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Published November 28, 2008 | Published
Journal Article Open

Forward Neutral-Pion Transverse Single-Spin Asymmetries in p+p Collisions at √s =200 Ge V

Abelev, B. I.
Aggarwal, M. M.
Ahammed, Z.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Bai, Y.
Balewski, J.
Barannikova, O.
Barnby, L. S. ORCID icon
Baudot, J.
Baumgart, S.
Beavis, D. R.
Bellwied, R.
Benedosso, F.
Betts, R. R.
Bhardwaj, S. ORCID icon
Bhasin, A. ORCID icon
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Blyth, S-L.
Bombara, M.
Bonner, B. E.
Botje, M.
Bouchet, J.
Braidot, E.
Brandin, A. V.
Bueltmann, S.
Burton, T. P.
Bystersky, M.
Cai, X. Z.
Caines, H.
Calderόn de la Barca Sánchez, M.
Callner, J.
Catu, O.
Cebra, D.
Cervantes, M. C.
Chajecki, Z.
Chaloupka, P.
Chattopadhyay, S.
Chen, H. F.
Chen, J. H.
Chen, J. Y.
Cheng, J.
Cherney, M.
Chikanian, A.
Choi, K. E.
Christie, W.
Chung, S. U.
Clarke, R. F.
Codrington, M. J. M.
Coffin, J. P.
Cormier, T. M.
Cosentino, M. R.
Cramer, J. G.
Crawford, H. J.
Das, D.
Dash, S.
Daugherity, M.
de-Moura, M. M.
Dedovich, T. G.
DePhillips, M.
Derevschikov, A. A.
Derradi-de-Souza, R. ORCID icon
Didenko, L.
Dietel, T.
Djawotho, P.
Dogra, S. M.
Dong, X.
Drachenberg, J. L.
Draper, J. E.
Du, F.
Dunlop, J. C.
Dutta-Mazumdar, M. R.
Edwards, W. R.
Efimov, L. G.
Elhalhuli, E.
Emelianov, V.
Engelage, J.
Eppley, G.
Erazmus, B.
Estienne, M.
Eun, L.
Fachini, P.
Fatemi, R. ORCID icon
Fedorisin, J.
Feng, A.
Filip, P.
Finch, E. ORCID icon
Fine, V.
Fisyak, Y. ORCID icon
Fu, J.
Gagliardi, C. A.
Gaillard, L.
Ganti, M. S.
Garcia-Solis, E.
Ghazikhanian, V.
Ghosh, P.
Gorbunov, Y. N.
Gordon, A.
Gos, H.
Grebenyuk, O.
Grosnick, D.
Grube, B. ORCID icon
Guertin, S. M.
Guimaraes, K. S. F. F. ORCID icon
Gupta, A.
Gupta, N.
Guryn, W.
Haag, B.
Hallman, T. J.
Hamed, A.
Harris, J. W. ORCID icon
He, W.
Heinz, M.
Henry, T. W.
Heppelmann, S.
Hippolyte, B.
Hirsch, A.
Hjort, E.
Hoffman, A. M.
Hoffmann, G. W.
Hofman, D. J.
Hollis, R. S.
Horner, M. J.
Huang, H. Z.
Hughes, E. W.
Humanic, T. J.
Igo, G.
Iordanova, A.
Jacobs, P.
Jacobs, W. W.
Jakl, P.
Jin, F.
Jones, P. G.
Judd, E. G.
Kabana, S.
Kajimoto, K.
Kang, K.
Kapitan, J.
Kaplan, M.
Keane, D.
Kechechyan, A.
Kettler, D.
Khodyrev, V. Yu.
Kiryluk, J.
Kisiel, A. ORCID icon
Klein, S. R. ORCID icon
Knospe, A. G.
Kocoloski, A.
Koetke, D. D.
Kollegger, T.
Kopytine, M.
Kotchenda, L.
Kouchpil, V.
Kowalik, K. L.
Kravtsov, P.
Kravtsov, V. I.
Krueger, K.
Kuhn, C.
Kumar, A.
Kurnadi, P.
Lamont, M. A. C.
Landgraf, J. M.
Langdon, J.
Lange, S.
LaPointe, S.
Laue, F.
Lauret, J.
Lebedev, A.
Lednicky, R. ORCID icon
Lee, C-H.
LeVine, M. J.
Li, C.
Li, Q.
Li, Y.
Lin, G.
Lin, X.
Lindenbaum, S. J.
Lisa, M. A.
Liu, F.
Liu, H.
Liu, J.
Liu, L.
Ljubicic, T.
Llope, W. J.
Longacre, R. S.
Love, W. A.
Lu, Y.
Ludlam, T.
Lynn, D.
Ma, G. L.
Ma, J. G.
Ma, Y. G. ORCID icon
Mahapatra, D. P.
Majka, R.
Mangotra, L. K.
Manweiler, R.
Margetis, S.
Markert, C.
Matis, H. S.
Matulenko, Yu. A.
McShane, T. S.
Meschanin, A.
Millane, J.
Miller, C.
Miller, M. L.
Minaev, N. G. ORCID icon
Mioduszewski, S.
Mischke, A.
Mitchell, J.
Mohanty, B. ORCID icon
Morozov, D. A.
Munhoz, M. G. ORCID icon
Nandi, B. K.
Nattrass, C. ORCID icon
Nayak, T. K.
Nelson, J. M.
Nepali, C.
Netrakanti, P. K.
Ng, M. J.
Nogach, L. V.
Nurushev, S. B.
Odyniec, G.
Ogawa, A.
Okada, H.
Okorokov, V. ORCID icon
Olson, D.
Pachr, M.
Pal, S. K.
Panebratsev, Y.
Pavlinov, A. I.
Pawlak, T.
Peitzmann, T. ORCID icon
Perevoztchikov, V.
Perkins, C.
Peryt, W.
Phatak, S. C.
Planinic, M.
Pluta, J.
Poljak, N.
Porile, N.
Poskanzer, A. M.
Potekhin, M.
Potukuchi, B. V. K. S.
Prindle, D.
Pruneau, C.
Pruthi, N. K.
Putschke, J.
Qattan, I. A. ORCID icon
Rakness, G.
Raniwala, R.
Raniwala, S.
Ray, R. L.
Relyea, D.
Ridiger, A.
Ritter, H. G.
Roberts, J. B.
Rogachevskiy, O. V.
Romero, J. L.
Rose, A.
Roy, C.
Ruan, L.
Russcher, M. J.
Rykov, V.
Sahoo, R.
Sakrejda, I.
Sakuma, T.
Salur, S.
Sandweiss, J.
Sarsour, M.
Schambach, J.
Scharenberg, R. P.
Schmitz, N.
Seger, J.
Selyuzhenkov, I.
Seyboth, P.
Shabetai, A.
Shahaliev, E.
Shao, M.
Sharma, M.
Shi, X-H.
Sichtermann, E. P.
Simon, F. ORCID icon
Singaraju, R. N.
Skoby, M. J.
Smirnov, N.
Snellings, R. ORCID icon
Sorensen, P. ORCID icon
Sowinski, J.
Speltz, J.
Spinka, H. M.
Srivastava, B.
Stadnik, A.
Stanislaus, T. D. S.
Staszak, D.
Stock, R.
Strikhanov, M. ORCID icon
Stringfellow, B.
Suaide, A. A. P. ORCID icon
Suarez, M. C.
Subba, N. L.
Sumbera, M. ORCID icon
Sun, X. M.
Sun, Z.
Surrow, B.
Symons, T. J. M.
Szanto-de-Toledo, A.
Takahashi, J. ORCID icon
Tang, A. H.
Tang, Z.
Tarnowsky, T.
Tatarowicz, J
Thein, D.
Thomas, J. H. ORCID icon
Tian, J.
Timmins, A. R.
Timoshenko, S.
Tokarev, M.
Trainor, T. A.
Tram, V. N.
Trattner, A. L.
Trentalange, S.
Tribble, R. E.
Tsai, O. D.
Ulery, J.
Ullrich, T.
Underwood, D. G.
Van Buren, G.
van der Kolk, N. ORCID icon
van Leeuwen, M. ORCID icon
Vander Molen, A. M.
Varma, R.
Vasconcelos, G. M. S.
Vasilevski, I. M.
Vasiliev, A. N.
Vernet, R.
Videbaek, F.
Vigdor, S. E.
Viyogi, Y. P.
Vokal, S.
Voloshin, S. A.
Wada, M.
Waggoner, W. T.
Wang, F.
Wang, G.
Wang, J. S.
Wang, Q.
Wang, X.
Wang, X. L.
Wang, Y.
Webb, J. C.
Westfall, G. D.
Whitten, C., Jr.
Wieman, H.
Wissink, S. W.
Witt, R.
Wu, J.
Wu, Y.
Wu, N.
Xu, Q. H.
Xu, Z.
Yepes, P.
Yoo, I-K.
Yue, Q.
Zachariou, N. ORCID icon
Zawisza, M.
Zhan, W.
Zhang, H.
Zhang, S.
Zhang, W. M.
Zhang, Y. ORCID icon
Zhang, Z. P.
Zhao, Y.
Zhong, C.
Zhou, J.
Zoulkarneev, R.
Zoulkarneeva, Y.
Zuo, J. X.

