Phys. Rev. C
67,
055204
(2003)
[13 pages]
Measurement of inclusive spin structure functions of the deuteron
J. Yun et al. (CLAS Collaboration)
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J. Yun1, S. E. Kuhn1,*, G. E. Dodge1, T. A. Forest1,2, M. Taiuti3, G. S. Adams30, M. J. Amaryan39, E. Anciant5, M. Anghinolfi3, B. Asavapibhop24, G. Asryan39, G. Audit5, T. Auger5, H. Avakian18, S. Barrow15, M. Battaglieri3, K. Beard21, M. Bektasoglu1, W. Bertozzi23, N. Bianchi18, A. S. Biselli30, S. Boiarinov20, P. Bosted24, S. Bouchigny19, R. Bradford7, D. Branford13, W. K. Brooks35, S. Bueltmann37, V. D. Burkert35, C. Butuceanu10, J. R. Calarco26, D. S. Carman28, B. Carnahan8, C. Cetina16, L. Ciciani1, P. L. Cole34, A. Coleman10, J. Connelly16, D. Cords35,†, P. Corvisiero3, D. Crabb37, H. Crannell8, J. Cummings30, E. De Sanctis18, R. De Vita3, P. V. Degtyarenko35, R. A. Demirchyan39, H. Denizli29, L. C. Dennis15, K. V. Dharmawardane1, C. Djalali33, J. Domingo35, D. Doughty9,35, P. Dragovitsch15, M. Dugger4, S. Dytman29, M. Eckhause10, Y. V. Efremenko20, H. Egiyan10, K. S. Egiyan39, L. Elouadrhiri9,35, A. Empl30, L. Farhi5, R. Fatemi37, R. J. Feuerbach7, J. Ficenec38, K. Fissum23, A. Freyberger35, V. Frolov30, H. Funsten10, S. J. Gaff12, M. Gai11, G. Gavalian39, V. B. Gavrilov20, S. Gilad23, G. P. Gilfoyle32, K. L. Giovanetti21, P. Girard33, E. Golovatch25, C. I. O. Gordon17, K. A. Griffioen10, M. Guidal19, M. Guillo33, L. Guo35, V. Gyurjyan35, C. Hadjidakis19, D. Hancock10, J. Hardie9, D. Heddle9,35, P. Heimberg16, F. W. Hersman26, K. Hicks28, R. S. Hicks24, M. Holtrop26, J. Hu30, C. E. Hyde-Wright1, M. M. Ito35, D. Jenkins38, K. Joo37, C. Keith35, J. H. Kelley12, M. Khandaker27,35, K. Y. Kim29, K. Kim22, W. Kim22, A. Klein1, F. J. Klein35,8, A. V. Klimenko1, M. Klusman30, M. Kossov20, L. H. Kramer14,35, Y. Kuang10, J. Kuhn30, J. Lachniet7, J. M. Laget5, D. Lawrence24, G. A. Leksin20, K. Loukachine38,8, R. W. Major32, J. J. Manak35, C. Marchand5, S. McAleer15, J. W. C. McNabb7, J. McCarthy37, B. A. Mecking35, M. D. Mestayer35, C. A. Meyer7, R. Minehart37, M. Mirazita18, R. Miskimen24, V. Mokeev25, S. Morrow19, V. Muccifora18, J. Mueller29, L. Y. Murphy16, G. S. Mutchler31, J. Napolitano30, S. O. Nelson12, S. Niccolai16, G. Niculescu28, B. Niczyporuk35, R. A. Niyazov1, M. Nozar35, G. V. O’Rielly16, M. S. Ohandjanyan39, A. Opper28, M. Ossipenko25, K. Park22, Y. Patois33, G. A. Peterson24, S. Philips16, N. Pivnyuk20, D. Pocanic37, O. Pogorelko20, E. Polli18, B. M. Preedom33, J. W. Price6, D. Protopopescu17, L. M. Qin1, B. A. Raue14,35, G. Riccardi15, G. Ricco3, M. Ripani3, B. G. Ritchie4, S. Rock24, F. Ronchetti18, P. Rossi18, D. Rowntree23, P. D. Rubin32, K. Sabourov12, C. W. Salgado27, V. Sapunenko3, M. Sargsyan39, R. A. Schumacher7, V. S. Serov20, Y. G. Sharabian39, J. Shaw24, S. M. Shuvalov20, S. Simionatto16, A. Skabelin23, E. S. Smith35, L. C. Smith37, T. Smith26, D. I. Sober8, L. Sorrell24, M. Spraker12, S. Stepanyan39,1, P. Stoler30, S. Taylor31, D. Tedeschi33, U. Thoma35, R. Thompson29, L. Todor7, T. Y. Tung10, C. Tur33, M. F. Vineyard36, A. Vlassov20, K. Wang37, L. B. Weinstein1, H. Weller12, R. Welsh10, D. P. Weygand35, S. Whisnant33, M. Witkowski30, E. Wolin35, M. H. Wood35, A. Yegneswaran35, B. Zhang23, J. Zhao23, and Z. Zhou23 (CLAS Collaboration)
1Old Dominion University, Department of Physics, Norfolk, Virginia 23529
2Center for Applied Physics Studies, Louisiana Tech University, Ruston, Louisiana 71272
3Istituto Nazionale di Fisica Nucleare, Sezione di Genova e Dipartimento di Fisica dell’Università, 16146 Genova, Italy
4Arizona State University, Department of Physics and Astronomy, Tempe, Arizona 85287
5CEA Saclay, DAPNIA-SPhN, F91191 Gif-sur-Yvette Cedex, France
6University of California at Los Angeles, Department of Physics and Astronomy, Los Angeles, California 90095-1547
7Carnegie Mellon University, Department of Physics, Pittsburgh, Pennsylvania 15213
8Catholic University of America, Department of Physics, Washington, D.C. 20064
