K., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Brandenburg, J. D., Brandin, A. V., Bryslawskyj, J., Bunzarov, I., Butterworth, J., Caines, H., Calderón de la Barca Sánchez, M., Cebra, D., Chakaberia, I., Chaloupka, P., Chan, B. K., Chang, F-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J. H., Chen, X., Cheng, J., Cherney, M., Christie, W., Crawford, H. J., Csanád, M., Das, S., Dedovich, T. G., Deppner, I. M., Derevschikov, A. A., Didenko, L., Dilks, C., Dong, X., Drachenberg, J. L., Dunlop, J. C., Edmonds, T., Elsey, N., Engelage, J., Eppley, G., Esha, R., Esumi, S., Evdokimov, O., Ewigleben, J., Eyser, O., Fatemi, R., Fazio, S., Federic, P., Fedorisin, J., Feng, Y., Filip, P., Finch, E., Fisyak, Y., Fulek, L., Gagliardi, C. A., Galatyuk, T., Geurts, F., Gibson, A., Gopal, K., Grosnick, D., Gupta, A., Guryn, W., Hamad, A. I., Hamed, A., Harris, J. W., He, L., Heppelmann, S., Heppelmann, S., Herrmann, N., Holub, L., Hong, Y., Horvat, S., Huang, B., Huang, H. Z., Huang, S. L., Huang, T., Huang, X., Humanic, T. J., Huo, P., Igo, G., Jacobs, W. W., Jena, C., Jentsch, A., JI, Y., Jia, J., Jiang, K., Jowzaee, S., Ju, X., Judd, E. G., Kabana, S., Kagamaster, S., Kalinkin, D., Kang, K., Kapukchyan, D., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Kelsey, M., Khyzhniak, Y. V., Kikoła, D. P., Kim, C., Kinghorn, T. A., Kisel, I., Kisiel, A., Kocan, M., Kochenda, L., Kosarzewski, L. K., Kramarik, L., Kravtsov, P., Krueger, K., Kulathunga Mudiyanselage, N., Kumar, L., Kunnawalkam Elayavalli, R., Kwasizur, J. H., Lacey, R., Landgraf, J. M., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Li, C., Li, W., Li, W., Li, X., Li, Y., Liang, Y., Licenik, R., Lin, T., Lipiec, A., Lisa, M. A., Liu, F., Liu, H., Liu, P., Liu, P., Liu, T., Liu, X., Liu, Y., Liu, Z., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, S., Luo, X., Ma, G. L., Ma, L., Ma, R., Ma, Y. G., Magdy Abdelwahab Abdelrahman, N., Majka, R., Mallick, D., Margetis, S., Markert, C., Matis, H. S., Matonoha, O., Mazer, J. A., Meehan, K., Mei, J. C., Minaev, N. G., Mioduszewski, S., Mishra, D., Mohanty, B., Mondal, M. M., Mooney, I., Moravcova, Z., Morozov, D. A., Nasim, Md., Nayak, K., Nelson, J. M., Nemes, D. B., Nie, M., Nigmatkulov, G., Niida, T., Nogach, L. V., Nonaka, T., Odyniec, G., Ogawa, A., Oh, K., Oh, S., Okorokov, V. A., Page, B. S., Pak, R., Panebratsev, Y., Pawlik, B., Pawlowska, D., Pei, H., Perkins, C., Pintér, R. L., Pluta, J., Porter, J., Posik, M., Pruthi, N. K., Przybycien, M., Putschke, J., Quintero, A., Radhakrishnan, S. K., Ramachandran, S., Ray, R. L., Reed, R., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Salur, S., Sandweiss, J., Schambach, J., Schmidke, W. B., Schmitz, N., Schweid