Comment on the Cross Sections of theS,T, andUMesons

Abstract

Absolute cross-section measurements with the CERN-IHEP Boson Spectrometer in the reaction ${\pi }^{-}p\to X^{-}p$ at 11 and 25 GeV/c indicate that the $S$, $T$, $U$ cross sections obtained with the old missing-mass spectrometer (1965/66) at 12 GeV/c have been overestimated by a factor of ∼4. While this does not affect the statistical significance of the peaks, it is important for any comparison with other experiments.