| Title: |
Hyperon global polarization in isobar Ru+Ru and Zr+Zr collisions at √sNN = 200GeV |
| Authors: |
Aboona, Bassam; Adam, Jaroslav; Agakishiev, Geydar; Aggarwal, Ishu; Aggarwal, Madan Mohan; Ahammed, Zubayer; Aitbayev, Alisher; Alekseev, Igor G.; Alpatov, Egor; Alshammri, Albandry K.; Aparin, Alexey; Aslam, Sameer; Atchison, J.; Averichev, Georgy S.; Bairathi, Vipul; Bao, X.; Barik, P.; Barish, Kenneth; Behera, S.; Bhagat, Pratibha; Bhasin, Anju; Bhatta, Somadutta; Bordyuzhin, I.G.; Brandenburg, James D.; Brandin, Andrei V.; Broodo, Caleb; Cai, X.Z.; Caines, Helen Louise; Calderón de la Barca Sánchez, Manuel; Cebra, Daniel A.; Češka, Jakub; Chakaberia, Irakli; Chang, Y.S.; Chang, Z.; Chatterjee, A.; Chen, D.; Chen, J.H.; Chen, Q.; Chen, W.; Chen, Z.; Cheng, J.; Cheng, Y.; Christie, William; Chu, Xiaoxuan; Corey, S.; Crawford, Henry J.; Csanád, Máté; Dale-Gau, Gabriel; Das, A.; Dedovič, Tatiana G.; Deppner, Ingo Martin; Derevschikov, Anatoly A.; Deshpande, A.; Dhamija, A.; Dimri, A.; Dixit, Prabhupada; Dong, X.; Drachenberg, James Lucus; Duckworth, Emilie; Dunlop, James C.; El-Feky, Y.S.; Engelage, Jon M.; Eppley, Geary Wareham; Esumi, ShinIchi; Evdokimov, Olga Y.; Eyser, Kjeld Oleg; Fan, B.; Fatemi, Renee H.; Fazio, Salvatore; Feng, H.; Feng, Yicheng; Finch, Evan; Fisyak, Yuri V.; Flor, Fernando Antonio; Fu, C.; Fu, T.; Gao, T.; Gao, Y.; Geurts, Frank; Gibson, Adam; Gopal, Krishan; Gou, X.; Grosnick, David P.; Gu, A.; Gupta, Anik; Guryn, Włodzimierz; Hamed, Ahmed M.; Hamilton, R.J.; Han, J.; Han, X.; Harasty, Matthew D.; Harris, John W.; Harrison-Smith, Hannah; Havener, L.B.; He, Xionghong; He, Y.; Hu, C.; Hu, Q.; Hu, Y.; Huang, H.; Huang, Huan Zhong; Huang, Shengli; Huang, T.; Huang, Y.; Isshiki, M.; Jacobs, William W.; Jalotra, Ashish; Jena, Chitrasen; Ji, Yuanjing; Jia, Jiangyong; Jiang, X.; Jin, C.; Jin, Y.; Jindal, N.; Ju, Xin-Yue; Judd, Eleanor G.; Kabana, Sonia; Kalinkin, Dmitry; Kang, K.; Kapukchyan, David; Kauder, Kolja; Keane, Declan; Kechechyan, Armen; Kesler, M.; Khanal, A.; Kim, J.; Kiselev, A.; Knospe, Anders Garritt; Kochenda, L.; Korobitsin, A.A.; Korodi, B.; Yu Kraeva, A.; Kravtsov, P.; Kumar, Lokesh; Labonte, Mathias C.; Lacey, Roy Alphanso; Landgraf, Jeffery M.; Larson, C.; Lebedev, A.; Lednicky, R.; Lee, J.H.; Leung, Yue Hang; Li, C.; Li, D.; Li, H-S; Li, H.; Li, W.; Li, X.; Li, Y.; Li, Z.; Liang, X.; Lin, T.; Lin, Y.; Liu, C.; Liu, G.; Liu, H.; Liu, L.; Liu, Z.; Ljubicic, Tonko A.; Lomicky, O.; Loyd, E.M.; Lu, T.; Luo, J.; Luo, X.F.; Luong, V.B.; Ma, L.; Ma, R.; Ma, Y.G.; Magdy Abdelwahab Abdelrahman, Niseem; Manikandhan, Rutik; Margetis, Spyridon; Matonoha, O.; Mi, Ke; Minaev, N.G.; Mohanty, Bedangadas; Mondal, B.; Mouli, Mriganka Mouli; Mooney, Isaac A.; Morozov, D.A.; Nagy, M.I.; Naim, C.J.; Nain, A.S.; Nam, J.D.; Nasim, M.; Nasrulloh, H.; Nedorezov, E.; Nelson, John M.; Nie, M.; Nigmatkulov, Grigory A.; Niida, Takafumi; Nogach, L.V.; Nonaka, Toshihiro; Odyniec, Grazyna Janina; Ogawa, Akio; Oh, Saehanseul; Okorokov, Vitaly A.; Okubo, K.; Page, Brian S.; Pal, S.; Pandav, Ashish; Panday, A.; Pandey, A.K.; Panebratsev, Yuri; Pani, Tanmay; Parfenov, P.; Paul, A.; Paul, S.; Perkins, Chris; Ping, S.; Pokhrel, B.R.; Ponce Pinto, I.D.; Posik, Matthew; Pottebaum, E.; Povarov, A.; Prodhan, S.; Protzman, T.L.; Pruthi, Navneet Kumar; Putschke, Jörn H.; Qi, Y.; Qin, Z.; Qiu, H.; Racz, Cameron; Radhakrishnan, Sooraj Krishnan; Rana, Aditya; Ray, Robert L.; Robertson, C.W.; Rogachevsky, O.V.; Rosales Aguilar, Manuel A.; Roy, D.; Ruan, L.; Sahoo, Aswini Kumar; Sahoo, Nihar Ranjan; Sako, H.; Salur, Sevil; Sambyal, S.S.; Samigullin, E.; Sandhu, J.K.; Sato, Susumu; Schaefer, Brennan