Phys. Rev. D
58,
112001
(1998)
[17 pages]
Spin asymmetries A1 and structure functions g1 of the proton and the deuteron from polarized high energy muon scattering
B. Adeva et al. (Spin Muon Collaboration)
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B. Adeva18, T. Akdogan2, E. Arik2, A. Arvidson21,*, B. Badelek21,23, G. Bardin17,†, G. Baum1, P. Berglund8, L. Betev13, I. G. Bird17,‡, R. Birsa20, P. Björkholm21,§, N. de Botton17, M. Boutemeur24,**, F. Bradamante20, A. Bravar11, A. Bressan20,††, S. Bültmann1,‡‡, E. Burtin17, C. Cavata17, D. Crabb22, J. Cranshaw20, T. Çuhadar2,15, S. Dalla Torre20, R. van Dantzig15, B. Derro4, A. Deshpande24, S. Dhawan24, C. Dulya15,4,a, A. Dyring21, S. Eichblattb, J. C. Faivre17, D. Fasching16,c, F. Feinstein17, C. Fernandez18,9, S. Forthmann7, B. Frois17, A. Gallas18, J. A. Garzon18,9, H. Gilly6, M. Giorgi20, E. von Goelerd, S. Goertz3, I. A. Golutvin10, G. Gracia18,e, N. de Groot15,f, M. Grosse Perdekamp24,g, K. Haft13, D. von Harrach11, T. Hasegawa14,h, P. Hautle5,i, N. Hayashi14,j, C. A. Heusch5,k, N. Horikawa14, V. W. Hughes24, G. Igo4, S. Ishimoto14,l, T. Iwata14, E. M. Kabuß11, T. Kageya14,m, A. Karev10, H. J. Kessler6,n, T. J. Ketel15, J. Kiryluk23, I. Kiryushin10, A. Kishi14, Yu. Kisselev10, L. Klostermann15, D. Krämer1, V. Krivokhijine10, W. Kröger5,k, V. Kukhtin10, K. Kurek23, J. Kyynäräinen1,8, M. Lamanna20, U. Landgraf6, J. M. Le Goff17, F. Lehar17, A. de Lesquen17, J. Lichtenstadt19, T. Lindqvist21, M. Litmaath15,††, M. Loweo, A. Magnon17, G. K. Mallot11,††, F. Marie17, A. Martin20, J. Martino17, T. Matsuda14,h, B. Mayes9, J. S. McCarthy22, K. Medved10, W. Meyer3, G. van Middelkoop15, D. Miller16, Y. Miyachi14, K. Mori14, J. Moromisatod, A. Nagaitsev10, J. Nassalski23, L. Naumann5,†, T. O. Niinikoski5, J. E. J. Oberski15, A. Ogawa14,p, C. Ozben2, H. Pereira17, F. Perrot-Kunne17, D. Peshekhonov10, R. Piegia5,q, L. Pinsky9, S. Platchkov17, M. Plo18, D. Pose10, H. Postma15, J. Pretz11,r, R. Puntaferro20, T. Pussieux17, G. Rädel5, A. Rijllart5, G. Reicherz3, J. Robertsk, S. Rock5,s, M. Rodriguez21,q, E. Rondio23,5, L. Ropelewski23,††, I. Sabo19, J. Saborido18,††, A. Sandacz23, I. Savin10, P. Schiavon20, A. Schiller7, K. P. Schüler24,t, R. Seitz11,u, Y. Semertzidis5,v, S. Sergeev10, P. Shanahan16,b, E. P. Sichtermann15, F. Simeoni20, G. I. Smirnov10, A. Staude13, A. Steinmetz11,13, U. Stiegler5, H. Stuhrmann7, M. Szleper23, F. Tessarotto20, D. Thers17, W. Tlaczala23,w, A. Tripet1, G. Unel2, M. Velasco16,††, J. Vogt13, R. Voss5, C. Whitten4, R. Windmolders12, R. Willumeit7, W. Wislicki23, A. Witzmann6,x, J. Ylöstalo8, A. M. Zanetti20, K. Zaremba23,w, N. I. Zamiatin10, and J. Zhao7,y (Spin Muon Collaboration)
1University of Bielefeld, Physics Department, D-33501 Bielefeld, Germany 2Bogaziçi University and Istanbul Technical University, Istanbul, Turkey 3University of Bochum, Physics Department, D-44780 Bochum, Germany 4University of California, Department of Physics, Los Angeles, California 90024 5CERN, 1211 Geneva 23, Switzerland 6University of Freiburg, Physics Department, D-79104 Freiburg, Germany 7GKSS, D-21494 Geesthacht, Germany 8Helsinki University of Technology, Low Temperature Laboratory and Institute of Particle Physics Technology, Espoo, Finland 9University of Houston, Department of Physics, Houston, Texas 77204-5506 10JINR, Dubna, RU-141980 Dubna, Russia 11University of Mainz, Institute for Nuclear Physics, D-55099 Mainz, Germany 12University of Mons, Faculty of Science, 7000 Mons, Belgium 13University of Munich, Physics Department, D-80799 Munich, Germany 14Nagoya University, CIRSE and Department of Physics, Furo-Cho, Chikusa-Ku, 464 Nagoya, Japan 15NIKHEF, Delft