, B. R., Seck, F., Seger, J., Sergeeva, M., Seto, R., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Shen, F., Shen, W. Q., Shi, S. S., Shou, Q. Y., Sichtermann, E. P., Siejka, S., Sikora, R., Simko, M., Singh, J., Singha, S., Smirnov, D., Smirnov, N., Solyst, W., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stefaniak, M., Stewart, D. J., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Sugiura, T., Sumbera, M., Summa, B., Sun, X. M., Sun, Y., Sun, Y., Surrow, B., Svirida, D. N., Szymanski, P., Tang, A. H., Tang, Z., Taranenko, A., Tarnowsky, T., Thomas, J. H., Timmins, A. R., Tlusty, D., Todoroki, T., Tokarev, M., Tomkiel, C. A., Trentalange, S., Tribble, R. E., Tribedy, P., Tripathy, S. K., Tsai, O. D., Tu, B., Tu, Z., Ullrich, T., Underwood, D. G., Upsal, I., Van Buren, G., Vanek, J., Vasiliev, A. N., Vassiliev, I., Videbæk, F., Vokal, S., Voloshin, S. A., Wang, F., Wang, G., Wang, P., Wang, Y., Wang, Y., Webb, J. C., Wen, L., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y., Xiao, Z. G., Xie, G., Xie, W., Xu, H., Xu, N., Xu, Q. H., Xu, Y. F., Xu, Z., Yang, C., Yang, Q., Yang, S., Yang, Y., Yang, Z., Ye, Z., Ye, Z., Yi, L., Yip, K., Yoo, I. -K., Zbroszczyk, H., Zha, W., Zhang, D., Zhang, L., Zhang, S., Zhang, S., Zhang, X. P., Zhang, Y., Zhang, Z., Zhao, J., Zhong, C., Zhou, C., Zhu, X., Zhu, Z., Zurek, M., and Zyzak, M. Polarization of Λ ( Λ¯ ) Hyperons along the Beam Direction in Au+Au Collisions at sNN=200 GeV. United States: N. p., 2019. Web. doi:10.1103/physrevlett.123.132301.
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Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., Anderson, D. M., Aoyama, R., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Ashraf, M. U., Atetalla, F., Attri, A., Averichev, G. S., Bairathi, V., Barish, K., Bassill, A. J., Behera, A., Bellwied, R., Bhasin, A., Bhati, A. K., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Brandenburg, J. D., Brandin, A. V., Bryslawskyj, J., Bunzarov, I., Butterworth, J., Caines, H., Calderón de la Barca Sánchez, M., Cebra, D., Chakaberia, I., Chaloupka, P., Chan, B. K., Chang, F-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J. H., Chen, X., Cheng, J., Cherney, M., Christie, W., Crawford, H. J., Csanád, M., Das, S., Dedovich, T. G., Deppner, I. M., Derevschikov, A. A., Didenko, L., Dilks, C., Dong, X., Drachenberg, J. L., Dunlop, J. C., Edmonds, T., Elsey, N., Engelage, J., Eppley, G., Esha, R., Esumi, S., Evdokimov, O., Ewigleben, J., Eyser, O., Fatemi, R., Fazio, S., Federic, P., Fedorisin, J., Feng, Y., Filip, P., Finch, E., Fisyak, Y., Fulek, L., Gagliardi, C. A., Galatyuk, T., Geurts, F., Gibson, A., Gopal, K., Grosnick, D., Gupta, A., Guryn, W., Hamad, A. I., Hamed, A