2007/12/27 by Jack L. Uretsky, Uretsky, Jack L.
Computer Science · Engineering · Agricultural and Biological Sciences · #Sensor Technology and Measurement Systems #Advanced Measurement and Detection Methods #Advanced Scientific Research Methods
paper · pdf · doi:10.48550/arxiv.0712.4162
I summarize the history of theoretical predictions of, and experimental attempts to measure, pion-pion (S-wave) scattering lengths. Recent measurements at CERN confirm Weinberg's 1966 prediction of the I=2 scattering length and Basdevant and Lee's subsequent correction of the Weinberg I=0 value by inclusion of an S-wave I=0 resonance.