Measurement of the nuclear multiplicity ratio for $K_s^0$ hadronization at CLAS

Abstract

The influence of cold nuclear matter on lepto-production of hadrons in semi-inclusive deep inelastic scattering is measured using the CLAS detector in Hall B at Jefferson Lab and a 5.014 GeV electron beam. We report the $K_s^0$ multiplicity ratios for targets of C, Fe, and Pb relative to deuterium as a function of the fractional virtual photon energy $z$ transferred to the $K_s^0$ and the transverse momentum squared $p_T^2$ of the $K_s^0$. We find that the multiplicity ratios for $K_s^0$ are reduced in the nuclear medium at high $z$ and low $p_T^2$, with a trend for the $K_s^0$ transverse momentum to be broadened in the nucleus for large $p_T^2$.

Submitted to Phys. Lett. B