Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at s = 500 GeV

L. AdamczyK, J. R. Adams, J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, N. N. Ajitanand, I. Alekseev, D. M. Anderson, R. Aoyama, A. Aparin, D. Arkhipkin, E. C. Aschenauer, M. U. Ashraf, A. Attri, G. S. Averichev, X. Bai, V. Bairathi, K. Barish, A. BeheraR. Bellwied, A. Bhasin, A. K. Bhati, P. Bhattarai, J. BielciK, J. Bielcikova, L. C. Bland, I. G. Bordyuzhin, J. Bouchet, J. D. Brandenburg, A. V. Brandin, D. Brown, J. Bryslawskyj, I. Bunzarov, J. Butterworth, H. Caines, M. Calderón De La Barca Sánchez, J. M. Campbell, D. Cebra, I. Chakaberia, P. Chaloupka, Z. Chang, N. Chankova-Bunzarova, A. Chatterjee, S. Chattopadhyay, X. Chen, X. Chen, J. H. Chen, J. Cheng, M. Cherney, W. Christie, G. Contin, H. J. Crawford, S. Das, T. G. Dedovich, J. Deng, I. M. Deppner, A. A. Derevschikov, L. Didenko, C. Dilks, X. Dong, J. L. Drachenberg, J. E. Draper, J. C. Dunlop, L. G. Efimov, N. Elsey, J. Engelage, G. Eppley, R. Esha, S. Esumi, O. Evdokimov, J. Ewigleben, O. Eyser, R. Fatemi, S. Fazio, P. Federic, P. Federicova, J. Fedorisin, Z. Feng, P. Filip, E. Finch, Y. FisyaK, C. E. Flores, J. Fujita, L. FuleK, C. A. Gagliardi, F. Geurts, A. Gibson, M. Girard, D. GrosnicK, D. S. Gunarathne, Y. Guo, A. Gupta, W. Guryn, A. I. Hamad, A. Hamed, A. Harlenderova, J. W. Harris, L. He, S. Heppelmann, S. Heppelmann, N. Herrmann, A. Hirsch, S. Horvat, B. Huang, T. Huang, X. Huang, H. Z. Huang, T. J. Humanic, P. Huo, G. Igo, W. W. Jacobs, A. Jentsch, J. Jia, K. Jiang, S. Jowzaee, E. G. Judd, S. Kabana, D. Kalinkin, K. Kang, D. Kapukchyan, K. Kauder, H. W. Ke, D. Keane, A. Kechechyan, Z. Khan, D. P. Kikoła, C. Kim, I. Kisel, A. Kisiel, L. Kochenda, M. KocmaneK, T. Kollegger, L. K. Kosarzewski, A. F. Kraishan, L. Krauth, P. Kravtsov, K. Krueger, N. Kulathunga, L. Kumar, J. Kvapil, J. H. Kwasizur, R. Lacey, J. M. Landgraf, K. D. Landry, J. Lauret, A. Lebedev, R. Lednicky, J. H. Lee, X. Li, W. Li, Y. Li, C. Li, J. Lidrych, T. Lin, M. A. Lisa, F. Liu, P. Liu, Y. Liu, H. Liu, T. Ljubicic, W. J. Llope, M. Lomnitz, R. S. Longacre, X. Luo, S. Luo, G. L. Ma, L. Ma, R. Ma, Y. G. Ma, N. Magdy, R. Majka, D. MallicK, S. Margetis, C. Markert, H. S. Matis, D. Mayes, K. Meehan, J. C. Mei, Z. W. Miller, N. G. Minaev, S. Mioduszewski, D. Mishra, S. Mizuno, B. Mohanty, M. M. Mondal, D. A. Morozov, M. K. Mustafa, Md Nasim, T. K. NayaK, J. M. Nelson, D. B. Nemes, M. Nie, G. Nigmatkulov, T. Niida, L. V. Nogach, T. Nonaka, S. B. Nurushev, G. Odyniec, A. Ogawa, K. Oh, V. A. Okorokov, D. Olvitt, B. S. Page, R. PaK, Y. Pandit, Y. Panebratsev, B. PawliK, H. Pei, C. Perkins, J. Pluta, K. Poniatowska, J. Porter, M. PosiK, N. K. Pruthi, M. Przybycien, J. Putschke, A. Quintero, S. Ramachandran, R. L. Ray, R. Reed, M. J. Rehbein, H. G. Ritter, J. B. Roberts, O. V. Rogachevskiy, J. L. Romero, J. D. Roth, L. Ruan, J. RusnaK, O. Rusnakova, N. R. Sahoo, P. K. Sahu, S. Salur, J. Sandweiss, M. Saur, J. Schambach, A. M. Schmah, W. B. Schmidke, N. Schmitz, B. R. Schweid, J. Seger, M. Sergeeva, R. Seto, P. Seyboth, N. Shah, E. Shahaliev, P. V. Shanmuganathan, M. Shao, W. Q. Shen, S. S. Shi, Z. Shi, Q. Y. Shou, E. P. Sichtermann, R. Sikora, M. Simko, S. Singha, M. J. Skoby, N. Smirnov, D. Smirnov, W. Solyst, P. Sorensen, H. M. Spinka, B. Srivastava, T. D.S. Stanislaus, D. J. Stewart, M. Strikhanov, B. Stringfellow, A. A.P. Suaide, T. Sugiura, M. Sumbera, B. Summa, Y. Sun, X. Sun, X. M. Sun, B. Surrow, D. N. Svirida, A. H. Tang, Z. Tang, A. Taranenko, T. Tarnowsky, A. TawfiK, J. Thäder, J. H. Thomas, A. R. Timmins, D. Tlusty, T. Todoroki, M. Tokarev, S. Trentalange, R. E. Tribble, P. Tribedy, S. K. Tripathy, B. A. TrzeciaK, O. D. Tsai, T. Ullrich, D. G. Underwood, I. Upsal, G. Van Buren, G. Van Nieuwenhuizen, A. N. Vasiliev, F. VidebæK, S. Vokal, S. A. Voloshin, A. Vossen, G. Wang, Y. Wang, F. Wang, Y. Wang, G. Webb, J. C. Webb, L. Wen, G. D. Westfall, H. Wieman, S. W. WissinK, R. Witt, Y. Wu, Z. G. Xiao, G. Xie, W. Xie, Y. F. Xu, J. Xu, Q. H. Xu, N. Xu, Z. Xu, S. Yang, Y. Yang, C. Yang, Q. Yang, Z. Ye, Z. Ye, L. Yi, K. Yip, I. K. Yoo, N. Yu, H. ZbroszczyK, W. Zha, Z. Zhang, J. Zhang, S. Zhang, S. Zhang, J. Zhang, Y. Zhang, X. P. Zhang, J. B. Zhang, J. Zhao, C. Zhong, L. Zhou, C. Zhou, X. Zhu, Z. Zhu, M. ZyzaK

