On the Disintegration of the Positive Heavy Meson

被引:1
作者
Pessoa, Elisa Frota [1 ,2 ]
Margem, Neusa [1 ]
机构
[1] Fac Nacl Filosofia, Dept Fis, Rio De Janeiro, Brazil
[2] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
关键词
D O I
10.1007/s13538-021-00987-4
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Two hundred cases of meson decay have been studied in order to verify if, beyond the known type of decay of the pi(+) meson in a light mu meson and a neutrino, a different type of disintegration of the pi(+) meson directly in one positive electron and a neutrino (which is theoretically possible) should be observed and, if so, what should be the probability of occurrence of such a process. The pi(+) mesons studied have been produced by bombarding targets of carbon with protons of 350 MeV in the cyclotron of 184 inches, at the Radiation laboratory, in Berkeley, and have been detected with nuclear emulsions G.5. Associating the method of mass determination by the range and the radius of curvature, with the method of grain counting, it has been possible to verify that, in the 200 cases under examination, all the mesons decayed following the scheme: pi(+) -> mu(+) + [nu]. During the investigation a system of three tracks departing from the same point has been observed, which is probably a "star" of three branches, produced by the capture of a high energy neutron by a nucleus of the emulsion. One of the branches is due to a meson which decays in a mu meson whose track is totally observed and ends in the emulsion.
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页码:1492 / 1500
页数:9
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