EVIDENCE CONCERNING PION-PION INTERACTIONS BELOW THE 765-Mev PION-PION RESONANCE
A search was made for pi - pi resonances in the reaction pi /sup -/ + p yields pi /sup -/ + pi /sup o/ + p at 871 and 775 Mev, using a sodiu miodide luminescent chamber as a detector. The spectra of m*, the total energy of the 2 pions in their own barycentric system, are presented and compared with the spectra predicted by phase-space alone. The maximum m* is 695 Mev, and the recoil proton momenta are 400 to 700 Mev/c. The 871-Mev spectrum shows a deviation from the phase-space prediction in the form of an abrupt rise at an m* of 590 Mev. This rise is most prominent for the spectrum with recoil proton momenta above 550 Mev/c. The 775-Mev spectrum does not show any strong deviations from phase space. lt is concluded that the peak above phase space in the m* spectrum range of 575 to 700 Mev is due to at least one other process besides the 765-Mev 2- pi resonance particular. The possible existence of a new two-pion, T = 1 resonance with an m* of about 600 Mev is discussed. An evaluation of the performance of the luminescent chamber is made. (auth)
- Research Organization:
- Univ. of Michigan, Ann Arbor, MI (United States)
- NSA Number:
- NSA-16-024748
- OSTI ID:
- 4817674
- 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- Physical Review (U.S.) Superseded in part by Phys.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, Vol. Vol: 126; Other Information: Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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