Accession Number : AD0635818

Title :   A SEARCH FOR MASSIVE PARTICLES IN COSMIC RAYS.

Corporate Author : MIDWESTERN UNIVERSITIES RESEARCH ASSOCIATION STOUGHTON WIS

Personal Author(s) : Dayton, B. ,F. ; Radner,Mills, C. ; Jones,L. W. ; Camerina,U.

Report Date : 18 APR 1966

Pagination or Media Count : 28

Abstract : A search for long-lived particles (> approx. 0.000006) of mass in the range of about 5-15 BeV was carried out among cosmic rays at the summit of Mt. Evans, Colorado, by measuring time intervals between the arrival of strongly interacting particles of energy > approx. 70 GeV and accompanying air shower particles. From the absence of delayed strongly interacting particles in the range 40-180 ns where particles of nucleonic mass are not allowed, it is concluded that an upper limit of 160 microbarns/nucleon could be placed on the cross-section for production of particles of mass around 8 BeV at energies not far above threshold in nucleon-nucleon collisions. This limit is subject to certain restrictive assumptions about the behavior of the hypothetical massive particles, which are discussed. (Author)

Descriptors :   (*COSMIC RAYS, *ELEMENTARY PARTICLES), NUCLEAR RADIATION SPECTROSCOPY, COSMIC RAYS, NUCLEAR CROSS SECTIONS, ATMOSPHERES

Subject Categories : Atmospheric Physics
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE