Speaker
Description
COMPASS has recently published results on pion and kaon colinear multiplicities measured on a proton target in Physical Review D 112 (2025) 012002. One of the key improvements over previous COMPASS analyses is a more accurate treatment of radiative corrections using the DJANGOH Monte Carlo generator. Compared to the previously used method, relative differences up to 10% are observed at the level of the multiplicities.
Due to the non-negligible impact of these corrections, the COMPASS Collaboration decided to update the deuteron-target multiplicity data, originally published in 2016, using the new radiative-correction procedure. The updated results have been submitted for publication in Physics Letters B.
At the conference, we shall present a final set of multiplicity values for both deuteron and proton targets. These results will serve as important input for global fits of fragmentation functions, as well as for combined fits of fragmentation functions and parton distribution functions.
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