University of Technology, FOM and Free University, 1009 AJ Amsterdam, The Netherlands 16Northwestern University, Department of Physics, Evanston, Illinois 60208 17CEA Saclay, DAPNIA, 91191 Gif-sur-Yvette, France 18University of Santiago, Department of Particle Physics, 15706 Santiago de Compostela, Spain 19Tel Aviv University, School of Physics, 69978 Tel Aviv, Israel 20INFN Trieste and University of Trieste, Department of Physics, 34127 Trieste, Italy 21Uppsala University, Department of Radiation Sciences, 75121 Uppsala, Sweden 22University of Virginia, Department of Physics, Charlottesville, Virginia 22901 23Soltan Institute for Nuclear Studies and Warsaw University, 00681 Warsaw, Poland 24Yale University, Department of Physics, New Haven, Connecticut 06511
Received 18 May 1998; published 19 October 1998
We present the final results of the spin asymmetries A1 and the spin structure functions g1 of the proton and the deuteron in the kinematic range 0.0008<x<0.7 and 0.2<Q2<100GeV2. For the determination of A1, in addition to the usual method which employs inclusive scattering events and includes a large radiative background at low x, we use a new method which minimizes the radiative background by selecting events with at least one hadron as well as a muon in the final state. We find that this hadron method gives smaller errors for x<0.02, so it is combined with the usual method to provide the optimal set of results.
© 1998 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.58.112001
DOI:
10.1103/PhysRevD.58.112001
*Now at The Royal Library, 102 41 Stockholm, Sweden. †Deceased. §Now at Ericsson Infotech AB, Karlstad, Sweden. **Now at University of Munich, Physics Department, D-80799 Munich, Germany. ††Now at CERN, 1211 Geneva 23, Switzerland. ‡‡Now at University of Virginia, Department of Physics, Charlottesville, VA 22901. aNow at CIEMAT, Avda Complutense 22, 28040, Madrid, Spain. bNow at Fermi National Accelerator Laboratory, Batavia, IL 60510. cNow at University of Wisconsin. dPermanent address: Northeastern University, Department of Physics, Boston, MA 02115. eNow at NIKHEF P.O.B. 41882, 1009 DB Amsterdam, The Netherlands. fNow at SLAC, Stanford CA 94309. gNow at University of Mainz, Institute of Nuclear Physics, D-55099, Germany. hPermanent address: Miyazaki University, Faculty of Engineering, 889-21 Miyazaki-Shi, Japan. iPermanent address: Paul Scherrer Institut, 5232 Villigen, Switzerland. jPermanent address: The Institute of Physical and Chemical Research (RIKEN), Wako 351-01, Japan. kPermanent address: University of California, Institute of Particle Physics, Santa Cruz, CA 95064. lPermanent address: KEK, Tsukuba-Shi, 305 Ibaraki-Ken, Japan. mNow at University of Michigan, Ann Arbor MI 48109. nNow at SBC Warburg Dillon Read, CH-4002 Basel, Switzerland. oPermanent address: Rice University, Bonner Laboratory, Houston, TX 77251-1892. pNow at Penn. State University, 303 Osmond Lab, University Park, PA 16802. qPermanent address: University of Buenos Aires, Physics Department, 1428 Buenos Aires, Argentina. rNow at Physics Department, Yale University, New Haven, CT 06520. sPermanent address: The American University, Washington D.C. 20016. tNow at DESY, Notkestrasse 85, Hamburg, Germany. uNow at Université de Montréal, Montréal, PQ, H3C 3J7, Canada. vPermanent address: Brookhaven National Laboratory, Upton, NY 11973. wPermanent address: Warsaw University of Technology, Warsaw, Poland. xNow at F. Hoffmann-La Roche Ltd., CH-4070 Basel, Switzerland. yNow at Los Alamos National Laboratory, Los Alamos, NM 87545. ‡Now at Jefferson Laboratory, Newport News, VA.
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