Charged Kaon multiplicities of Semi-inclusive DIS off the deuteron target

Abstract

We investigate the results of the charged kaon multiplicities off the deuteron target from HERMES and COMPASS experiments. The discrepancy of the two data sets cannot be explained by different $Q^2$ values. Furthermore we examine the empirical parametrization of the fragmentation functions, DSS2017, and find that the agreement between the theoretical predictions and the HERMES data is less satisfactory as claimed.

Comments: Contributed talk at the XXVI International Workshop on Deep Inelastic Scattering and Related Subjects at Kobe university, Kobe, Japan from April 16 to April 20, 2018