., Harris, J. W., He, L., Heppelmann, S., Heppelmann, S., Herrmann, N., Holub, L., Hong, Y., Horvat, S., Huang, B., Huang, H. Z., Huang, S. L., Huang, T., Huang, X., Humanic, T. J., Huo, P., Igo, G., Jacobs, W. W., Jena, C., Jentsch, A., JI, Y., Jia, J., Jiang, K., Jowzaee, S., Ju, X., Judd, E. G., Kabana, S., Kagamaster, S., Kalinkin, D., Kang, K., Kapukchyan, D., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Kelsey, M., Khyzhniak, Y. V., Kikoła, D. P., Kim, C., Kinghorn, T. A., Kisel, I., Kisiel, A., Kocan, M., Kochenda, L., Kosarzewski, L. K., Kramarik, L., Kravtsov, P., Krueger, K., Kulathunga Mudiyanselage, N., Kumar, L., Kunnawalkam Elayavalli, R., Kwasizur, J. H., Lacey, R., Landgraf, J. M., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Li, C., Li, W., Li, W., Li, X., Li, Y., Liang, Y., Licenik, R., Lin, T., Lipiec, A., Lisa, M. A., Liu, F., Liu, H., Liu, P., Liu, P., Liu, T., Liu, X., Liu, Y., Liu, Z., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, S., Luo, X., Ma, G. L., Ma, L., Ma, R., Ma, Y. G., Magdy Abdelwahab Abdelrahman, N., Majka, R., Mallick, D., Margetis, S., Markert, C., Matis, H. S., Matonoha, O., Mazer, J. A., Meehan, K., Mei, J. C., Minaev, N. G., Mioduszewski, S., Mishra, D., Mohanty, B., Mondal, M. M., Mooney, I., Moravcova, Z., Morozov, D. A., Nasim, Md., Nayak, K., Nelson, J. M., Nemes, D. B., Nie, M., Nigmatkulov, G., Niida, T., Nogach, L. V., Nonaka, T., Odyniec, G., Ogawa, A., Oh, K., Oh, S., Okorokov, V. A., Page, B. S., Pak, R., Panebratsev, Y., Pawlik, B., Pawlowska, D., Pei, H., Perkins, C., Pintér, R. L., Pluta, J., Porter, J., Posik, M., Pruthi, N. K., Przybycien, M., Putschke, J., Quintero, A., Radhakrishnan, S. K., Ramachandran, S., Ray, R. L., Reed, R., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Salur, S., Sandweiss, J., Schambach, J., Schmidke, W. B., Schmitz, N., Schweid, B. R., Seck, F., Seger, J., Sergeeva, M., Seto, R., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Shen, F., Shen, W. Q., Shi, S. S., Shou, Q. Y., Sichtermann, E. P., Siejka, S., Sikora, R., Simko, M., Singh, J., Singha, S., Smirnov, D., Smirnov, N., Solyst, W., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stefaniak, M., Stewart, D. J., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Sugiura, T., Sumbera, M., Summa, B., Sun, X. M., Sun, Y., Sun, Y., Surrow, B., Svirida, D. N., Szymanski, P., Tang, A. H., Tang, Z., Taranenko, A., Tarnowsky, T., Thomas, J. H., Timmins, A. R., Tlusty, D., Todoroki, T., Tokarev, M., Tomkiel, C. A., Trentalange, S., Tribble, R. E., Tribedy, P., Tripathy, S. K., Tsai, O. D., Tu, B., Tu, Z., Ullrich, T., Underwood, D. G., Upsal, I., Van