High-z proton and kaon multiplicity ratios on deuteron target

Apr 9, 2019, 2:00 PM
17m
Rettorato - Aula Principi d'Acaja

Rettorato - Aula Principi d'Acaja

via Verdi, 8 Turin
Parallel Session Talk WG6: Spin and 3D structure WG6: Spin and 3D structure

Speaker

Marcin Stolarski (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part)

Description

Recently COMPASS has reported unexpected results concerning K− over K+ multiplicity ratio for kaons produced in DIS with a large fraction of the virtual-photon energy, PLB 786 (2018) 390. The obtained ratio is significantly below the lower limit given by NLO pQCD.

In order to provide more information about the observed phenomenon we will show for the first time results concerning pbar over p multiplicity ratio for protons produced in DIS with a large fraction of the virtual-photon energy. In addition the kaon multiplicity ratio will be presented in an extended kinematic phase-space with respect to the one used in the aforementioned paper.

Primary authors

Marcin Stolarski (LIP Laboratorio de Instrumentacao e Fisica Experimental de Part) COMPASS Collaboration

Presentation materials