Longitudinal and transverse spin transfer to Λ and Λ ¯ hyperons in polarized p + p collisions at s = 200     GeV

Abdulhamid, M. I.; Aboona, B. E.; Adam, J.; Adamczyk, L.; Adams, J. R.; Aggarwal, I.; Aggarwal, M. M.; Ahammed, Z.; Anderson, D. M.; Aschenauer, E. C.; Aslam, S.; Atchison, J.; Bairathi, V.; Baker, W.; Ball Cap, J. G.; Barish, K.; Bellwied, R.; Bhagat, P.; Bhasin, A.; Bhatta, S.; Bielcik, J.; Bielcikova, J.; Brandenburg, J. D.; Cai, X. Z.; Caines, H.; Calderón de la Barca Sánchez, M.; Cebra, D.; Ceska, J.; Chakaberia, I.; Chaloupka, P.; Chan, B. K.; Chang, Z.; Chatterjee, A.; Chen, D.; Chen, J.; Chen, J. H.; Chen, Z.; Cheng, J.; Cheng, Y.; Choudhury, S.; Christie, W.; Chu, X.; Crawford, H. J.; Csanád, M.; Dale-Gau, G.; Das, A.; Daugherity, M.; Deppner, I. M.; Dhamija, A.; Di Carlo, L.; Dixit, P.; Dong, X.; Drachenberg, J. L.; Duckworth, E.; Dunlop, J. C.; Engelage, J.; Eppley, G.; Esumi, S.; Evdokimov, O.; Ewigleben, A.; Eyser, O.; Fatemi, R.; Fazio, S.; Feng, C. J.; Feng, Y.; Finch, E.; Fisyak, Y.; Flor, F. A.; Fu, C.; Gagliardi, C. A.; Galatyuk, T.; Gao, T.; Geurts, F.; Ghimire, N.; Gibson, A.; Gopal, K.; Gou, X.; Grosnick, D.; Gupta, A.; Guryn, W.; Hamed, A.; Han, Y.; Harabasz, S.; Harasty, M. D.; Harris, J. W.; Harrison-Smith, H.; He, W.; He, X. H.; He, Y.; Herrmann, N.; Holub, L.; Hu, C.; Hu, Q.; Hu, Y.; Huang, H.; Huang, H. Z.; Huang, S. L.; Huang, T.; Huang, X.; Huang, Y.; Huang, Y.; Humanic, T. J.; Isenhower, D.; Isshiki, M.; Jacobs, W. W.; Jalotra, A.; Jena, C.; Jentsch, A.; Ji, Y.; Jia, J.; Jin, C.; Ju, X.; Judd, E. G.; Kabana, S.; Kabir, M. L.; Kagamaster, S.; Kalinkin, D.; Kang, K.; Kapukchyan, D.; Kauder, K.; Keane, D.; Kelsey, M.; Khyzhniak, Y. V.; Kikoła, D. P.; Kimelman, B.; Kincses, D.; Kisel, I.; Kiselev, A.; Knospe, A. G.; Ko, H. S.; Kosarzewski, L. K.; Kramarik, L.; Kumar, L.; Kumar, S.; Kunnawalkam Elayavalli, R.; Lacey, R.; Landgraf, J. M.; Lauret, J.; Lebedev, A.; Lee, J. H.; Leung, Y. H.; Lewis, N.; Li, C.; Li, W.; Li, X.; Li, Y.; Li, Y.; Li, Z.; Liang, X.; Liang, Y.; Licenik, R.; Lin, T.; Lisa, M. A.; Liu, C.; Liu, F.; Liu, G.; Liu, H.; Liu, H.; Liu, L.; Liu, T.; Liu, X.; Liu, Y.; Liu, Z.; Ljubicic, T.; Llope, W. J.; Lomicky, O.; Longacre, R. S.; Loyd, E. M.; Lu, T.; Lukow, N. S.; Luo, X. F.; Ma, L.; Ma, R.; Ma, Y. G.; Magdy, N.; Mallick, D.; Margetis, S.; Markert, C.; Matis, H. S.; Mazer, J. A.; McNamara, G.; Mi, K.; Mioduszewski, S.; Mohanty, B.; Mondal, M. M.; Mooney, I.; Mukherjee, A.; Nagy, M. I.; Nain, A. S.; Nam, J. D.; Nasim, M.; Neff, D.; Nelson, J. M.; Nemes, D. B.; Nie, M.; Nigmatkulov, G.; Niida, T.; Nishitani, R.; Nonaka, T.; Odyniec, G.; Ogawa, A.; Oh, S.; Okubo, K.; Page, B. S.; Pak, R.; Pan, J.; Pandav, A.; Pandey, A. K.; Pani, T.; Paul, A.; Pawlik, B.; Pawlowska, D.; Perkins, C.; Pluta, J.; Pokhrel, B. R.; Posik, M.; Protzman, T.; Prozorova, V.; Pruthi, N. K.; Przybycien, M.; Putschke, J.; Qin, Z.; Qiu, H.; Quintero, A.; Racz, C.; Radhakrishnan, S. K.; Raha, N.; Rana, A.; Ray, R. L.; Reed, R.; Ritter, H. G.; Robertson, C. W.; Robotkova, M.; Rosales Aguilar, M. A.; Roy, D.; Roy Chowdhury, P.; Ruan, L.; Sahoo, A. K.; Sahoo, N. R.; Sako, H.; Salur, S.; Sato, S.; Schmidke, W. B.; Schmitz, N.; Seck, F-J.; Seger, J.; Seto, R.; Seyboth, P.; Shah, N.; Shanmuganathan, P. V.; Shao, T.; Sharma, M.; Sharma, N.; Sharma, R.; Sharma, S. R.; Sheikh, A. I.; Shen, D.; Shen, D. Y.; Shen, K.; Shi, S. S.; Shi, Y.; Shou, Q. Y.; Si, F.; Singh, J.; Singha, S.; Sinha, P.; Skoby, M. J.; Smirnov, N.; Söhngen, Y.; Song, Y.; Srivastava, B.; Stanislaus, T. D. S.; Stefaniak, M.; Stewart, D. J.; Stringfellow, B.; Su, Y.; Suaide, A. A. P.; Sumbera, M.; Sun, C.; Sun, X.; Sun, Y.; Sun, Y.; Surrow, B.; Sweger, Z. W.; Szymanski, P. R.; Tamis, A.; Tang, A. H.; Tang, Z.; Tarnowsky, T.; Thomas, J. H.; Timmins, A. R.; Tlusty, D.; Todoroki, T.; Tomkiel, C. A.; Trentalange, S.; Tribble, R. E.; Tribedy, P.; Truhlar, T.; Trzeciak, B. A.; Tsai, O. D.; Tsang, C. Y.; Tu, Z.; Tyler, J.; Ullrich, T.; Underwood, D. G.; Upsal, I.; Van Buren, G.; Vanek, J.; Vassiliev, I.; Verkest, V.; Videbæk, F.; Voloshin, S. A.; Wang, F.; Wang, G.; Wang, J. S.; Wang, J.; Wang, X.; Wang, Y.; Wang, Y.; Wang, Y.; Wang, Z.; Webb, J. C.; Weidenkaff, P. C.; Westfall, G. D.; Wielanek, D.; Wieman, H.; Wilks, G.; Wissink, S. W.; Witt, R.; Wu, J.; Wu, J.; Wu, X.; Wu, X.; Wu, Y.; Xi, B.; Xiao, Z. G.; Xie, G.; Xie, W.; Xu, H.; Xu, N.; Xu, Q. H.; Xu, Y.; Xu, Y.; Xu, Z.; Xu, Z.; Yan, G.; Yan, Z.; Yang, C.; Yang, Q.; Yang, S.; Yang, Y.; Ye, Z.; Ye, Z.; Yi, L.; Yip, K.; Yu, Y.; Zbroszczyk, H.; Zha, W.; Zhang, C.; Zhang, D.; Zhang, J.; Zhang, S.; Zhang, W.; Zhang, X.; Zhang, Y.; Zhang, Y.; Zhang, Y.; Zhang, Y.; Zhang, Z. J.; Zhang, Z.; Zhang, Z.; Zhao, F.; Zhao, J.; Zhao, M.; Zhou, C.; Zhou, J.; Zhou, S.; Zhou, Y.; Zhu, X.; Zurek, M.; Zyzak, M.