Buren, G., Vanek, J., Vasiliev, A. N., Vassiliev, I., Videbæk, F., Vokal, S., Voloshin, S. A., Wang, F., Wang, G., Wang, P., Wang, Y., Wang, Y., Webb, J. C., Wen, L., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y., Xiao, Z. G., Xie, G., Xie, W., Xu, H., Xu, N., Xu, Q. H., Xu, Y. F., Xu, Z., Yang, C., Yang, Q., Yang, S., Yang, Y., Yang, Z., Ye, Z., Ye, Z., Yi, L., Yip, K., Yoo, I. -K., Zbroszczyk, H., Zha, W., Zhang, D., Zhang, L., Zhang, S., Zhang, S., Zhang, X. P., Zhang, Y., Zhang, Z., Zhao, J., Zhong, C., Zhou, C., Zhu, X., Zhu, Z., Zurek, M., & Zyzak, M. Polarization of Λ ( Λ¯ ) Hyperons along the Beam Direction in Au+Au Collisions at sNN=200 GeV. United States. https://doi.org/10.1103/physrevlett.123.132301
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Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., Anderson, D. M., Aoyama, R., Aparin, A., Arkhipkin, D., Aschenauer, E. C., Ashraf, M. U., Atetalla, F., Attri, A., Averichev, G. S., Bairathi, V., Barish, K., Bassill, A. J., Behera, A., Bellwied, R., Bhasin, A., Bhati, A. K., Bielcik, J., Bielcikova, J., Bland, L. C., Bordyuzhin, I. G., Brandenburg, J. D., Brandin, A. V., Bryslawskyj, J., Bunzarov, I., Butterworth, J., Caines, H., Calderón de la Barca Sánchez, M., Cebra, D., Chakaberia, I., Chaloupka, P., Chan, B. K., Chang, F-H., Chang, Z., Chankova-Bunzarova, N., Chatterjee, A., Chattopadhyay, S., Chen, J. H., Chen, X., Cheng, J., Cherney, M., Christie, W., Crawford, H. J., Csanád, M., Das, S., Dedovich, T. G., Deppner, I. M., Derevschikov, A. A., Didenko, L., Dilks, C., Dong, X., Drachenberg, J. L., Dunlop, J. C., Edmonds, T., Elsey, N., Engelage, J., Eppley, G., Esha, R., Esumi, S., Evdokimov, O., Ewigleben, J., Eyser, O., Fatemi, R., Fazio, S., Federic, P., Fedorisin, J., Feng, Y., Filip, P., Finch, E., Fisyak, Y., Fulek, L., Gagliardi, C. A., Galatyuk, T., Geurts, F., Gibson, A., Gopal, K., Grosnick, D., Gupta, A., Guryn, W., Hamad, A. I., Hamed, A., Harris, J. W., He, L., Heppelmann, S., Heppelmann, S., Herrmann, N., Holub, L., Hong, Y., Horvat, S., Huang, B., Huang, H. Z., Huang, S. L., Huang, T., Huang, X., Humanic, T. J., Huo, P., Igo, G., Jacobs, W. W., Jena, C., Jentsch, A., JI, Y., Jia, J., Jiang, K., Jowzaee, S., Ju, X., Judd, E. G., Kabana, S., Kagamaster, S., Kalinkin, D., Kang, K., Kapukchyan, D., Kauder, K., Ke, H. W., Keane, D., Kechechyan, A., Kelsey, M., Khyzhniak, Y. V., Kikoła, D. P., Kim, C., Kinghorn, T. A., Kisel, I., Kisiel, A., Kocan, M., Kochenda, L., Kosarzewski, L. K., Kramarik, L., Kravtsov, P., Krueger, K., Kulathunga Mudiyanselage, N., Kumar, L., Kunnawalkam