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Evidence for higher twist effects in fast π− production by antineutrinos in neon |
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| Authors: | P. J. Fitch P. Kasper A. M. Cooper-Sarkar M. Aderholz N. Armenise T. Azemoon D. Bertrand M. Berggren F. W. Bullock M. Calicchio E. F. Clayton T. Coghen O. Erriquez G. Gerbier J. Guy P. O. Hulth G. Iaselli G. T. Jones M. Lagraa P. Marage R. P. Middleton D. Miller M. M. Mobayyen M. Neveu S. W. O'Neale M. A. Parker R. A. Sansum E. Simopoulou K. Varvell C. Vallée A. Vayaki W. Venus H. Wachsmuth W. Wittek J. Wells E. Zevgolatakos BEBC WA Collaboration |
| Affiliation: | 1. Department of Physics and Astronomy, University College, WC 1 E 6BT, London, UK 2. Rutherford Appleton Laboratory, Chilton, O X 11 0QX, Didcot, UK 4. Max-Planck-Institut für Physik und Astrophysik, D-8000, München, Federal Republic of Germany 5. Dipartimento di Fisica dell'Università e Sezione INFN, I-70100, Bari, Italy 6. Inter-University Institute for High Energies ULB-VUB, B-1050, Brussels, Belgium 8. Institute of Physics, University of Stockholm, S-11346, Stockholm, Sweden 9. Imperial College of Science and Technology, SW 7 2 AZ, London, UK 10. Institute of Nuclear Physics, PL-30055, Cracow, Poland 3. DPhPE, Centre d'Etudes Nucléaires, Saclay, F-91191, Gif-sur-Y vette, France 11. University of Birmingham, B 15 2 TT, Birmingham, UK 14. European Organization for Nuclear Research, CERN, CH-1211, Geneva 23, Switzerland 15. Nuclear Research Centre Demokritos, Attiki, Athens, Greece 16. Department of Nuclear Physics, O X 1 3 RH, Oxford, UK 18. Ecole Polytechnique, LPNHE, F-91128, Palaiseau, France |
| Abstract: | Evidence for a significant higher twist contribution to highz π? production in antineutrino scattering is presented. In events withW>3 GeV andQ 2>1 GeV2 in our data, it accounts for (51 ±8)% of all π? withz above 0.5. It is consistent with thez?Q 2 correlations of Berger's higher twist prediction. The data are inconclusive concerning the predictedy?z correlation andp T dependence. Thez ?Q 2 correlation is not adequately described by the Lund Monte-Carlo. |
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