C.; Schmitz, Norbert; Seger, Janet Elizabeth; Seto, Richard; Seyboth, Peter; Shah, N.; Shahaliev, E.; Shanmuganathan, Prashanth V.; Shao, Tianhao; Sharma, Monika; Sharma, Natasha; Sharma, R.; Sharma, S.R.; Sheikh, Ashik Ikbal; Shen, D.; Shen, Diyu; Shen, Kaifei; Shi, S.; Shi, Y.; Si, F.; Singh, J.; Singha, Subhash; Sinha, P.; Skoby, Michael J.; Söhngen, Yannick; Song, Y.; D S Stanislaus, T.; Strikhanov, M.; Su, Y.; Sun, X.; Sun, Y.; Surrow, Bernd; Svirida, D.N.; Sweger, Z.W.; Tamis, Andrew C.; Tang, Aihong; Tang, Zebo; Taranenko, Arkadiy; Tarnowsky, Terence J.; Thomas, James H.; Timofeev, A.; Tlusty, David; Tokarev, M.V.; Torres Valladares, D.; Trentalange, Stephen; Tribedy, Prithwish; Tsai, Oleg D.; Tsang, C.Y.; Tu, Zhoudunming; Tyler, J.E.; Ullrich, Thomas; Underwood, David G.; Van Buren, Gene; Vasiliev, A.N.; Videbæk, Flemming; Vokal, S.; Voloshin, Sergei; Wang, F.; Wang, G.; Wang, J.S.; Wang, J.; Wang, K.; Wang, X.; Wang, Y.; Wang, Z.; Webb, Jason C.; Weidenkaff, Philipp; Westfall, Gary D.; Wieman, Howard; Wilks, G.; Wissink, Scott W.; Wong, C.P.; Wu, J.; Wu, X.; Xi, B.; Xiao, Y.; Xiao, Z.G.; Xie, Guannan; Xie, W.; Xu, H.; Xu, N.; Xu, Qinghua; Xu, Y.; Xu, Z.; Yan, G.; Yan, Z.; Yang, C.; Yang, Q.; Yang, S.; Yang, Y.; Ye, Z.; Yi, L.; Yu, Y.; Zha, Wangmei; Zhang, C.; Zhang, Dingwei; Zhang, J.; Zhang, L.; Zhang, S.; Zhang, W.; Zhang, X.; Zhang, Y.; Zhang, Z.; Zhao, F.; Zhao, J.; Zhou, S.; Zhou, Y.; Zhu, X.; Żurek, Maria Katarzyna; Zyzak, Maksym |
| Contributors: |
STAR Collaboration |
| Publication Year: |
2025 |
| Collection: |
Publication Server of Goethe University Frankfurt am Main |
| Subject Terms: |
ddc:530 |
| Description: |
The polarization of Λ, Λ̄ , Ξ −, and Ξ̄ + hyperons along the angular momentum of the system has been measured in isobar collisions of Ru+Ru and Zr+Zr at √𝑠 NN = 200 GeV with the STAR detector at RHIC. The polarization dependence on collision centrality exhibits an increasing trend in more peripheral collisions. Λ and Λ̄ polarization dependence on the transverse momentum and pseudorapidity have been investigated, but no significant dependence was observed. The polarizations of Λ and Λ̄ are found to be consistent with each other, indicating little contribution of the spin-magnetic coupling to the measured polarization. Comparison to previously measured polarization in Au+Au collisions show no obvious system size dependence. The results are qualitatively consistent with hydrodynamic calculations including contributions from shear-induced polarization and thermal vorticity. For the first time in heavy-ion collisions, the dependence of the global polarization on the hyperon’s emission azimuthal angle relative to the second-order event plane has been measured, indicating stronger polarization for the in-plane emitted hyperons at the level of 2.4𝜎 significance in 20–50 % centrality. The Ξ hyperon polarization measurements via polarization transfer analysis yield finite positive values with 2.9𝜎 significance in 20–50 % centrality, slightly larger compared to the inclusive Λ polarization. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
English |
| Relation: |
https://doi.org/10.1016/j.physletb.2025.139891 |
| DOI: |
10.1016/j.physletb.2025.139891 |
| Availability: |
http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/94648; https://nbn-resolving.org/urn:nbn:de:hebis:30:3-946485; https://doi.org/10.1016/j.physletb.2025.139891; http://publikationen.ub.uni-frankfurt.de/files/94648/1-s2.0-S0370269325006501-main.pdf |
| Rights: |
https://creativecommons.org/licenses/by/4.0/deed.de ; info:eu-repo/semantics/openAccess |
| Accession Number: |
edsbas.5B9F222B |
| Database: |
BASE |