Studying the in-medium meson spectrum through kaons in proton-nucleus reactions

陽子・原子核反応におけるK中間子を通した媒質中の中間子スペクトルの研究

Balassa, G.*; 青木 和也*; Gubler, P. ; Lee, S. H.*; 佐甲 博之   ; Wolf, G.*

Balassa, G.*; Aoki, Kazuya*; Gubler, P.; Lee, S. H.*; Sako, Hiroyuki; Wolf, G.*

Exploring the mass modifications of mesons in nuclei provides insights into the nature of strongly interacting matter. Specifically, meson mass shifts can be related to the in-medium modification of the strange quark condensate. Therefore, the partial restoration of chiral symmetry can be studied by observing the mass shifts through the decay channels , and . In this paper, we examine the possibility of observing the meson mass modifications of the mesons in 30 GeV proton-nucleus (C, Cu, Pb) collisions, to be studied at the J-PARC E88 experiment, through the kaonic decay channel, with the off-shell Budapest Boltzmann-Uehling-Uhlenbeck (BuBUU) transport model. By applying different mean fields to the kaons, we examine their effects on the invariant mass spectra.