Measurement of the differential cross sections of the Σ−p elastic scattering in momentum range 470 to 850 MeV/c

Le résumé fourni par la source

A high statistics $\mathrm{\ensuremath{\Sigma}}p$ scattering experiment is performed at the J-PARC Hadron Experimental Facility. Momentum-tagged ${\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}\mathrm{s}$ running in a liquid hydrogen target are accumulated by detecting the ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{K}^{+}{\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ reaction with a high intensity ${\ensuremath{\pi}}^{\ensuremath{-}}$ beam of 20 M/spill. The differential cross sections of the ${\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}p$ elastic scattering were derived with a drastically improved accuracy by identifying approximately 4500 events from $1.72\ifmmode\times\else\texttimes\fi{}{10}^{7}\phantom{\rule{4pt}{0ex}}{\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}$. The derived differential cross section shows a clear forward-peaking angular distribution for a ${\mathrm{\ensuremath{\Sigma}}}^{\ensuremath{-}}$ momentum range from 470 to 850 $\mathrm{MeV}/c$. The accurate data will impose a strong constraint on the theoretical models of the baryon-baryon interactions.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.