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Measurement of Transverse Single-Spin Asymmetries for Di-Jet Production in Proton-Proton Collisions at $\sqrt{s} = 200$ GeV

B.I. Abelev M.M. Aggarwal Z. Ahammed B.D. Anderson D. Arkhipkin G.S. Averichev Y. Bai J. Balewski O. Barannikova L.S. Barnby J. Baudot 1 S. Baumgart V.V. Belaga A. Bellingeri-Laurikainen 2 R. Bellwied F. Benedosso R.R. Betts S. Bhardwaj A. Bhasin A.K. Bhati H. Bichsel J. Bielcik J. Bielcikova L.C. Bland S.-L. Blyth M. Bombara B.E. Bonner M. Botje J. Bouchet A.V. Brandin A. Bravar T.P. Burton M. Bystersky X.Z. Cai H. Caines M. Calderon de la Barca Sanchez J. Callner O. Catu D. Cebra Z. Chajecki P. Chaloupka S. Chattopadhyay H.F. Chen J.H. Chen J.Y. Chen J. Cheng M. Cherney A. Chikanian W. Christie S.U. Chung J.P. Coffin 1 T.M. Cormier M.R. Cosentino J.G. Cramer H.J. Crawford D. Das S. Dash M. Daugherity M.M. de Moura T.G. Dedovich M. Dephillips A.A. Derevschikov L. Didenko T. Dietel P. Djawotho S.M. Dogra X. Dong J.L. Drachenberg J.E. Draper F. Du V.B. Dunin J.C. Dunlop M.R. Dutta Mazumdar V. Eckardt W.R. Edwards L.G. Efimov V. Emelianov J. Engelage G. Eppley B. Erazmus 2 Magali Estienne 1 P. Fachini R. Fatemi J. Fedorisin A. Feng P. Filip E. Finch V. Fine Y. Fisyak J. Fu C.A. Gagliardi L. Gaillard M.S. Ganti E. Garcia-Solis V. Ghazikhanian P. Ghosh Y.G. Gorbunov H. Gos O. Grebenyuk D. Grosnick B. Grube S.M. Guertin K.S.F.F. Guimaraes N. Gupta B. Haag T.J. Hallman A. Hamed J.W. Harris W. He M. Heinz T.W. Henry S. Heppelmann B. Hippolyte 1 A. Hirsch E. Hjort A.M. Hoffman G.W. Hoffmann D.J. Hofman R.S. Hollis M.J. Horner H.Z. Huang E.W. Hughes T.J. Humanic G. Igo A. Iordanova P. Jacobs W.W. Jacobs P. Jakl F. Jia P.G. Jones E.G. Judd S. Kabana 2 K. Kang J. Kapitan M. Kaplan D. Keane A. Kechechyan D. Kettler V.Yu. Khodyrev J. Kiryluk A. Kisiel E.M. Kislov S.R. Klein A.G. Knospe A. Kocoloski D.D. Koetke T. Kollegger M. Kopytine L. Kotchenda V. Kouchpil K.L. Kowalik P. Kravtsov V.I. Kravtsov K. Krueger C. Kuhn 1 A.I. Kulikov A. Kumar P. Kurnadi A.A. Kuznetsov M.A.C. Lamont J.M. Landgraf S. Lange S. Lapointe F. Laue J. Lauret A. Lebedev R. Lednicky C.-H. Lee S. Lehocka M.J. Levine C. Li Q. Li Y. Li G. Lin X. Lin S.J. Lindenbaum M.A. Lisa F. Liu Hong Liu J. Liu L. Liu T. Ljubicic W.J. Llope R.S. Longacre W.A. Love Y. Lu T. Ludlam D. Lynn G.L. Ma J.G. Ma Y.G. Ma D.P. Mahapatra R. Majka L.K. Mangotra R. Manweiler S. Margetis C. Markert Lilian Martin 2 H.S. Matis Yu.A. Matulenko C.J. Mcclain T.S. Mcshane Yu. Melnick A. Meschanin J. Millane M.L. Miller N.G. Minaev S. Mioduszewski A. Mischke J. Mitchell B. Mohanty D.A. Morozov M.G. Munhoz