- Physical Review Journals
All JournalsPhysics Magazine
Access Provided by Xinjiang University

Physical Review D

Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

Beam-spin asymmetries from semi-inclusive pion electroproduction

W. Gohn9,*, H. Avakian34, K. Joo9, M. Ungaro34, K. P. Adhikari28, M. Aghasyan17, M. J. Amaryan28, M. D. Anderson36, S. Anefalos Pereira17 et al. (The CLAS Collaboration)

S. Anefalos Pereira17, J. Ball7, N. A. Baltzell1, M. Battaglieri18, A. S. Biselli11,5, J. Bono12, W. J. Briscoe14, W. K. Brooks35,34, V. D. Burkert34, D. S. Carman34, A. Celentano18, S. Chandavar27, G. Charles7,†, P. L. Cole15,34, M. Contalbrigo16, O. Cortes15, V. Crede13, A. D’Angelo19,31, N. Dashyan39, R. De Vita18, E. De Sanctis17, C. Djalali33, D. Doughty8,34, R. Dupre20, A. El Alaoui1,‡, L. El Fassi1,§, P. Eugenio13, G. Fedotov33,32, J. A. Fleming10, T. Forest15, M. Garçon7, Y. Ghandilyan39, G. P. Gilfoyle30, K. L. Giovanetti22, F. X. Girod34, R. W. Gothe33, K. A. Griffioen38, B. Guegan20, L. Guo12, K. Hafidi1, C. Hanretty37, N. Harrison9, Mohammad Hattawy20, K. Hicks27, D. Ho5, M. Holtrop25, C. Hyde28, Y. Ilieva33,14, D. G. Ireland36, B. S. Ishkhanov32, H. S. Jo20, D. Keller37, M. Khandaker26, P. Khetarpal12,¶, W. Kim23, F. J. Klein6, S. Koirala28, V. Kubarovsky34, S. E. Kuhn28, S. V. Kuleshov35,21, P. Lenisa16, K. Livingston36, H. Y. Lu33, I. J. D. MacGregor36, N. Markov9, M. Mayer28, B. McKinnon36, T. Mineeva9, M. Mirazita17, V. Mokeev34,32, A. Movsisyan16, P. Nadel-Turonski34, S. Niccolai20,14, I. Niculescu22, M. Osipenko18, A. I. Ostrovidov13, L. L. Pappalardo16, R. Paremuzyan39,†, K. Park34,23, E. Pasyuk34,2, P. Peng37, J. J. Phillips36, S. Pisano17, S. Pozdniakov21, J. W. Price3, S. Procureur7, Y. Prok28, A. J. R. Puckett9, B. A. Raue12,34, M. Ripani18, B. G. Ritchie2, A. Rizzo19,**, G. Rosner36, P. Rossi17,34, P. Roy13, F. Sabatié7, C. Salgado26, D. Schott14, R. A. Schumacher5, E. Seder9, H. Seraydaryan28, Y. G. Sharabian34, A. Simonyan39, G. D. Smith36, D. I. Sober6, D. Sokhan36, P. Stoler29, I. I. Strakovsky14, S. Stepanyan34, S. Strauch33, W. Tang27, S. Tkachenko37, B. Vernarsky5, H. Voskanyan39, E. Voutier24, N. K. Walford6, D. P. Watts10, L. B. Weinstein28, M. H. Wood4,33, N. Zachariou33, L. Zana10, J. Zhang34, and I. Zonta19,** (The CLAS Collaboration)

  • 1Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 2Arizona State University, Tempe, Arizona 85287-1504, USA
  • 3California State University, Dominguez Hills, Carson, California 90747, USA
  • 4Canisius College, Buffalo, New York 14208, USA
  • 5Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, ISA
  • 6Catholic University of America, Washington, District of Columbia 20064, USA
  • 7CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
  • 8Christopher Newport University, Newport News, Virginia 23606, USA
  • 9University of Connecticut, Storrs, Connecticut 06269, USA
  • 10Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
  • 11Fairfield University, Fairfield, Connecticut 06824, USA
  • 12Florida International University, Miami, Florida 33199, USA
  • 13Florida State University, Tallahassee, Florida 32306, USA
  • 14The George Washington University, Washington, District of Columbia 20052, USA
  • 15Idaho State University, Pocatello, Idaho 83209, USA
  • 16INFN, Sezione di Ferrara, 44100 Ferrara, Italy
  • 17INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
  • 18INFN, Sezione di Genova, 16146 Genova, Italy
  • 19INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
  • 20Institut de Physique Nucléaire ORSAY, Orsay, France
  • 21Institute of Theoretical and Experimental Physics, Moscow 117259, Russia
  • 22James Madison University, Harrisonburg, Virginia 22807, USA
  • 23Kyungpook National University, Daegu 702-701, Republic of Korea
  • 24LPSC, Universite Joseph Fourier, CNRS/IN2P3, INPG, Grenoble, France
  • 25University of New Hampshire, Durham, New Hampshire 03824-3568, USA
  • 26Norfolk State University, Norfolk, Virginia 23504, USA
  • 27Ohio University, Athens, Ohio 45701, USA
  • 28Old Dominion University, Norfolk, Virginia 23529, USA
  • 29Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA
  • 30University of Richmond, Richmond, Virginia 23173, USA
  • 31Universita’ di Roma Tor Vergata, 00133 Rome, Italy
  • 32Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
  • 33University of South Carolina, Columbia, South Carolina 29208, USA
  • 34Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA
  • 35Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
  • 36University of Glasgow, Glasgow G12 8QQ, United Kingdom
  • 37University of Virginia, Charlottesville, Virginia 22901, USA
  • 38College of William and Mary, Williamsburg, Virginia 23187-8795, USA
  • 39Yerevan Physics Institute, 375036 Yerevan, Armenia

