MASS OF THE CHARGED $Sigma$ HYPERONS
Twenty-nine examples of SIGMA /sup +/ hyperon decays at rest into protons were used to determine the mass of the SIGMA /sup +/ hyperon. The stopping power for each batch of emulsions containing these events was determined by making use of mu /sup +/-meson ranges obtained from the decay of pi /sup +/ mesons at rest. The mean range of protons from SIGMA /sup +/ decays was found to bs 1656.5 plus or minus 6.0 microns. The rms deviation was 37.2 plus or minus 6.0 microns. The Q value for the decay ( SIGMA /sup +/ yields p + pi / sup 0/ was found to bs 116.37 plus or minus 0.4 Mev and the mass of the SIGMA / sup +/ hyperon, (2328.1 plus or minus 0.8)m/sup e/. An analysis of three collinear events, which resulted from the interaction of stopped K/sup -/ mesons with hydrogen nuclei of the emulsion, gave the SIGMA - hyperon mass to be (2341.6 plus or minus 2.O)m/sub e/ and the mass difference between SIGMA /sup - / and SIGMA /sup +/ hyperons (13.5 plus or minus 2.0)m/sub e/. (auth)
- Research Organization:
- Univ. of Wisconsin, Madison; Tufts Univ., Medford, Mass.
- NSA Number:
- NSA-13-016420
- OSTI ID:
- 4243565
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 114; ISSN PHRVA
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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