Spin asymmetries for events with high p_T hadrons in DIS and an evaluation of the gluon polarization

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B. Adeva²⁰, E. Arik², A. Arvidson^23,*, B. Badełek^23,25, G. Baum¹, P. Berglund⁸, L. Betev^13,†, R. Birsa²², N. de Botton¹⁹, F. Bradamante²², A. Bravar^11,‡, A. Bressan²², S. Bültmann^1,§, E. Burtin¹⁹, D. Crabb²⁴, J. Cranshaw^18,**, T. Çuhadar^2,15, S. Dalla Torre²², R. van Dantzig¹⁵, B. Derro⁴, A. Deshpande^26,††, S. Dhawan²⁶, C. Dulya^4,15,‡‡, S. Eichblatt^18,a, D. Fasching^17,b, F. Feinstein¹⁹, C. Fernandez^20,9, B. Frois¹⁹, A. Gallas²⁰, J. A. Garzon^20,9, H. Gilly⁶, M. Giorgi²², E. von Goeler¹⁶, S. Goertz³, G. Gracia^20,c, N. de Groot^15,d, M. Grosse Perdekamp^26,e, K. Haft¹³, D. von Harrach¹¹, T. Hasegawa^14,f, P. Hautle^5,g, N. Hayashi^14,h, C. A. Heusch^5,i, N. Horikawa¹⁴, V. W. Hughes^26,j, G. Igo⁴, S. Ishimoto^14,k, T. Iwata¹⁴, E. M. Kabuß¹¹, A. Karev¹⁰, H. J. Kessler^6,l, T. J. Ketel¹⁵, J. Kiryluk^25,†, Yu. Kisselev¹⁰, L. Klostermann¹⁵, K. Kowalik²⁵, A. Kotzinian¹⁰, W. Kröger^5,i, F. Kunne¹⁹, K. Kurek²⁵, J. Kyynäräinen^1,8, M. Lamanna^22,m, U. Landgraf⁶, J. M. Le Goff¹⁹, F. Lehar¹⁹, A. de Lesquen¹⁹, J. Lichtenstadt²¹, M. Litmaath^15,m, A. Magnon¹⁹, G. K. Mallot^11,m, F. Marie¹⁹, A. Martin²², J. Martino^19,n, T. Matsuda^14,f, B. Mayes⁹, J. S. McCarthy²⁴, K. Medved¹⁰, W. Meyer³, D. Miller¹⁷, Y. Miyachi¹⁴, K. Mori¹⁴, J. Moromisato¹⁶, J. Nassalski²⁵, T. O. Niinikoski⁵, J. E. J. Oberski¹⁵, A. Ogawa^14,‡, C. Ozben^2,o, H. Pereira¹⁹, D. Peshekhonov^10,**, R. Piegaia^26,p, L. Pinsky⁹, S. Platchkov¹⁹, M. Plo²⁰, D. Pose¹⁰, H. Postma¹⁵, J. Pretz^11,q, G. Rädel⁵, G. Reicherz³, J. Roberts^r, M. Rodriguez^23,p, E. Rondio²⁵, I. Sabo²¹, J. Saborido²⁰, A. Sandacz²⁵, I. Savin¹⁰, P. Schiavon²², E. P. Sichtermann^15,26,s, F. Simeoni²², G. I. Smirnov¹⁰, A. Staude¹³, A. Steinmetz¹¹, U. Stiegler⁵, H. Stuhrmann⁷, R. Sulej^25,t, F. Tessarotto²², D. Thers¹⁹, W. Tłaczała^25,t, A. Tripet¹, G. Unel², M. Velasco¹⁷, J. Vogt¹³, R. Voss⁵, C. Whitten⁴, R. Windmolders^12,q, R. Willumeit⁷, W. Wiślicki²⁵, A. Witzmann^6,u, A. M. Zanetti²², K. Zaremba^25,t, and J. Zhao^7,v (Spin Muon Collaboration)
¹Physics Department, University of Bielefeld, 33501 Bielefeld, Germany
²Bogaziçi University and Istanbul Technical University, Istanbul, Turkey
³Physics Department, University of Bochum, 44780 Bochum, Germany
⁴Department of Physics, University of California, Los Angeles, California 90024, USA
⁵CERN, 1211 Geneva 23, Switzerland
⁶Physics Department, University of Freiburg, 79104 Freiburg, Germany
⁷GKSS, 21494 Geesthacht, Germany
⁸Helsinki University of Technology, Low Temperature Laboratory and Institute of Particle Physics Technology, Espoo, Finland
⁹Department of Physics, and Institute for Beam Particle Dynamics, University of Houston, Houston, Texas 77204, USA
¹⁰JINR, Dubna, RU-141980 Dubna, Russia
¹¹University of Mainz, Institute for Nuclear Physics, 55099 Mainz, Germany
¹²University of Mons, Faculty of Science, 7000 Mons, Belgium
¹³Physics Department, University of Munich, 80799 Munich, Germany
¹⁴CIRSE and Department of Physics, Nagoya University, Furo-Cho, Chikusa-Ku, 464 Nagoya, Japan
¹⁵NIKHEF, Delft University of Technology, FOM and Free University, 1009 AJ Amsterdam, The Netherlands
¹⁶Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA
¹⁷Department of Physics, Northwestern University, Evanston, Illinois 60208, USA
¹⁸Bonner Laboratory, Rice University, Houston, Texas 77251-1892, USA
¹⁹C.E.A. Saclay, DAPNIA, 91191 Gif-sur-Yvette, France
²⁰Department of Particle Physics, University of Santiago, 15706 Santiago de Compostela, Spain
²¹School of Physics, Tel Aviv University, 69978 Tel Aviv, Israel
²²Department of Physics, INFN Trieste and University of Trieste, 34127 Trieste, Italy
²³Department of Radiation Sciences, Uppsala University, 75121 Uppsala, Sweden
²⁴Department of Physics, University of Virginia, Charlottesville, Virginia 22901, USA
²⁵Sołtan Institute for Nuclear Studies and Warsaw University, 00681 Warsaw, Poland
²⁶Department of Physics, Yale University, New Haven, Connecticut 06511, USA