  • *gohn@pa.uky.edu; Present address: University of Kentucky, Lexington, Kentucky 40506, USA.
  • †Present address: Institut de Physique Nucléaire ORSAY, Orsay, France.
  • ‡Present address: Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
  • §Present address: Old Dominion University, Norfolk, Virginia 23529, USA.
  • Present address: Mathworks, Natick, Massachusetts 01760, USA.
  • **Present address: Universita’ di Roma Tor Vergata, 00133 Rome, Italy.
PDF

Phys. Rev. D 89, 072011 – Published 11 April, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.072011

Abstract

We have measured the moment ALUsinϕ corresponding to the polarized electron beam-spin asymmetry in semi-inclusive deep inelastic scattering. ALUsinϕ is a twist-3 quantity providing information about quark-gluon correlations. Data were taken with the CLAS Spectrometer at Jefferson Lab using a 5.498 GeV longitudinally polarized electron beam and an unpolarized liquid hydrogen target. All three pion channels (π+, π0 and π−) were measured simultaneously over a large range of kinematics within the virtuality range Q2≈ 1.0–4.5  GeV2. The observable was measured with better than 1% statistical precision over a large range of z, PT, xB, and Q2, which permits comparison with several reaction models. The discussed measurements provide an upgrade in statistics over previous measurements, and serve as the first evidence for the negative sign of the π− sinϕ moment.

View figure in article

Article Text

References (60)