Elayavalli, R., Kwasizur, J. H., Lacey, R., Landgraf, J. M., Lauret, J., Lebedev, A., Lednicky, R., Lee, J. H., Li, C., Li, W., Li, W., Li, X., Li, Y., Liang, Y., Licenik, R., Lin, T., Lipiec, A., Lisa, M. A., Liu, F., Liu, H., Liu, P., Liu, P., Liu, T., Liu, X., Liu, Y., Liu, Z., Ljubicic, T., Llope, W. J., Lomnitz, M., Longacre, R. S., Luo, S., Luo, X., Ma, G. L., Ma, L., Ma, R., Ma, Y. G., Magdy Abdelwahab Abdelrahman, N., Majka, R., Mallick, D., Margetis, S., Markert, C., Matis, H. S., Matonoha, O., Mazer, J. A., Meehan, K., Mei, J. C., Minaev, N. G., Mioduszewski, S., Mishra, D., Mohanty, B., Mondal, M. M., Mooney, I., Moravcova, Z., Morozov, D. A., Nasim, Md., Nayak, K., Nelson, J. M., Nemes, D. B., Nie, M., Nigmatkulov, G., Niida, T., Nogach, L. V., Nonaka, T., Odyniec, G., Ogawa, A., Oh, K., Oh, S., Okorokov, V. A., Page, B. S., Pak, R., Panebratsev, Y., Pawlik, B., Pawlowska, D., Pei, H., Perkins, C., Pintér, R. L., Pluta, J., Porter, J., Posik, M., Pruthi, N. K., Przybycien, M., Putschke, J., Quintero, A., Radhakrishnan, S. K., Ramachandran, S., Ray, R. L., Reed, R., Ritter, H. G., Roberts, J. B., Rogachevskiy, O. V., Romero, J. L., Ruan, L., Rusnak, J., Rusnakova, O., Sahoo, N. R., Sahu, P. K., Salur, S., Sandweiss, J., Schambach, J., Schmidke, W. B., Schmitz, N., Schweid, B. R., Seck, F., Seger, J., Sergeeva, M., Seto, R., Seyboth, P., Shah, N., Shahaliev, E., Shanmuganathan, P. V., Shao, M., Shen, F., Shen, W. Q., Shi, S. S., Shou, Q. Y., Sichtermann, E. P., Siejka, S., Sikora, R., Simko, M., Singh, J., Singha, S., Smirnov, D., Smirnov, N., Solyst, W., Sorensen, P., Spinka, H. M., Srivastava, B., Stanislaus, T. D. S., Stefaniak, M., Stewart, D. J., Strikhanov, M., Stringfellow, B., Suaide, A. A. P., Sugiura, T., Sumbera, M., Summa, B., Sun, X. M., Sun, Y., Sun, Y., Surrow, B., Svirida, D. N., Szymanski, P., Tang, A. H., Tang, Z., Taranenko, A., Tarnowsky, T., Thomas, J. H., Timmins, A. R., Tlusty, D., Todoroki, T., Tokarev, M., Tomkiel, C. A., Trentalange, S., Tribble, R. E., Tribedy, P., Tripathy, S. K., Tsai, O. D., Tu, B., Tu, Z., Ullrich, T., Underwood, D. G., Upsal, I., Van Buren, G., Vanek, J., Vasiliev, A. N., Vassiliev, I., Videbæk, F., Vokal, S., Voloshin, S. A., Wang, F., Wang, G., Wang, P., Wang, Y., Wang, Y., Webb, J. C., Wen, L., Westfall, G. D., Wieman, H., Wissink, S. W., Witt, R., Wu, Y., Xiao, Z. G., Xie, G., Xie, W., Xu, H., Xu, N., Xu, Q. H., Xu, Y. F., Xu, Z., Yang, C., Yang, Q., Yang, S., Yang, Y., Yang, Z., Ye, Z., Ye, Z., Yi, L., Yip, K., Yoo, I. -K., Zbroszczyk, H., Zha, W., Zhang, D., Zhang, L., Zhang, S., Zhang, S., Zhang, X. P., Zhang, Y., Zhang, Z., Zhao, J., Zhong, C., Zhou, C., Zhu, X., Zhu, Z., Zurek, M., and Zyzak, M. Fri . "Polarization of Λ ( Λ¯ ) Hyperons along the Beam Direction in Au+Au Collisions at sNN=200 GeV". United States. https://doi.org/10.1103/physrevlett.123.132301. https://www.osti.gov/servlets/purl/1574337.