Abstract

We report precision measurements of the Feynman x (x_F) dependence, and first measurements of the transverse momentum (p_T) dependence, of transverse single-spin asymmetries for the production of π^0 mesons from polarized proton collisions at √s =200 Ge V. The x_F dependence of the results is in fair agreement with perturbative QCD model calculations that identify orbital motion of quarks and gluons within the proton as the origin of the spin effects. Results for the p_T dependence at fixed x_F are not consistent with these same perturbative QCD-based calculations.

Additional Information

©2008 American Physical Society. Received 21 January 2008. Acknowledgements: We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center at LBNL and the resources provided by the Open Science Grid consortium for their support. This work was supported in part by the Offices of NP and HEP within the U.S. DOE Office of Science; the U.S. NSF; a sponsored research grant from Renaissance Technologies Corporation; the BMBF of Germany; CNRS/IN2P3, RA, RPL, and EMN of France; EPSRC of the United Kingdom; FAPESP of Brazil; the Russian Ministry of Science and Technology; the Ministry of Education and the NNSFC of China; IRP and GA of the Czech Republic, FOM of the Netherlands, DAE, DST, and CSIR of the Government of India; Swiss NSF; the Polish State Committee for Scientific Research; Slovak Research and Development Agency, and the Korea Science and Engineering Foundation.

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