Scaling Variable Distributions for Antineutrino-Nucleon Scattering in the 15-ft Bubble Chamber at Fermilab

Abstract

This paper continues the discussion of high energy (10–200 GeV) antineutrino interactions with nucleons in the hydrogen-neion filled 15-ft bubble chamber. The earlier paper at this meeting presented by V. Kolganov discussed the limit in this experiment for the reaction ν̄ + N → μ⁺ e^- X. Herein we present the Bjorken scaling variable distributions y and x. The y distributions are fitted with a parameter B which in the quark-parton model is related to the relative antiquark content in the nucleons. The antiquark content is determined to be (10 ± 3) % and shows no antineutrino energy dependence. A comparison is made of fitted B values for this experiment and other antineutrino experiments discussed at this meeting. The x distributions for x > 0.2 are consistent in shape with the structure functions extracted from e-d scattering data.

Work supported by the United States Energy Research and Development Administration. This experiment was performed by the following group: J. P. Berge, F. A. DiBianca, H. Emans, R. Hanft, C. Kochowski, F. A. Nezrick, W. G. Scott, W. Smart, and W. Venus, Fermilab; V. V. Ammosov, A. G. Denisov, P. F. Ermolov, V. A. Gapienko, V. I. Klukhin, V. I. Koreshev, A. I. Mukhin, P. V. Pitukhin, Y. G. Rjabov, E. A. Slobodyuk, and V. I. Sirotenko, IHEP, Serpukhov; V. I. Efremenko, P. A. Gorichev, V. S. Kaftanov, V. D. Khovansky, G. K. Kliger, V. Z. Kolganov, S. P. Krutchinin, M. A. Kubantsev, S. V. Mironov, A. N. Rosanov, and V. G. Shevchenko, ITEP, Moscow; C. T. Coffin, R. N. Diamond, H. French, W. Louis, B. P. Roe, A. A. Seidl, and D. Sinclair, University of Michigan, Ann Arbor.