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@article{osti_1574337,
title = {Polarization of Λ ( Λ¯ ) Hyperons along the Beam Direction in Au+Au Collisions at sNN=200 GeV},
author = {Adam, J. and Adamczyk, L. and Adams, J. R. and Adkins, J. K. and Agakishiev, G. and Aggarwal, M. M. and Ahammed, Z. and Alekseev, I. and Anderson, D. M. and Aoyama, R. and Aparin, A. and Arkhipkin, D. and Aschenauer, E. C. and Ashraf, M. U. and Atetalla, F. and Attri, A. and Averichev, G. S. and Bairathi, V. and Barish, K. and Bassill, A. J. and Behera, A. and Bellwied, R. and Bhasin, A. and Bhati, A. K. and Bielcik, J. and Bielcikova, J. and Bland, L. C. and Bordyuzhin, I. G. and Brandenburg, J. D. and Brandin, A. V. and Bryslawskyj, J. and Bunzarov, I. and Butterworth, J. and Caines, H. and Calderón de la Barca Sánchez, M. and Cebra, D. and Chakaberia, I. and Chaloupka, P. and Chan, B. K. and Chang, F-H. and Chang, Z. and Chankova-Bunzarova, N. and Chatterjee, A. and Chattopadhyay, S. and Chen, J. H. and Chen, X. and Cheng, J. and Cherney, M. and Christie, W. and Crawford, H. J. and Csanád, M. and Das, S. and Dedovich, T. G. and Deppner, I. M. and Derevschikov, A. A. and Didenko, L. and Dilks, C. and Dong, X. and Drachenberg, J. L. and Dunlop, J. C. and Edmonds, T. and Elsey, N. and Engelage, J. and Eppley, G. and Esha, R. and Esumi, S. and Evdokimov, O. and Ewigleben, J. and Eyser, O. and Fatemi, R. and Fazio, S. and Federic, P. and Fedorisin, J. and Feng, Y. and Filip, P. and Finch, E. and Fisyak, Y. and Fulek, L. and Gagliardi, C. A. and Galatyuk, T. and Geurts, F. and Gibson, A. and Gopal, K. and Grosnick, D. and Gupta, A. and Guryn, W. and Hamad, A. I. and Hamed, A. and Harris, J. W. and He, L. and Heppelmann, S. and Heppelmann, S. and Herrmann, N. and Holub, L. and Hong, Y. and Horvat, S. and Huang, B. and Huang, H. Z. and Huang, S. L. and Huang, T. and Huang, X. and Humanic, T. J. and Huo, P. and Igo, G. and Jacobs, W. W. and Jena, C. and Jentsch, A. and JI, Y. and Jia, J. and Jiang, K. and Jowzaee, S. and Ju, X. and Judd, E. G. and Kabana, S. and Kagamaster, S. and Kalinkin, D. and Kang, K. and Kapukchyan, D. and Kauder, K. and Ke, H. W. and Keane, D. and Kechechyan, A. and Kelsey, M. and Khyzhniak, Y. V. and Kikoła, D. P. and Kim, C. and Kinghorn, T. A. and Kisel, I. and Kisiel, A. and Kocan, M. and Kochenda, L. and Kosarzewski, L. K. and Kramarik, L. and Kravtsov, P. and Krueger, K. and Kulathunga Mudiyanselage, N. and Kumar, L. and Kunnawalkam Elayavalli, R. and Kwasizur, J. H. and Lacey, R. and Landgraf, J. M. and Lauret, J. and Lebedev, A. and Lednicky, R. and Lee, J. H. and Li, C. and Li, W. and Li, W. and Li, X. and Li, Y. and Liang, Y. and Licenik, R. and Lin, T. and Lipiec, A. and Lisa, M. A. and Liu, F. and Liu, H. and Liu, P. and Liu, P. and Liu, T. and Liu, X. and Liu, Y. and Liu, Z. and Ljubicic, T. and Llope, W. J. and Lomnitz, M. and Longacre, R. S. and Luo, S. and Luo, X. and Ma, G. L. and Ma, L. and Ma, R. and Ma, Y. G. and Magdy Abdelwahab Abdelrahman, N. and Majka, R. and Mallick, D. and Margetis, S. and Markert, C. and Matis, H. S. and Matonoha, O. and Mazer, J. A. and Meehan, K. and Mei, J. C. and Minaev, N. G. and Mioduszewski, S. and Mishra, D. and Mohanty, B. and Mondal, M. M. and Mooney, I. and Moravcova, Z. and Morozov, D. A. and Nasim, Md. and Nayak, K. and Nelson, J. M. and Nemes, D. B. and Nie, M. and Nigmatkulov, G. and Niida, T. and Nogach, L. V. and