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Measurement of the structure functionsF 2 andxF 3 and comparison with QCD predictions including kinematical and dynamical higher twist effects |
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| Authors: | K. Varvell A. M. Cooper-Sarkar M. A. Parker R. A. Sansum M. Aderholz N. Armenise J. P. Baton F. W. Bullock M. Berggren D. Bertrand V. Brisson W. Burkot M. Calcchio E. F. Claytoh T. Coghen O. Erriquez P. J. Fitch G. Gerbier J. Guy P. O. Hulth G. Iaselli G. T. Jones P. Kasper H. Klein C. Kochowski P. Marage M. Mermikides R. P. Middleton D. R. O. Morrison M. M. Mobayyen S. Natali M. Neveu S. Nuzzo S. W. O'Neale P. Petiau A. Petrides F. Ruggieri J. Sacton E. Simopoulou C. Vallee A. Vayaki W. A. Venus H. Wachsmuth J. Wells W. Wittek BEBC WA Collaboration |
| Affiliation: | 1. Department of Nuclear Physics, OX1 3RH, Oxford, UK 2. Rutherford Appleton Laboratory, Chilton, OX11 QQX, Didcot, UK 3. CERN, CH-1211, Geneva 23, Switzerland 4. Physics and Astronomy Department, University College London, WC1E 6BT, UK 5. Max-Planck-Institut für Physik und Astrophysik, D-8000, München, Federal Republic of Germany 6. Dipartimento di Fisica dell' Universita e Sezione INFN, I-70126, Bari, Italy 7. DPhPE, Centre d'Etudes Nucleaires, Saclay, F-91191, Gif-sur-Yvette, France 8. Institute of Physics, University of Stockholm, S-11346, Stockholm, Sweden 9. Inter-University Institute for High Energies, ULB-VUB, B-1050, Brussels, Belgium 11. LPNHE, Ecole Polytechnique, F-91128, Palaiseau, France 12. Institute of Nuclear Physics, PL-30055, Cracow, Poland 13. Imperial College of Science and Technology, SW7 2AZ, London, UK 15. University of Birmingham, B15 2TT, Birmingham, UK 17. Nuclear Research Centre Demokritos, Athens, Greece |
| Abstract: | The isoscalar nucleon structure functionsF 2(x, Q 2) andxF 3(x, Q 2) are measured in the range 0<Q 2<64 GeV2, 1.7<W 2<250 GeV2,x<0.7 using ν and (bar v) interactions on neon in BEBC. The data are used to evaluate possible higher twist contributions and to determine their impact on the evaluation of the QCD parameter Λ. In contrast to previous analyses reaching to such lowW 2 values, it is found that a low (Lambda _{overline {MS} } ) value in the neighbourhood of 100 MeV describes the data adequately and that the contribution of dynamical higher twist effects is small and negative. |
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