Measurement of Hadron Production in ${\pi }^{-}$-C Interactions at 158 and 350 GeV/c with NA61/SHINE at the CERN SPS

We present a measurement of the momentum spectra of ${\pi }^{\pm }$, K${}^{\pm }$, p${}^{\pm }$, $\mathrm{\Lambda }$, $\bar{\mathrm{\Lambda }}$ and K${}_S^0$ produced in interactions of negatively charged pions with carbon nuclei at beam momenta of 158 and 350 GeV/c. The total production cross sections are measured as well. The data were collected with the large-acceptance spectrometer of the fixed target experiment NA61/SHINE at the CERN SPS. The obtained double-differential $p$-$p_T$ spectra provide a unique reference data set with unprecedented precision and large phase-space coverage to tune models used for the simulation of particle production in extensive air showers in which pions are the most numerous projectiles.