Nonaka, T. and Odyniec, G. and Ogawa, A. and Oh, K. and Oh, S. and Okorokov, V. A. and Page, B. S. and Pak, R. and Panebratsev, Y. and Pawlik, B. and Pawlowska, D. and Pei, H. and Perkins, C. and Pintér, R. L. and Pluta, J. and Porter, J. and Posik, M. and Pruthi, N. K. and Przybycien, M. and Putschke, J. and Quintero, A. and Radhakrishnan, S. K. and Ramachandran, S. and Ray, R. L. and Reed, R. and Ritter, H. G. and Roberts, J. B. and Rogachevskiy, O. V. and Romero, J. L. and Ruan, L. and Rusnak, J. and Rusnakova, O. and Sahoo, N. R. and Sahu, P. K. and Salur, S. and Sandweiss, J. and Schambach, J. and Schmidke, W. B. and Schmitz, N. and Schweid, B. R. and Seck, F. and Seger, J. and Sergeeva, M. and Seto, R. and Seyboth, P. and Shah, N. and Shahaliev, E. and Shanmuganathan, P. V. and Shao, M. and Shen, F. and Shen, W. Q. and Shi, S. S. and Shou, Q. Y. and Sichtermann, E. P. and Siejka, S. and Sikora, R. and Simko, M. and Singh, J. and Singha, S. and Smirnov, D. and Smirnov, N. and Solyst, W. and Sorensen, P. and Spinka, H. M. and Srivastava, B. and Stanislaus, T. D. S. and Stefaniak, M. and Stewart, D. J. and Strikhanov, M. and Stringfellow, B. and Suaide, A. A. P. and Sugiura, T. and Sumbera, M. and Summa, B. and Sun, X. M. and Sun, Y. and Sun, Y. and Surrow, B. and Svirida, D. N. and Szymanski, P. and Tang, A. H. and Tang, Z. and Taranenko, A. and Tarnowsky, T. and Thomas, J. H. and Timmins, A. R. and Tlusty, D. and Todoroki, T. and Tokarev, M. and Tomkiel, C. A. and Trentalange, S. and Tribble, R. E. and Tribedy, P. and Tripathy, S. K. and Tsai, O. D. and Tu, B. and Tu, Z. and Ullrich, T. and Underwood, D. G. and Upsal, I. and Van Buren, G. and Vanek, J. and Vasiliev, A. N. and Vassiliev, I. and Videbæk, F. and Vokal, S. and Voloshin, S. A. and Wang, F. and Wang, G. and Wang, P. and Wang, Y. and Wang, Y. and Webb, J. C. and Wen, L. and Westfall, G. D. and Wieman, H. and Wissink, S. W. and Witt, R. and Wu, Y. and Xiao, Z. G. and Xie, G. and Xie, W. and Xu, H. and Xu, N. and Xu, Q. H. and Xu, Y. F. and Xu, Z. and Yang, C. and Yang, Q. and Yang, S. and Yang, Y. and Yang, Z. and Ye, Z. and Ye, Z. and Yi, L. and Yip, K. and Yoo, I. -K. and Zbroszczyk, H. and Zha, W. and Zhang, D. and Zhang, L. and Zhang, S. and Zhang, S. and Zhang, X. P. and Zhang, Y. and Zhang, Z. and Zhao, J. and Zhong, C. and Zhou, C. and Zhu, X. and Zhu, Z. and Zurek, M. and Zyzak, M.},
abstractNote = {The Λ ($\bar{Λ}$) hyperon polarization along the beam direction has been measured in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV, 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 ($p_{T}$) dependence at $p_{T}$ greater than 1 GeV/c. Furthermore, 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 azimuthal dependence of the Gaussian source radii measured with the Hanbury Brown-Twiss intensity interferometry technique reproduce well the modulation phase measured in the data and capture the centrality and transverse momentum dependence of the polarization signal.},
doi = {10.1103/physrevlett.123.132301},
journal = {Physical Review Letters},
number = 13,
volume = 123,
place = {United States},
year = {2019},
month = {9}
}
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    Local spin polarization in high energy heavy ion collisions
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    Local spin polarization in high energy heavy ion collisions
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