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Title: EVIDENCE CONCERNING PION-PION INTERACTIONS BELOW THE 765-Mev PION-PION RESONANCE

Abstract

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)

Authors:
; ;
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor
OSTI Identifier:
4817674
NSA Number:
NSA-16-024748
Resource Type:
Journal Article
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Physical Review (U.S.) Superseded in part by Phys.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
Additional Journal Information:
Journal Volume: Vol: 126; Other Information: Orig. Receipt Date: 31-DEC-62
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
PHYSICS; CRYSTAL COUNTERS; ENERGY RANGE; INTERACTIONS; LUMINESCENCE; MOMENTUM; PIONS; PIONS-MINUS; PROTONS; RADIATION DETECTORS; RECOILS; RESONANCE; SCINTILLATIONS; SODIUM IODIDES; SPECTRA

Citation Formats

Peck, C C, Jones, L W, and Perl, M L. EVIDENCE CONCERNING PION-PION INTERACTIONS BELOW THE 765-Mev PION-PION RESONANCE. Country unknown/Code not available: N. p., 1962. Web. doi:10.1103/PhysRev.126.1836.
Peck, C C, Jones, L W, & Perl, M L. EVIDENCE CONCERNING PION-PION INTERACTIONS BELOW THE 765-Mev PION-PION RESONANCE. Country unknown/Code not available. doi:10.1103/PhysRev.126.1836.
Peck, C C, Jones, L W, and Perl, M L. Fri . "EVIDENCE CONCERNING PION-PION INTERACTIONS BELOW THE 765-Mev PION-PION RESONANCE". Country unknown/Code not available. doi:10.1103/PhysRev.126.1836.
@article{osti_4817674,
title = {EVIDENCE CONCERNING PION-PION INTERACTIONS BELOW THE 765-Mev PION-PION RESONANCE},
author = {Peck, C C and Jones, L W and Perl, M L},
abstractNote = {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)},
doi = {10.1103/PhysRev.126.1836},
journal = {Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D},
number = ,
volume = Vol: 126,
place = {Country unknown/Code not available},
year = {1962},
month = {6}
}