Transverse Spin Transfer to Λ and Λ¯ Hyperons in Polarized Proton-Proton Collisions at √s = 200 GeV

Authors

• J. Adam, Creighton University
• L. Adamczyk, AGH University of Science and Technology, Poland
• James K. Adkins, University of KentuckyFollow
• G. Agakishiev, Joint Institute for Nuclear Research, Russia
• M. M. Aggarwal, Panjab University, India
• Z. Ahammed, Variable Energy Cyclotron Centre, India
• I. Alekseev, Alikhanov Institute for Theoretical and Experimental Physics, Russia
• D. M. Anderson, Texas A & M University
• R. Aoyama, University of Tsukuba, Japan
• A. Aparin, Joint Institute for Nuclear Research, Russia
• D. Arkhipkin, Brookhaven National Laboratory
• E. C. Aschenauer, Brookhaven National Laboratory
• M. U. Ashraf, Tsinghua University, China
• F. Atetalla, Kent State University
• A. Attri, Panjab University, India
• G. S. Averichev, Joint Institute for Nuclear Research, Russia
• X. Bai, Central China Normal University, China
• V. Bairathi, National Institute of Science Education and Research, India
• K. Barish, University of California - Riverside
• A. J. Bassill, University of California - Riverside
• A. Behera, State University of New York - Stony Brook
• R. Bellwied, University of Houston
• A. Bhasin, University of Jammu, India
• A. K. Bhati, Panjab University, India
• J. Bielcik, Czech Technical University in Prague, Czech Republic
• J. Bielcikova, Nuclear Physics Institute AS CR, Czech Republic
• L. C. Bland, Brookhaven National Laboratory
• I. G. Bordyuzhin, Alikhanov Institute for Theoretical and Experimental Physics, Russia
• J. D. Brandenburg, Rice University
• A. V. Brandin, National Research Nuclear Univeristy MEPhI, Russia
• Renee H. Fatemi, University of KentuckyFollow
• Suvarna Ramachandran, University of KentuckyFollow

Abstract

The transverse spin transfer from polarized protons to Λ and Λ¯ hyperons is expected to provide sensitivity to the transversity distribution of the nucleon and to the transversely polarized fragmentation functions. We report the first measurement of the transverse spin transfer to Λ and Λ¯ along the polarization direction of the fragmenting quark, D_TT, in transversely polarized proton-proton collisions at √s = 200  GeV with the STAR detector at RHIC. The data correspond to an integrated luminosity of 18  pb⁻¹ and cover the pseudorapidity range |η| < 1.2 and transverse momenta p_T up to 8  GeV/c. The dependence on p_T and η are presented. The D_TT results are found to be comparable with a model prediction and are also consistent with zero within uncertainties.

Document Type

Article

Publication Date

11-29-2018

Notes/Citation Information

Published in Physical Review D, v. 98, issue 9, 091103, p. 1-8.

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Due to the large number of authors, only the first 30 and the authors affiliated with the University of Kentucky are listed in the author section above. For the complete list of authors, please download this article or visit: https://doi.org/10.1103/PhysRevD.98.091103

This group of authors is collectively known as the STAR Collaboration.

Digital Object Identifier (DOI)

https://doi.org/10.1103/PhysRevD.98.091103

Funding Information

Funded by SCOAP³.

This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S.National Science Foundation, the Ministry of Education and Science of the Russian Federation, Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China, the Major State Basic Research Development Program in China(No. 2014CB845406) and the Chinese Ministry of Education, the National Research Foundation of Korea,Czech Science Foundation and Ministry of Education,Youth and Sports of the Czech Republic, Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, RosAtom of Russia and German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie (BMBF) and the Helmholtz Association.

Repository Citation

Adam, J.; Adamczyk, L.; Adkins, James K.; Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alekseev, I.; Anderson, D. M.; Aoyama, R.; Aparin, A.; Arkhipkin, D.; Aschenauer, E. C.; Ashraf, M. U.; Atetalla, F.; Attri, A.; Averichev, G. S.; Bai, X.; Bairathi, V.; Barish, K.; Bassill, A. J.; Behera, A.; Bellwied, R.; Bhasin, A.; Bhati, A. K.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bordyuzhin, I. G.; Brandenburg, J. D.; Brandin, A. V.; Fatemi, Renee H.; and Ramachandran, Suvarna, "Transverse Spin Transfer to Λ and Λ¯ Hyperons in Polarized Proton-Proton Collisions at √s = 200 GeV" (2018). Physics and Astronomy Faculty Publications. 632.
https://uknowledge.uky.edu/physastron_facpub/632