TY  - EJOUR
AU  - Gubler, Philipp
AU  - Ichikawa, Masaya
AU  - Song, Taesoo
AU  - Bratkovskaya, Elena
TI  - Production and in-medium modification of ϕ mesons in proton-nucleus reactions from a transport approach
PB  - arXiv
M1  - GSI-2024-01308
PY  - 2024
AB  - Production and in-medium modification of hidden strange ϕ mesons are studied in proton-nucleus reactions - p+C, p+Cu and p+Pb - at 12 GeV/c, partially measured by the KEK E325 collaboration via the dilepton decay mode. This work is based on the off-shell microscopic Parton-Hadron-String Dynamics (PHSD) transport approach, which provides the dynamical description of strongly interacting hadronic and partonic degrees of freedom in dense matter, and especially makes it possible to simulate in-medium off-shell dynamics of the ϕ meson in the reactions studied. Different in-medium scenarios for the modification of the ϕ meson spectral function in nuclear matter are investigated: i) dropping pole mass, ii) collisional broadening and iii) simultaneous dropping pole mass and collisional broadening. Even though the ϕ meson production in p+A reactions occurs only at densities around or below normal nuclear matter density ρ<sub>0</sub>, we find visible modifications of the generated dilepton spectra for the in-medium scenarios compared to the vacuum distribution.
KW  - High Energy Physics - Phenomenology (hep-ph) (Other)
KW  - High Energy Physics - Experiment (hep-ex) (Other)
KW  - Nuclear Experiment (nucl-ex) (Other)
KW  - Nuclear Theory (nucl-th) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/ARXIV.2408.15364
UR  - https://repository.gsi.de/record/354875
ER  -