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33 Scopus citations

Abstract

We report the first measurements of transverse single-spin asymmetries for inclusive jet and jet+π± production at midrapidity from transversely polarized proton-proton collisions at s=500 GeV. The data were collected in 2011 with the STAR detector sampled from 23 pb-1 integrated luminosity with an average beam polarization of 53%. Asymmetries are reported for jets with transverse momenta 6<pT<55 GeV/c and pseudorapidity |η|<1. Presented are measurements of the inclusive-jet azimuthal transverse single-spin asymmetry, sensitive to twist-3 initial-state quark-gluon correlators; the Collins asymmetry, sensitive to quark transversity coupled to the polarized Collins fragmentation function; and the first measurement of the "Collins-like" asymmetry, sensitive to linearly polarized gluons. Within the present statistical precision, inclusive-jet and Collins-like asymmetries are small, with the latter allowing the first experimental constraints on gluon linear polarization in a polarized proton. At higher values of jet transverse momenta, we observe the first nonzero Collins asymmetries in polarized-proton collisions, with a statistical significance of greater than 5σ. The results span a range of x similar to results from semi-inclusive deep-inelastic scattering but at much higher Q2. The Collins results enable tests of universality and factorization breaking in the transverse momentum-dependent formulation of perturbative quantum chromodynamics.

Original languageEnglish
Article number032004
JournalPhysical Review D
Volume97
Issue number3
DOIs
StatePublished - Feb 1 2018
Externally publishedYes

Funding

We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. 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, National Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the National Research Foundation of Korea, GA, and MSMT 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, National Research Foundation, 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. The authors thank Zhong-Bo Kang, Alexei Prokudin, Umberto D’Alesio, and Cristian Pisano for valuable discussions and providing the results of their model calculations. We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. 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, National Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the National Research Foundation of Korea, GA, and MSMT 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, National Research Foundation, 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.

FundersFunder number
RosAtom of Russia and German Bundesministerium fur Bildung, Wissenschaft, Forschung and Technologie
National Science Foundation1613939
U.S. Department of Energy
Office of Science
Nuclear Physics
Brookhaven National Laboratory
National Research Foundation
National Research Foundation
Department of Science and Technology, Ministry of Science and Technology, India
National Natural Science Foundation of China
Ministerstvo Školství, Mládeže a Tělovýchovy
Ministry of Education of the People's Republic of China
Bundesministerium für Bildung und Forschung
Chinese Academy of Sciences
Ministry of Science and Technology of the People's Republic of China
Ministarstvo Obrazovanja, Znanosti i Sporta
Ministry of Education and Science of the Russian Federation
National Research Foundation of Korea
Narodowe Centrum Nauki
Helmholtz Association

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