Skip to main navigation Skip to search Skip to main content

Hyperon global polarization in isobar Ru+Ru and Zr+Zr collisions at sNN=200GeV

  • B. E. Aboona
  • , J. Adam
  • , G. Agakishiev
  • , I. Aggarwal
  • , M. M. Aggarwal
  • , Z. Ahammed
  • , A. Aitbayev
  • , I. Alekseev
  • , E. Alpatov
  • , A. K. Alshammri
  • , A. Aparin
  • , S. Aslam
  • , J. Atchison
  • , G. S. Averichev
  • , V. Bairathi
  • , X. Bao
  • , P. Barik
  • , K. Barish
  • , S. Behera
  • , P. Bhagat
  • A. Bhasin, S. Bhatta, I. G. Bordyuzhin, J. D. Brandenburg, A. V. Brandin, C. Broodo, X. Z. Cai, H. Caines, M. Calderón de La Barca Sánchez, D. Cebra, J. Ceska, I. Chakaberia, Y. S. Chang, Z. Chang, A. Chatterjee, D. Chen, J. H. Chen, Q. Chen, W. Chen, Z. Chen, J. Cheng, Y. Cheng, W. Christie, X. Chu, S. Corey, H. J. Crawford, M. Csanad, G. Dale-Gau, A. Das, T. G. Dedovich, I. M. Deppner, A. A. Derevschikov, A. Deshpande, A. Dhamija, A. Dimri, P. Dixit, X. Dong, J. L. Drachenberg, E. Duckworth, J. C. Dunlop, Y. S. El-Feky, J. Engelage, G. Eppley, S. Esumi, O. Evdokimov, O. Eyser, B. Fan, R. Fatemi, S. Fazio, H. Feng, Y. Feng, E. Finch, Y. Fisyak, F. A. Flor, C. Fu, T. Fu, T. Gao, Y. Gao, F. Geurts, A. Gibson, K. Gopal, X. Gou, D. Grosnick, A. Gu, A. Gupta, W. Guryn, A. Hamed, R. J. Hamilton, J. Han, X. Han, M. D. Harasty, J. W. Harris, H. Harrison-Smith, L. B. Havener, X. H. He, Y. He, C. Hu, Q. Hu, Y. Hu, H. Huang, H. Z. Huang, S. L. Huang, T. Huang, Y. Huang, Y. Huang, Y. Huang, M. Isshiki, W. W. Jacobs, A. Jalotra, C. Jena, Y. Ji, J. Jia, X. Jiang, C. Jin, Y. Jin, N. Jindal, X. Ju, E. G. Judd, S. Kabana, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, D. Keane, A. Kechechyan, M. Kesler, A. Khanal, J. Kim, A. Kiselev, A. G. Knospe, L. Kochenda, A. A. Korobitsin, B. Korodi, A. Yu Kraeva, P. Kravtsov, L. Kumar, M. C. Labonte, R. Lacey, J. M. Landgraf, C. Larson, A. Lebedev, R. Lednicky, J. H. Lee, Y. H. Leung, C. Li, D. Li, H. S. Li, H. Li, H. Li, H. Li, W. Li, X. Li, X. Li, Y. Li, Z. Li, Z. Li, X. Liang, T. Lin, Y. Lin, C. Liu, G. Liu, H. Liu, L. Liu, L. Liu, Z. Liu, Z. Liu, T. Ljubicic, O. Lomicky, E. M. Loyd, T. Lu, J. Luo, X. F. Luo, V. B. Luong, L. Ma, R. Ma, Y. G. Ma, N. Magdy, R. Manikandhan, S. Margetis, O. Matonoha, K. Mi, N. G. Minaev, B. Mohanty, B. Mondal, M. M. Mondal, I. Mooney, D. A. Morozov, M. I. Nagy, C. J. Naim, A. S. Nain, J. D. Nam, M. Nasim, H. Nasrulloh, E. Nedorezov, J. M. Nelson, M. Nie, G. Nigmatkulov, T. Niida, L. V. Nogach, T. Nonaka, G. Odyniec, A. Ogawa, S. Oh, V. A. Okorokov, K. Okubo, B. S. Page, S. Pal, A. Pandav, A. Panday, A. K. Pandey, Y. Panebratsev, T. Pani, P. Parfenov, A. Paul, S. Paul, C. Perkins, S. Ping, B. R. Pokhrel, I. D. Ponce Pinto, M. Posik, E. Pottebaum, A. Povarov, S. Prodhan, T. L. Protzman, N. K. Pruthi, J. Putschke, Y. Qi, Z. Qin, H. Qiu, C. Racz, S. K. Radhakrishnan, A. Rana, R. L. Ray, C. W. Robertson, O. V. Rogachevsky, M. A. Rosales Aguilar, D. Roy, L. Ruan, A. K. Sahoo, N. R. Sahoo, H. Sako, S. Salur, S. S. Sambyal, E. Samigullin, J. K. Sandhu, S. Sato, B. C. Schaefer, N. Schmitz, J. Seger, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P. V. Shanmuganathan, T. Shao, M. Sharma, N. Sharma, R. Sharma, S. R. Sharma, A. I. Sheikh, D. Shen, D. Y. Shen, K. Shen, S. Shi, Y. Shi, F. Si, J. Singh, S. Singha, P. Sinha, M. J. Skoby, Y. Söhngen, Y. Song, T. D.S. Stanislaus, M. Strikhanov, Y. Su, X. Sun, Y. Sun, B. Surrow, D. N. Svirida, Z. W. Sweger, A. C. Tamis, A. H. Tang, Z. Tang, A. Taranenko, T. Tarnowsky, J. H. Thomas, A. Timofeev, D. Tlusty, M. V. Tokarev, D. Torres Valladares, S. Trentalange, P. Tribedy, O. D. Tsai, C. Y. Tsang, Z. Tu, J. E. Tyler, T. Ullrich, D. G. Underwood, G. Van Buren, A. N. Vasiliev, F. Videbæk, S. Vokal, S. A. Voloshin, F. Wang, G. Wang, G. Wang, J. S. Wang, J. Wang, K. Wang, X. Wang, Y. Wang, Y. Wang, Y. Wang, Z. Wang, Z. Wang, J. C. Webb, P. C. Weidenkaff, G. D. Westfall, H. Wieman, G. Wilks, S. W. Wissink, C. P. Wong, J. Wu, X. Wu, X. Wu, X. Wu, B. Xi, Y. Xiao, Z. G. Xiao, G. Xie, W. Xie, H. Xu, N. Xu, Q. H. Xu, Y. Xu, Y. Xu, Y. Xu, Y. Xu, Z. Xu, Z. Xu, G. Yan, Z. Yan, C. Yang, Q. Yang, S. Yang, Y. Yang, Z. Ye, Z. Ye, L. Yi, Y. Yu, W. Zha, C. Zhang, D. Zhang, J. Zhang, L. Zhang, S. Zhang, W. Zhang, X. Zhang, Y. Zhang, Y. Zhang, Y. Zhang, Y. Zhang, Z. Zhang, Z. Zhang, F. Zhao, J. Zhao, S. Zhou, Y. Zhou, X. Zhu, M. Zurek, M. Zyzak
