Study of the reaction ν μ d → μ − p p s </mml:msub…
1982; American Physical Society; Volume: 26; Issue: 3 Linguagem: Inglês
10.1103/physrevd.26.537
ISSN1538-4500
AutoresK. Miller, S. J. Barish, A. Engler, R.W. Kraemer, B.J. Stacey, M. Derrick, E. Fernández, L. Hyman, G. Levman, D. D. Koetke, B. Musgrave, P. Schreiner, R. Singer, A. Snyder, S. Toaff, D. D. Carmony, G. M. Radecky, V. E. Barnes, A. F. Garfinkel, R. Ammar, D. Coppage, Donal B. Day, R. Davis, N. Kwak, R. Stump,
Tópico(s)Particle accelerators and beam dynamics
ResumoThis paper reports a determination of the axial-vector form factor of the nucleon using the momentum-transfer distribution for 1737 events of the type ${\ensuremath{\nu}}_{\ensuremath{\mu}}d\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}p{p}_{s}$. The events were obtained from a 2.4\ifmmode\times\else\texttimes\fi{}${10}^{6}$-frame exposure of the Argonne 12-foot bubble chamber to a neutrino beam at the Argonne Zero Gradient Synchrotron. After fitting and applying selection criteria, the background was estimated to be at the 2% level. The axial-vector mass in the dipole parametrization was measured to be ${M}_{A}=1.00\ifmmode\pm\else\textpm\fi{}0.05$ GeV/${\mathit{c}}^{2}$, in good agreement both with earlier measurements from this experiment and with other recent results. A test of the conserved-vector-current hypothesis, made by simultaneously fitting ${M}_{A}$ and ${M}_{V}$ using dipole form factors, gave ${M}_{A}=0.80\ifmmode\pm\else\textpm\fi{}0.10$ GeV/${\mathit{c}}^{2}$ and ${M}_{V}=0.96\ifmmode\pm\else\textpm\fi{}0.04$ GeV/${\mathit{c}}^{2}$.
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