^jDeceased.

^mNow at CERN, 1211 Geneva 23, Switzerland.

^**Now at Texas Technical University, Lubbock, TX 79409-1051, USA.

^‡‡Now at CIEMAT, Avda Complutense 22, 28040, Madrid, Spain.

^aNow at Fermi National Accelerator Laboratory, Batavia, IL 60510, USA.

^bNow at University of Wisconsin, USA.

^cNow at NIKHEF, 1009 AJ Amsterdam, The Netherlands.

^dNow at Bristol University, Bristol, UK.

^‡Now at Brookhaven National Laboratory, Upton, NY 11973, USA.

^††Now at Dept. of Physics and Astronomy, SUNY at Stony Brook, Stony Brook, NY 11974, USA.

^eNow at Univ. of Illinois at Urbana-Champaign, 405 North Mathews Av. Urbana, IL 61801, USA.

^fPermanent address: Miyazaki University, Faculty of Engineering, 889-21 Miyazaki-Shi, Japan.

^gPermanent address: Paul Scherrer Institut, 5232 Villigen, Switzerland.

^hPermanent address: The Institute of Physical and Chemical Research (RIKEN), wako 351-01, Japan.

ⁱPermanent address: University of California, Institute of Particle Physics, Santa Cruz, CA 95064, USA.

^kPermanent address: KEK, Tsukuba-Shi, 305 Ibaraki-Ken, Japan.

^lNow at SBC Warburg Dillon Read, CH-4002 Basel, Switzerland.

^†Now at University of California, Department of Physics, Los Angeles, CA 90024, USA.

^pPermanent address: University of Buenos Aires, Physics Department, 1428 Buenos Aires, Argentina.

^rPermanent address: Rice University, Bonner Laboratory, Houston, TX 77251-1892, USA.

^tPermanent address: Warsaw University of Technology, 00-665 Warsaw, Poland.

^uNow at F.Hoffmann-La Roche Ltd., CH-4070 Basel, Switzerland.

^vNow at Oak Ridge National Laboratory, Oak Ridge, TN 37831-6393, USA.

^*Now at The Royal Library, 102 41 Stockholm, Sweden.

^§Now at Old Dominion University, Norfolk, VA 23529, USA.

^qNow at University of Bonn, 53115, Bonn, Germany.

^oNow at University of Illinois at Urbana-Champaign, USA.

ⁿNow at SUBATECH, University of Nantes, UMR IN2P3/CNRS, 44307, Nantes, France.

^sNow at Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.