  • Texas A&M University
  • Czech Technical University in Prague
  • Joint Institute for Nuclear Research
  • Panjab University
  • Variable Energy Cyclotron Centre India
  • Alikhanov Institute for Theoretical and Experimental Physics
  • Moscow Engineering Physics Institute
  • Kent State University
  • Fudan University
  • Abilene Christian University
  • Universidad de Tarapacá
  • Shandong University
  • Indian Institute of Science Education and Research, Berhampur
  • University of California at Riverside
  • Indian Institute of Science Education and Research, Tirupati
  • University of Jammu
  • Stony Brook University
  • Ohio State University
  • University of Houston
  • Chinese Academy of Sciences
  • Yale University
  • University of California at Davis
  • Lawrence Berkeley National Laboratory
  • Purdue University
  • Indiana University Bloomington
  • National Institute of Technology, Durgapur
  • Guangxi Normal University
  • Tsinghua University
  • University of California at Los Angeles
  • Brookhaven National Laboratory
  • University of California at Berkeley
  • Eötvös Loránd University
  • University of Illinois at Chicago
  • Heidelberg University 
  • Institute for High Energy Physics
  • American University in Cairo
  • Rice University
  • University of Tsukuba
  • Central China Normal University
  • University of Kentucky
  • University of Calabria
  • Southern Connecticut State University
  • CAS - Institute of Modern Physics
  • Valparaiso University
  • Huzhou University
  • University of Chinese Academy of Sciences
  • Academia Sinica Taiwan HQ
  • National Cheng Kung University
  • University of Science and Technology of China
  • Wayne State University
  • Lehigh University
  • Wuhan University of Science and Technology
  • South China Normal University
  • Texas Southern University
  • National Institute of Science Education and Research
  • Temple University
  • Sejong University
  • Warsaw University of Technology
  • Rutgers - The State University of New Jersey, New Brunswick
  • University of Texas at Austin
  • Max Planck Institute for Physics (Werner Heisenberg Institute)
  • Creighton University
  • Indian Institute of Technology Patna
  • Ball State University
  • Michigan State University
  • Argonne National Laboratory
  • Chongqing University
  • Lanzhou University
  • Goethe University Frankfurt

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The polarization of Λ , Λ ¯ , Ξ − , and Ξ ¯ + hyperons along the angular momentum of the system has been measured in isobar collisions of Ru+Ru and Zr+Zr at s N N = 200 GeV with the STAR detector at RHIC. The polarization dependence on collision centrality exhibits an increasing trend in more peripheral collisions. Λ and Λ ¯ polarization dependence on the transverse momentum and pseudorapidity have been investigated, but no significant dependence was observed. The polarizations of Λ and Λ ¯ 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 2.4 σ significance in 20–50 % centrality. The Ξ hyperon polarization measurements via polarization transfer analysis yield finite positive values with 2.9 σ significance in 20–50 % centrality, slightly larger compared to the inclusive Λ polarization.

Original languageEnglish
Article number139891
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume870
DOIs
StatePublished - Nov 2025

Keywords

  • Global polarization
  • Hyperon
  • Vorticity

Fingerprint

Dive into the research topics of 'Hyperon global polarization in isobar Ru+Ru and Zr+Zr collisions at sNN=200GeV'. Together they form a unique fingerprint.

Cite this