9Christopher Newport University, Newport News, Virginia 23606
10College of William and Mary, Department of Physics, Williamsburg, Virginia 23187
11University of Connecticut, Physics Department, Storrs, Connecticut 06269
12Duke University, Physics Building TUNL, Durham, North Carolina 27706
13Department of Physics and Astronomy, Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
14Florida International University, Miami, Florida 33199
15Florida State University, Department of Physics, Tallahassee, Florida 32306
16George Washington University, Department of Physics, Washington, D.C. 20052
17University of Glasgow, Glasgow G12 8QQ, United Kingdom
18Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, P.O. 13, 00044 Frascati, Italy
19Institut de Physique Nucleaire d’Orsay, IN2P3, Boîte Postale 1, 91406 Orsay, France
20Institute of Theoretical and Experimental Physics, 25 B. Cheremushkinskaya Street, Moscow, 117259, Russia
21James Madison University, Department of Physics, Harrisonburg, Virginia 22807
22Kyungpook National University, Department of Physics, Taegu 702-701, South Korea
23Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307
24University of Massachusetts, Department of Physics, Amherst, Massachusetts 01003
25University of Moscow, Moscow 119899, Russia
26University of New Hampshire, Department of Physics, Durham, New Hampshire 03824
27Norfolk State University, Norfolk, Viginia 23504
28Ohio University, Department of Physics, Athens, Ohio 45701
29University of Pittsburgh, Department of Physics and Astronomy, Pittsburgh, Pennsylvania 15260
30Rensselaer Polytechnic Institute, Department of Physics, Troy, New York 12181
31Rice University, Bonner Lab, Box 1892, Houston, Texas 77251
32University of Richmond, Department of Physics, Richmond, Virginia 23173
33University of South Carolina, Department of Physics, Columbia, South Carolina 29208
34University of Texas at El Paso, Department of Physics, El Paso, Texas 79968
35Thomas Jefferson National Accelerator Facility, 12000 Jefferson Avenue, Newport News, Virginia 23606
36Union College, Department of Physics, Schenectady, New York 12308
37University of Virginia, Department of Physics, Charlottesville, Virginia 22903
38Virginia Polytechnic and State University, Department of Physics, Blacksburg, Virginia 24061
39Yerevan Physics Institute, 375036 Yerevan, Armenia Pittsburgh, Pennsylvania 15213
Received 18 December 2002; published 19 May 2003
We report the results of a new measurement of spin structure functions of the deuteron in the region of moderate momentum transfer [Q2=0.27–1.3(GeV/c)2] and final hadronic state mass in the nucleon resonance region (W=1.08–2.0GeV). We scattered a 2.5 GeV polarized continuous electron beam at Jefferson Lab off a dynamically polarized cryogenic solid state target (15ND3) and detected the scattered electrons with the CEBAF large acceptance spectrometer. From our data, we extract the longitudinal double spin asymmetry A|| and the spin structure function g1d. Our data are generally in reasonable agreement with existing data from SLAC where they overlap, and they represent a substantial improvement in statistical precision. We compare our results with expectations for resonance asymmetries and extrapolated deep inelastic scaling results. Finally, we evaluate the first moment of the structure function g1d and study its approach to both the deep inelastic limit at large Q2 and to the Gerasimov-Drell-Hearn sum rule at the real photon limit (Q2→0). We find that the first moment varies rapidly in the Q2 range of our experiment and crosses zero at Q2 between 0.5 and 0.8(GeV/c)2, indicating the importance of the Δ resonance at these momentum transfers.
© 2003 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevC.67.055204
DOI:
10.1103/PhysRevC.67.055204
PACS:
13.60.Hb, 13.88.+e, 14.20.Dh
*Corresponding author. Email address: skuhn@odu.edu †Deceased.
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