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LEPRINCE-RINGUET 1944

Leprince-Ringuet, L.; Lheritier, M.;
Existence probable d'une particule de masse 990 m_e dans le rayonnement cosmique / On the Probable Existence of Cosmic Ray Particle with Mass 990 m_e
Compt. Ren. 219 (1944) 618;

Reprinted in
R. N. Cahn and G. Goldhaber, The Experimental Foundations of Particle Physics, Cambridge Univ. Press (1991) 66.

Abstracts
An estimate of mass, 990 m_e ± 12% is obtained by the method of elastic collision for a penetrating particle photographed at 1000 m altitude. Other particles in the same series of photographs show collisions consistent with the normal meson mass. (Science Abstracts, 1947, 2927. J. G. W.).

Accelerator COSM Detectors CLOUD

Related references
See also
L. Leprince-Ringuet, S. Gorodetzky, E. Nageotti, and R. Foy, Compt. Ren. 211 (1940) 382;
L. Leprince-Ringuet, S. Gorodetzky, E. Nageotti, and R. Foy, Phys. Rev. 59 (1941) 460;
R. Richard-Foy, Cahiers de Physique 2 (1942) 65, Compt. Ren. 213 (1941) 1;
S. Gorodetzky, These, Paris (1942);
L. Leprince-Ringuet, S. Gorodetzky, E. Nageotti, and R. Foy, Journal de Physique 2 (1941) 63;