Hadron production ine+e−annihilation at√s =29GeV

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Abstract

Data from the High Resolution Spectrometer at the SLAC storage ring PEP have been used to study the inclusive production of baryons and mesons. Time-of-flight measurements are used to identify the charged hadrons. Neutral hadrons are identified from effective-mass peaks associated with their decay into two charged particles. Cross sections and other inclusive production characteristics are presented for ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$, ${K}^{\ifmmode\pm\else\textpm\fi{}}$, and ${K}^{0}$ (K${\ifmmode\bar\else\textasciimacron\fi{}}^{0}$) mesons, and for the baryons (antibaryons) p (p\ifmmode\bar\else\textasciimacron\fi{}) and \ensuremath{\Lambda} (\ensuremath{\Lambda}\ifmmode\bar\else\textasciimacron\fi{}). The ratio of the inclusive cross section to the point cross section for the ${K}^{0}$ and K${\ifmmode\bar\else\textasciimacron\fi{}}^{0}$ mesons is R(${K}^{0}$,K${\ifmmode\bar\else\textasciimacron\fi{}}^{0}$)=6.15\ifmmode\pm\else\textpm\fi{}0.13\ifmmode\pm\else\textpm\fi{}0.25, and for \ensuremath{\Lambda} and \ensuremath{\Lambda}\ifmmode\bar\else\textasciimacron\fi{}, R(\ensuremath{\Lambda},\ensuremath{\Lambda}\ifmmode\bar\else\textasciimacron\fi{})=0.846\ifmmode\pm\else\textpm\fi{}0.036\ifmmode\pm\else\textpm\fi{}0.085. The neutral-hadron differential cross sections are compared with the predictions of the Lund string model.

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