doi:10.1103/PhysRevD.109.012004

Longitudinal and transverse spin transfer to $Λ$ and $\bar{Λ}$ hyperons in polarized $p + p$ collisions at $\sqrt{s} = 200 GeV$

Journal Article · Thu Jan 04 23:00:00 EST 2024 · Physical Review. D.

DOI:https://doi.org/10.1103/PhysRevD.109.012004· OSTI ID:2278863

Abdulhamid, M. I.; Aboona, B. E.; Adam, J.; Adamczyk, L.; Adams, J. R.; Aggarwal, I.; Aggarwal, M. M.; Ahammed, Z.; Anderson, D. M.; Aschenauer, E. C.; Aslam, S.; Atchison, J.; Bairathi, V.; Baker, W.; Ball Cap, J. G.; Barish, K.; Bellwied, R.; Bhagat, P.; Bhasin, A.; Bhatta, S. more »

The longitudinal and transverse spin transfers to $Λ$ ( $\bar{Λ}$ ) hyperons in polarized proton-proton collisions are expected to be sensitive to the helicity and transversity distributions, respectively, of (anti)strange quarks in the proton, and to the corresponding polarized fragmentation functions. We report improved measurements of the longitudinal spin transfer coefficient, $D_{L L}$ , and the transverse spin transfer coefficient, $D_{T T}$ , to $Λ$ and $\bar{Λ}$ in polarized proton-proton collisions at $\sqrt{s} = 200 GeV$ by the STAR experiment at RHIC. The dataset includes longitudinally polarized proton-proton collisions with an integrated luminosity of $52 {pb}^{- 1}$ , and transversely polarized proton-proton collisions with a similar integrated luminosity. Both datasets have about twice the statistics of previous results and cover a kinematic range of $| η_{Λ (\bar{Λ})} | < 1.2$ and transverse momentum $p_{T, Λ (\bar{Λ})}$ up to $8 GeV / c$ . We also report the first measurements of the hyperon spin transfer coefficients $D_{L L}$ and $D_{T T}$ as a function of the fractional jet momentum $z$ carried by the hyperon, which can provide more direct constraints on the polarized fragmentation functions.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

OSTI ID:: 2278863

Alternate ID(s):: OSTI ID: 2340735
OSTI ID: 2282315

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 1 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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