Measurement of the weak neutral current excitation 12C(νμνμ′)12C∗(1+,1;15.1MeV) at Eνμ=29.8 MeV
Measurement of the weak neutral current excitation 12C(νμνμ′)12C∗(1+,1;15.1MeV) at Eνμ=29.8 MeV
复制标题
Eνμ=29.8 MeV 时弱中性电流激励 12C(νμνμ′)12C*(1+,1;15.1MeV) 的测量
DOI：
10.1016/s0370-2693(98)00087-2
复制
发表时间：
1998
影响因子：
4.4
通讯作者：
B. Zeitnitz
中科院分区：
文献类型：
--
作者：
B. Armbruster;I. Blair;B. Bodmann;N. E. Booth;G. Drexlin;V. Eberhard;J. Edgington;C. Eichner;K. Eitel;E. Finckh;H. Gemmeke;J. Hössl;T. Jannakos;P. Jünger;M. Kleifges;J. Kleinfeller;W. Kretschmer;R. Maschuw;C. Oehler;P. Plischke;J. Rapp;C. Ruf;B. Seligmann;M. Steidl;O. Stumm;J. Wolf;B. Zeitnitz
在KARMEN实验中首次观察到弱中性电流反应12C(νμ,νμ ')12C∗(1+,1;15.1MeV)。使用两种不同的分析方法将中微子事件从背景中分离出来。实测截面σNC=（3.2±0.5stat）。±0.4系统)。× 10−42cm2的单能νμfrom π+-衰变在静止状态下与标准模型很好地吻合，由此推导出弱强子电流的等矢量-轴矢量耦合常数为|β|=1.11±0.13。
The weak neutral current reaction12C(νμ,νμ′)12C∗(1+,1; 15.1MeV) has been observed for the first time in the KARMEN experiment. Neutrino events were separated from background using two different analysis methods. The measured cross section σNC=(3.2 ± 0.5stat.± 0.4syst.) × 10−42cm2for monoenergetic νμfrom π+-decay at rest is in good agreement with the standard model, the isovector-axialvector coupling constant of weak hadronic current deduced from this experiment is |β|=1.11±0.13.