Measurement of transverse polarization of Λ and $$\overline{\Lambda }$$ hyperons inside jets in unpolarized proton-proton collisions at $$\sqrt{s}=200$$ GeV
Year: 2026
Type: article
Abstract: A bstract A surprisingly large transverse polarization of Λ hyperons in unpolarized hadron-nucleon/nucleus collisions has been observed for 50 years, and the origin of this polarization remains an important open question. Recently, theoretical frameworks have advanced in describing this puzzle with the polarizing fragmentation function (PFF). We report the first measurement of Λ and $$\overline{\Lambda }$$ transverse polarization inside jets in unpolarized proton-proton collisions, which is directly attributed to the PFF. The polarization is measured as a function of the jet transverse momentum, the fraction of the jet momentum carried by $$\Lambda (\overline{\Lambda })$$ hyperons, and the transverse momentum of $$\Lambda (\overline{\Lambda })$$ hyperons relative to the jet axis. Covering a wide jet-energy range, these data provide the first constraints on the gluon PFF and allow tests of TMD evolution and its universality.
Source: Journal of High Energy Physics
Authors: 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. Calderon de la Barca Sanchez, D. Cebra, J. Ceska, I. Chakaberia, Y. S. Chang, Z. Chang, A. Chatterjee, D. Chen, J. H. Chen, L. Chen, Q. Chen, W. Chen, Z. Chen, J. Cheng, Y. Cheng, W. Christie, X. Chu, S. Corey, H. J. Crawford, G. Dale-Gau, A. Das, D. De Souza Lemos, 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, Y. Fang, R. Fatemi, S. Fazio, H. Feng, Y. Feng, E. Finch, Y. Fisyak, F. A. Flor, B. Fu, C. Fu, T. Fu, T. Gao, Y. Gao, G. Garcia, F. Geurts, A. Gibson, A. Giri, K. Gopal, M. Gordon, X. Gou, D. Grosnick, A. Gu, J. Gu, A. Gupta, 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, J. Kang, K. Kang, A. R. Kanuganti, D. Kapukchyan, K. Kauder, D. Keane, A. Kechechyan, M. Kesler, A. Khanal, A. Khanal, J. Kim, A. Kiselev, A. G. Knospe, L. Kochenda, Y. Kong, 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 Abdelwahab Abdelrahman, B. Maghoul, R. Manikandhan, O. Matonoha, K. Menduli, 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, M. Pal, S. Pal, A. Pandav, A. Panday, A. K. Pandey, Y. Panebratsev, T. Pani, P. Parfenov, A. Paul, S. Paul, C. Perkins, S. Ping, 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, S. K. Radhakrishnan, A. Rana, R. L. Ray, C. W. Robertson, O. V. Rogachevskiy, M. A. Rosales Aguilar, D. Roy, L. Ruan, A. K. Sahoo, N. R. Sahoo, H. Sako, S. Salur, S. S. Sambyal, E. Samigullin, D. T. Samuel, 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, Shilpa, E. Shulga, F. Si, J. Singh, S. Singha, P. Sinha, M. J. Skoby, Y. Soehngen, 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, O. D. Tsai, C. Y. Tsang, Z. Tu, J. E. Tyler, T. Ullrich, D. G. Underwood, G. Van Buren, A. N. Vasiliev, F. Videbaek, S. Vokal, S. A. Voloshin, F. Wang, G. Wang, G. Wang, J. Wang, J. S. Wang, K. Wang, X. Wang, Y. Wang, Y. Wang, Y. Wang, Z. 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, X. 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. Yuan, W. Zha, C. Zhang, D. Zhang, J. Zhang, K. Zhang, L. Zhang, S. Zhang, W. 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, C. Zhu, X. Zhu, M. Zurek, M. Zyzak
Institutions: Texas A&M University, Czech Technical University in Prague, Joint Institute for Nuclear Research, Panjab University, Variable Energy Cyclotron Centre, Kurchatov Institute, National Research Nuclear University MEPhI, Kent State University, Fudan University, Abilene Christian University, University of Tarapacá, Shandong University, Indian Institute of Science Education and Research, Bhopal, University of California System, Indian Institute of Science Education and Research, Tirupati, University of Jammu, State University of New York, The Ohio State University, University of Houston, Chinese Academy of Sciences, Yale University, Lawrence Berkeley National Laboratory, Purdue University West Lafayette, Indiana University, National Institute of Technology Durgapur, Central China Normal University, Guangxi Normal University, Tsinghua University, Brookhaven National Laboratory, Heidelberg University, American University in Cairo, Rice University, University of Tsukuba, University of Illinois Chicago, University of Kentucky, Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Cosenza, University of Calabria, Southern Connecticut State University, Valparaiso University, Huzhou Normal University, University of Chinese Academy of Sciences, Academia Sinica, National Cheng Kung University, Eötvös Loránd University, University of Science and Technology of China, Sejong University, Wayne State University, Temple University, Lehigh University, Wuhan University of Science and Technology, South China Normal University, Texas Southern University, National Institute of Science Education and Research, Lovely Professional University, Warsaw University of Technology, Rutgers, The State University of New Jersey, Max Planck Institute for Physics, Creighton University, Ball State University, Michigan State University, Argonne National Laboratory, Chongqing University, Lanzhou University, Frankfurt Institute for Advanced Studies
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: National Science Foundation, U.S. Department of Energy, National Energy Research Scientific Computing Center, National Research Foundation, Ministry of Education, Culture, Sports, Science and Technology, National Natural Science Foundation of China, Grantová Agentura České Republiky, Bundesministerium für Bildung und Forschung, National Research Foundation of Korea, Emberi Eroforrások Minisztériuma, Agencia Nacional de Investigación y Desarrollo, National Science and Technology Council, Office of Science, Japan Society for the Promotion of Science, National Research, Development and Innovation Office, Nuclear Physics, Lawrence Berkeley National Laboratory
OpenAlex ID: W4415254640