B.K. Nandi C. Nattrass T.K. Nayak J.M. Nelson C. Nepali P.K. Netrakanti L.V. Nogach S.B. Nurushev G. Odyniec A. Ogawa V. Okorokov M. Oldenburg D. Olson M. Pachr S.K. Pal Y. Panebratsev A.I. Pavlinov T. Pawlak T. Peitzmann V. Perevoztchikov C. Perkins W. Peryt S.C. Phatak M. Planinic J. Pluta N. Poljak N. Porile A.M. Poskanzer M. Potekhin E. Potrebenikova B.V.K.S. Potukuchi D. Prindle C. Pruneau J. Putschke I.A. Qattan R. Raniwala S. Raniwala R.L. Ray D. Relyea A. Ridiger H.G. Ritter J.B. Roberts O.V. Rogachevskiy J.L. Romero A. Rose C. Roy 2 L. Ruan M.J. Russcher R. Sahoo I. Sakrejda T. Sakuma S. Salur J. Sandweiss M. Sarsour P.S. Sazhin J. Schambach R.P. Scharenberg N. Schmitz J. Seger I. Selyuzhenkov P. Seyboth Alexandre Shabetai 1 E. Shahaliev M. Shao M. Sharma W.Q. Shen S.S. Shimanskiy E.P. Sichtermann F. Simon R.N. Singaraju N. Smirnov R. Snellings P. Sorensen J. Sowinski J. Speltz 1 H.M. Spinka B. Srivastava A. Stadnik T.D.S. Stanislaus D. Staszak J. Stevens R. Stock M. Strikhanov B. Stringfellow A.A.P. Suaide M.C. Suarez N.L. Subba M. Sumbera X.M. Sun Z. Sun B. Surrow T.J.M. Symons A. Szanto de Toledo J. Takahashi A.H. Tang T. Tarnowsky J.H. Thomas A.R. Timmins S. Timoshenko M. Tokarev T.A. Trainor S. Trentalange R.E. Tribble O.D. Tsai J. Ulery T. Ullrich D.G. Underwood G. van Buren N. Van Der Kolk M. van Leeuwen A.M. Vander Molen R. Varma I.M. Vasilevski A.N. Vasiliev R. Vernet 1 S.E. Vigdor Y.P. Viyogi S. Vokal S.A. Voloshin M. Wada W.T. Waggoner F. Wang G. Wang J.S. Wang X.L. Wang Y. Wang J.C. Webb G.D. Westfall C. Whitten H. Wieman S.W. Wissink R. Witt J. Wu Y. Wu N. Xu Q.H. Xu Z. Xu P. Yepes I.-K. Yoo Q. Yue V.I. Yurevich W. Zhan H. Zhang W.M. Zhang Y. Zhang Z.P. Zhang Y. Zhao C. Zhong J. Zhou R. Zoulkarneev Y. Zoulkarneeva A.N. Zubarev J.X. Zuo
Abstract : 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 ($-1 \leq \eta \leq +2$) 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 (SIDIS). We discuss theoretical attempts to reconcile the new results with the sizable transverse spin effects seen in SIDIS and forward hadron production in pp collisions.
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Submitted on : Monday, June 4, 2007 - 1:07:06 PM
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B.I. Abelev, M.M. Aggarwal, Z. Ahammed, B.D. Anderson, D. Arkhipkin, et al.. Measurement of Transverse Single-Spin Asymmetries for Di-Jet Production in Proton-Proton Collisions at $\sqrt{s} = 200$ GeV. Physical Review Letters, American Physical Society, 2007, 99, pp.142003. ⟨10.1103/PhysRevLett.99.142003⟩. ⟨in2p3-00151440⟩

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