Study of the isospin structure of single-pion production in charged-current neutrino interactions
Study of the isospin structure of single-pion production in charged-current neutrino interactions
复制标题
带电中微子相互作用中单π介子产生的同位旋结构研究
DOI：
10.1103/physrevd.23.2495
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发表时间：
1981
影响因子：
5
通讯作者：
M. Tanaka
中科院分区：
文献类型：
--
作者：
N. Baker;A. Cnops;P. Connolly;S. Kahn;M. Murtagh;R. Palmer;N. Samios;M. Tanaka
The isospin structure of weak single-pion production in the reactions $\ensuremath{\nu}p\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}p{\ensuremath{\pi}}^{+}$, $\ensuremath{\nu}n\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}p{\ensuremath{\pi}}^{0}$, and $\ensuremath{\nu}n\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}n{\ensuremath{\pi}}^{+}$ has been studied using the 7-foot deuterium bubble chamber exposed to a wide-band neutrino beam at BNL. We find that the $I=\frac{1}{2}N\ensuremath{\pi}$ amplitude is substantial even in the $\ensuremath{\Delta}(1232)$ mass region and the relative phase angle $\ensuremath{\psi}$ is approximately 90\ifmmode^\circ\else\textdegree\fi{} as predicted by the Adler model.
The isospin structure of weak single-pion production in the reactions $\ensuremath{\nu}p\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}p{\ensuremath{\pi}}^{+}$, $\ensuremath{\nu}n\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}p{\ensuremath{\pi}}^{0}$, and $\ensuremath{\nu}n\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ensuremath{-}}n{\ensuremath{\pi}}^{+}$ has been studied using the 7-foot deuterium bubble chamber exposed to a wide-band neutrino beam at BNL. We find that the $I=\frac{1}{2}N\ensuremath{\pi}$ amplitude is substantial even in the $\ensuremath{\Delta}(1232)$ mass region and the relative phase angle $\ensuremath{\psi}$ is approximately 90\ifmmode^\circ\else\textdegree\fi{} as predicted by the Adler model.