{"paper":{"title":"Measurement of transverse polarization of $\\Lambda$ and $\\bar{\\Lambda}$ hyperons inside jets in $pp$ collisions at $\\sqrt{s}=200$ GeV","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. A. Derevschikov, A. Aitbayev, A. A. Korobitsin, A. Aparin, A. Bhasin, A. Chatterjee, A. C. Tamis, A. Das, A. Deshpande, A. Dhamija, A. Dimri, A. Gibson, A. Giri, A. G. Knospe, A. Gu, A. Gupta, A. Hamed, A. H. Tang, A. I. Sheikh, A. Jalotra, A. K. Alshammri, A. Kechechyan, A. Khanal, A. Kiselev, A. K. Pandey, A. K. Sahoo, A. Lebedev, A. N. Vasiliev, A. Ogawa, A. Pandav, A. Panday, A. Paul, A. Povarov, A. Rana, A. R. Kanuganti, A. S. Nain, A. Taranenko, A. Timofeev, A. V. Brandin, A. Yu. Kraeva, B. C. Schaefer, B. Fan, B. Fu, B. Korodi, B. Maghoul, B. Mohanty, B. Mondal, B. S. Page, B. Surrow, B. Xi, C. Broodo, C. Fu, C. Hu, C. Jena, C. Jin, C. J. Naim, C. Larson, C. Li, C. Liu, C. Perkins, C. P. Wong, C. W. Robertson, C. Yang, C. Y. Tsang, C. Zhang, C. Zhu, D. A. Morozov, D. Cebra, D. Chen, D. De Souza Lemos, D. Grosnick, D. G. Underwood, D. Kalinkin, D. Kapukchyan, D. Keane, D. Li, D. N. Svirida, D. Roy, D. Shen, D. Tl usty, D. Torres-Valladares, D. T. Samuel, D. Y. Shen, D. Zhang, E. Alpatov, E. Duckworth, E. Finch, E. G. Judd, E. M. Loyd, E. Nedorezov, E. Pottebaum, E. Samigullin, E. Shahaliev, E. Shulga, F. A. Flor, F. Geurts, F. S i, F. Videb{\\ae}k, F. Wang, F. Zhao, G. Agakishiev, G. Dale-Gau, G. D. Westfall, G. Eppley, G. Garcia, G. Liu, G. Nigmatkulov, G. Odyniec, G. S. Averichev, G. Van Buren, G. Wang, G. Wilks, G. Xie, G. Yan, H. Caines, H. Feng, H. Harrison-Smith, H. Huang, H. J. Crawford, H. Li, H. Liu, H. Nasrulloh, H. Qiu, H. Sako, H-S. Li, H. Wieman, H. Xu, H. Z. Huang, I. Aggarwal, I. Alekseev, I. Chakaberia, I. D. Ponce Pinto, I. G. Bordyuzhin, I. M. Deppner, I. Mooney, J. Adam, J. Atchison, J. C. Dunlop, J. Ceska, J. Cheng, J. C. Webb, J. D. Brandenburg, J. D. Nam, J. Engelage, J. E. Tyler, J. Gu, J. Han, J. H. Chen, J. H. Lee, J. H. Thomas, J. Jia, J. Kang, J. Kim, J. K. Sandhu, J. L. Drachenberg, J. Luo, J. M. Landgraf, J. M. Nelson, J. Putschke, J. Seger, J. Singh, J. S. Wang, J. Wang, J. W. Harris, J. Wu, J. Zhang, J. Zhao, K. Barish, K. Gopal, K. Kang, K. Kauder, K. Menduli, K. Mi, K. Okubo, K. Shen, K. Wang, K. Zhang, L. B. Havener, L. Chen, L. Kochenda, L. Kumar, L. Liu, L. Ma, L. Ruan, L. V. Nogach, L. Yi, L. Zhang, M. A. Rosales Aguilar, M. Calder\\'on de la Barca S\\'anchez, M. C. Labonte, M. D. Harasty, M. Gor don, M. I. Nagy, M. Isshiki, M. J. Skoby, M. Kesler, M. M. Aggarwal, M. M. Mondal, M. Nasim, M. Nie, M. Pal, M. Posik, M. Sharma, M. Strikhanov, M. V. Tokarev, M. Zurek, M. Zyzak, N. G. Minaev, N. Jindal, N. K. Pruthi, N. Magdy, N. R. Sahoo, N. Schmitz, N. Shah, N. Sharma, N. Xu, O. D. Tsai, O. Evdokimov, O. Eyser, O. Lomicky, O. M atonoha, O. V. Rogachevsky, P. Barik, P. Bhaga t, P. C. Weidenkaff, P. Dixit, P. Kravtsov, P. Parfenov, P. Seyboth, P. Sinha, P. V. Shanmuganathan, Q. Chen, Q. Hu, Q. H. Xu, Q. Yang, R. Fatemi, R. J. Hamilton, R. Lacey, R. Lednicky, R. L. Ray, R. Ma, R. Manikandhan, R. Seto, R. Sharma, S. Aslam, S. A. Voloshin, S. Behera, S. Bhatta, S. Corey, S. Esumi, S. Fazio, Shilpa, S. Kabana, S. K. Radhakrishnan, S. L. Huang, S. Oh, S. Pal, S. Paul, S. Ping, S. Prodhan, S. R. Sharma, S. Salur, S. Sato, S. Shi, S. Singha, S. S. Sambyal, STAR Collaboration: B. E. Aboona, S. Trentalange, S. Vokal, S. W. Wissink, S. Yang, S. Zhang, S. Zhou, T. D. S. Stanislaus, T. Fu, T. Gao, T. G. Dedovich, T. Huang, T. Lin, T. Ljubicic, T. L. Protzman, T. Lu, T. Niida, T. Nonaka, T. Pani, T. Shao, T. Tarnowsky, T. Ullrich, V. A. Okorokov, V. Bairathi, V. B. Luong, W. Chen, W. Christie, W. Li, W. W. Jacobs, W. Xie, W. Yuan, W. Zha, W. Zhang, X. Bao, X. Chu, X. Dong, X. F. Luo, X. Gou, X. Han, X. H. He, X. Jiang, X. Ju, X. Li, X. Liang, X. Sun, X. W ang, X. Wu, X. Xu, X. Z. Cai, X. Zhang, X. Zhu, Y. Cheng, Y. Fang, Y. Feng, Y. Fisyak, Y. Gao, Y. G. Ma, Y. He, Y. H. Leung, Y. Hu, Y. Huan g, Y. Huang, Y. Ji, Y. Jin, Y. Kong, Y. Li, Y. Lin, Y. Panebratsev, Y. Qi, Y. S. Chang, Y. S. El-Feky, Y. Shi, Y. S\\\"ohngen, Y. Song, Y. Su, Y. Sun, Y. Wang, Y. Xiao, Y. Xu, Y. Yang, Y. Yu, Y. Zhang, Y. Zhou, Z. Ahammed, Z. Chang, Z. Chen, Z. G. Xiao, Z. Li, Z. Liu, Z. Qin, Z. Tang, Z. Tu, Z. Wang, Z. W. Sweger, Z. Xu, Z. Yan, Z. Ye, Z. Zhan g, Z. Zhang","submitted_at":"2025-09-22T08:18:57Z","abstract_excerpt":"A surprisingly large transverse polarization of $\\Lambda$ 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 $\\Lambda$ 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 mome"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.17487","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}