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

TL;DR

This study provides precise measurements of the differential cross sections for Sigma-minus proton elastic scattering across a range of momenta, offering valuable data to refine baryon-baryon interaction models.

Contribution

It presents the first high-statistics, accurately measured differential cross sections for Sigma-minus proton elastic scattering in the specified momentum range.

Findings

Differential cross sections show a clear forward-peaking distribution.

Data covers Sigma-minus momenta from 470 to 850 MeV/c.

Results significantly improve the accuracy of existing scattering data.

Abstract

A high statistics $\Sigma p$ scattering experiment has been performed at the J-PARC Hadron Experimental Facility. Data for momentum-tagged $\Sigma^{-}$ running in a liquid hydrogen target were accumulated by detecting the $\pi^{-}p \to K^{+}\Sigma^{-}$ reaction with a high intensity $\pi^{-}$ beam of 20 M/spill. Differential cross sections of the $\Sigma^{-}p$ elastic scattering were derived with a drastically improved accuracy by identifying the largest statistics of about 4,500 events from 1.72 $\times$ $10^{7}$ $\Sigma^{-}$. The derived differential cross section shows a clear forward-peaking angular distribution for a $\Sigma^{-}$ momentum range from 470 to 850 MeV/$c$. The accurate data will impose a strong constraint on the theoretical models of the baryon-baryon interactions.