Measurement of transverse single-spin asymmetries for dijet production in proton-proton collisions at √s=200 GeV

被引:51
作者
Abelev, B. I. [1 ]
Aggarwal, M. M.
Ahammed, Z.
Anderson, B. D.
Arkhipkin, D.
Averichev, G. S.
Bai, Y.
Balewski, J.
Barannikova, O.
Barnby, L. S.
Baudot, J.
Baumgart, S.
Belaga, V. V.
Bellingeri-Laurikainen, A.
Bellwied, R.
Benedosso, F.
Betts, R. R.
Bhardwaj, S.
Bhasin, A.
Bhati, A. K.
Bichsel, H.
Bielcik, J.
Bielcikova, J.
Bland, L. C.
Blyth, S.-L.
Bombara, M.
Bonner, B. E.
Botje, M.
Bouchet, J.
Brandin, A. V.
Burton, T. P.
Bystersky, M.
Cai, X. Z.
Caines, H.
Sanchez, M. Calderon de la Barca
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.
Christie, W.
Chung, S. U.
机构
[1] Univ Illinois, Chicago, IL 60607 USA
[2] Argonne Natl Lab, Argonne, IL 60439 USA
[3] Univ Birmingham, Birmingham, W Midlands, England
[4] Brookhaven Natl Lab, Upton, NY 11973 USA
[5] CALTECH, Pasadena, CA 91125 USA
[6] Univ Calif Davis, Davis, CA 95616 USA
[7] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[8] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA
[9] Creighton Univ, Omaha, NE 68178 USA
[10] Acad Sci Czech Republ, Inst Phys Nucl, Prague 25068, Czech Republic
[11] Joint Inst Nucl Res Dubna, Lab High Energy, Dubna, Russia
[12] Joint Inst Nucl Res Dubna, Particle Phys Lab, Dubna, Russia
[13] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany
[14] Inst Phys, Bhubaneswar 751005, Orissa, India
[15] Indian Inst Technol, Bombay 400076, Maharashtra, India
[16] Indiana Univ, Bloomington, IN 47408 USA
[17] Inst Rech Subatom, Strasbourg, France
[18] Univ Jammu, Jammu 180001, India
[19] Kent State Univ, Kent, OH 44242 USA
[20] Inst Modern Phys, Lanzhou, Peoples R China
[21] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA
[22] MIT, Cambridge, MA 02139 USA
[23] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany
[24] Michigan State Univ, E Lansing, MI 48824 USA
[25] Moscow Phys Engn Inst, Moscow, Russia
[26] CUNY City Coll, New York, NY 10031 USA
[27] Univ Utrecht, Amsterdam, Netherlands
[28] NIKHEF H, NL-1009 DB Amsterdam, Netherlands
[29] Ohio State Univ, Columbus, OH 43210 USA
[30] Panjab Univ, Chandigarh 160014, India
[31] Penn State Univ, University Pk, PA 16802 USA
[32] Inst High Energy Phys, Protvino, Russia
[33] Purdue Univ, W Lafayette, IN 47907 USA
[34] Pusan Natl Univ, Pusan 609735, South Korea
[35] Univ Rajasthan, Jaipur 302004, Rajasthan, India
[36] Rice Univ, Houston, TX 77251 USA
[37] Univ Sao Paulo, Sao Paulo, Brazil
[38] Univ Sci & Technol China, Anhua 230026, Peoples R China
[39] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
[40] SUBATECH, Nantes, France
[41] Texas A&M Univ, College Stn, TX 77843 USA
[42] Univ Texas, Austin, TX 78712 USA
[43] Tsinghua Univ, Beijing 100084, Peoples R China
[44] Valparaiso Univ, Valparaiso, IN 46383 USA
[45] Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India
[46] Warsaw Univ Technol, Warsaw, Poland
[47] Univ Washington, Seattle, WA 98195 USA
[48] Wayne State Univ, Detroit, MI 48201 USA
[49] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China
[50] Yale Univ, New Haven, CT 06520 USA
关键词
D O I
10.1103/PhysRevLett.99.142003
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report the first measurement of the opening angle distribution between pairs of jets produced in high-energy collisions of transversely polarized protons. The measurement probes (Sivers) correlations between the transverse spin orientation of a proton and the transverse momentum directions of its partons. With both beams polarized, the wide pseudorapidity (-1 <=eta <=+2) coverage for jets permits separation of Sivers functions for the valence and sea regions. The resulting asymmetries are all consistent with zero and considerably smaller than Sivers effects observed in semi-inclusive deep inelastic scattering. We discuss theoretical attempts to reconcile the new results with the sizable transverse spin effects seen in semi-inclusive deep inelastic scattering and forward hadron production in pp collisions.
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页数:6
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