  1. J. Ashman et al. (European Muon Collaboration), Nucl. Phys. B328, 1 (1989).
  2. P. Djawotho (STAR Collaboration), arXiv:1106.5769.
  3. L. Adamczyk et al. (STAR Collaboration), Phys. Rev. D 86, 032006 (2012).
  4. A. Adare et al. (PHENIX Collaboration), Phys. Rev. Lett. 103, 012003 (2009).
  5. D. de Florian, R. Sassot, M. Stratmann, and W. Vogelsang, Phys. Rev. D 80, 034030 (2009).
  6. A. V. Belitsky, X.-d. Ji, and F. Yuan, Phys. Rev. D 69, 074014 (2004).
  7. S. Meissner, A. Metz, and M. Schlegel, arXiv:0807.1154.
  8. C. Lorce, B. Pasquini, and M. Vanderhaeghen, J. High Energy Phys. 05 (2011) 041.
  9. A. Bacchetta, U. D’Alesio, M. Diehl, and C. A. Miller, Phys. Rev. D 70, 117504 (2004).
  10. A. Bacchetta, M. Diehl, K. Goeke, A. Metz, P. J. Mulders, and M. SchlegelA. Bacchetta, M. Diehl, K. Goeke, A. Metz, P. J. Mulders, and M. Schlegel, J. High Energy Phys. 02 (2007) 093.
  11. J. Levelt and P. J. Mulders, Phys. Lett. B 338, 357 (1994).
  12. R. L. Jaffe, arXiv:hep-ph/9602236.
  13. A. V. Efremov, K. Goeke, and P. Schweitzer, Phys. Rev. D 67, 114014 (2003).
  14. P. Schweitzer, Phys. Rev. D 67, 114010 (2003).
  15. Y. Ohnishi and M. Wakamatsu, Phys. Rev. D 69, 114002 (2004).
  16. A. Afanasev and C. E. Carlson, arXiv:hep-ph/0308163.
  17. F. Yuan, Phys. Lett. B 589, 28 (2004).
  18. A. Bacchetta, P. J. Mulders, and F. Pijlman, Phys. Lett. B 595, 309 (2004).
  19. A. Metz and M. Schlegel, Eur. Phys. J. A 22, 489 (2004).
  20. F. Pijlman, arXiv:hep-ph/0604226.
  21. Z. Lu and I. Schmidt, Phys. Lett. B 712, 451 (2012).
  22. W. Mao and Z. Lu, Phys. Rev. D 87, 014012 (2013).
  23. D. Boer and P. J. Mulders, Phys. Rev. D 57, 5780 (1998).
  24. D. W. Sivers, Phys. Rev. D 43, 261 (1991).
  25. R. Jaffe and X.-D. Ji, Nucl. Phys. B375, 527 (1992).
  26. M. Burkardt, AIP Conf. Proc. 1155, 26 (2009).
  27. J. C. Collins, Nucl. Phys. B396, 161 (1993).
  28. R. Seidl et al. (Belle Collaboration), Phys. Rev. D 78, 032011 (2008).
  29. A. Airapetian et al. (HERMES Collaboration), Phys. Lett. B 693, 11 (2010).
  30. M. Alekseev et al. (COMPASS Collaboration), Phys. Lett. B 692, 240 (2010).
  31. M. Penttinen, M. V. Polyakov, A. Shuvaev, and M. Strikman, Phys. Lett. B 491, 96 (2000).
  32. X. Ji, X. Xiong, and F. Yuan, Phys. Rev. D 88, 014041 (2013).
  33. Y. Hatta and S. Yoshida, J. High Energy Phys. 10 (2012) 080.
  34. B. A. Mecking et al., Nucl. Instrum. Methods Phys. Res., Sect. A 503, 513 (2003).
  35. M. Mestayer et al., Nucl. Instrum. Methods Phys. Res., Sect. A 449, 81 (2000).
  36. G. Adams et al., Nucl. Instrum. Methods Phys. Res., Sect. A 465, 414 (2001).
  37. M. Amarian et al., Nucl. Instrum. Methods Phys. Res., Sect. A 460, 239 (2001).
  38. E. Smith et al., Nucl. Instrum. Methods Phys. Res., Sect. A 432, 265 (1999).
  39. P. Schweitzer, T. Teckentrup, and A. Metz, Phys. Rev. D 81, 094019 (2010).
  40. R. Brun and F. Rademaker, Nucl. Instrum. Methods Phys. Res., Sect. A 389, 81 (1997).
  41. G. Ingelman, A. Edin, and J. Rathsman, Comput. Phys. Commun. 101, 108 (1997).
  42. R. Brun, R. Hagelberg, M. Hansroul, and J. Lassalle, Reports No. CERN-DD-78-2-REV and No. CERN-DD-78-2, CERN, 1978.
  43. CLAS physics database, http://clasweb.jlab.org/physicsdb.
  44. A. Airapetian et al. (HERMES Collaboration), Phys. Lett. B 648, 164 (2007).
  45. H. Avakian, AIP Conf. Proc. 675, 434 (2003).
  46. H. Avakian et al. (CLAS Collaboration), Phys. Rev. D 69, 112004 (2004).
  47. M. Aghasyan et al., Phys. Lett. B 704, 397 (2011).
  48. A. V. Efremov, K. Goeke, and P. Schweitzer, Nucl. Phys. A711, 84 (2002).
  49. H. Avakian, A. V. Efremov, P. Schweitzer, O. V. Teryaev, F. Yuan, and P. Zavada (CLAS Collaboration), Mod. Phys. Lett. A 24, 2995 (2009).
  50. H. Avakian, A. V. Efremov, P. Schweitzer, and F. Yuan, Phys. Rev. D 81, 074035 (2010).
  51. A. V. Efremov, K. Goeke, and P. Schweitzer, Phys. Rev. D 73, 094025 (2006).
  52. B. Pasquini and P. Schweitzer, Phys. Rev. D 83, 114044 (2011).
  53. W. Mao and Z. Lu, Eur. Phys. J. C 73, 2557 (2013).
  54. A. Bacchetta, F. Conti, and M. Radici, Phys. Rev. D 78, 074010 (2008).
  55. A. Bacchetta, A. Schaefer, and J.-J. Yang, Phys. Lett. B 578, 109 (2004).
  56. A. Airapetian et al. (HERMES Collaboration), Phys. Rev. Lett. 103, 152002 (2009).
  57. C. Adolph et al. (COMPASS Collaboration), Phys. Lett. B 717, 383 (2012).
  58. C. Adolph et al. (COMPASS Collaboration), Phys. Lett. B 717, 376 (2012).
  59. H. Avakian, AIP Conf. Proc. 1388, 464 (2011).
  60. D. Boer et al., arXiv:1108.1713

Outline

Information

Phys. Rev. D 89, 072011– Published 11 April, 2014
  • Received 18 February 2014

© 2014 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation