Study of the K− → μ−νπ0 decay
Study of the K− → μ−νπ0 decay
复制标题
K− → μ−νπ0 衰变的研究
DOI：
10.1134/1.1540663
复制
发表时间：
2002
影响因子：
0.4
通讯作者：
V. Z. Serdyuk
中科院分区：
文献类型：
--
作者：
I. Ajinenko;S. Akimenko;G. Akopdzhanov;K. Belous;I. Britvich;G. Britvich;A. Filin;V. N. Govorun;A. Inyakin;V. Konstantinov;A. Konstantinov;I. Korolkov;V. Khmelnikov;V. Leontiev;V. Novikov;V. Obraztsov;V. Polyakov;V. Romanovsky;V. Ronjin;V. Sen’ko;N. Shalanda;M. Shapkin;V. Shelikhov;N. Smirnov;A. Sokolov;O. Tchikilev;E. Vlasov;O. Yushchenko;Russia V. N. Bolotov;S. Laptev;A. Polyarush;S. Yaschenko;B. Zh;V. Z. Serdyuk
用ISTRA+装置在U-70 PS的25gev负二次束流中检测到的飞行衰减K−→μ−νπ0进行了研究。测量了衰减形式因子f+(t)和f0(t)的λ+和λ0斜率参数：λ+=0.0321±0.004（stat.）±0.002(syst.), λ0=0.0209±0.004（stat.）±0.002(syst.)；相关系数dλ0/dλ+= - 0.46。推导了可能的张量和标量耦合的极限：fT/f+(0)= - 0.021±0.028（stat.）±0.014(theor.), fS/f+(0)=0.004±0.005（stat.）±0.005（theor.）。
The decay K− → μ−νπ0 has been studied using in-flight decays detected with the ISTRA+ setup operating in the 25-GeV negative secondary beam of the U-70 PS. About 112K events were used for the analysis. The λ+ and λ0 slope parameters of the decay form factors f+(t) and f0(t) have been measured: λ+=0.0321±0.004(stat.)±0.002(syst.), λ0=0.0209±0.004(stat.)±0.002(syst.); the correlation dλ0/dλ+=−0.46. The limits on the possible tensor and scalar couplings have been derived: fT/f+(0)=−0.021±0.028(stat.)±0.014(theor.), fS/f+(0)=0.004±0.005(stat.)±0.005(theor.).