TY  - INPR
A1  - Reichert, Tom Andre
A1  - Steinheimer, Jan
A1  - Bleicher, Marcus
T1  - Possible explanation of the irregular energy dependence of the rapidity width of ϕ mesons observed in Pb+Pb collisions
T2  - arXiv
N2  - Experimental data from the NA49 collaboration show an unexpectedly steep rise of the rapidity width of the ϕ meson as function of beam energy, which was suggested as possible interesting signal for novel physics. In this work we show that the Ultra-relativistic Quantum-Molecular-Dynamics (UrQMD) model is able to reproduce the shapes of the rapidity distributions of most measured hadrons and predicts a common linear increase of the width for all hadrons. Only when following the exact same analysis technique and experimental acceptance of the NA49 and NA61/SHINE collaborations, we find that the extracted value of the rapidity width of the ϕ increases drastically for the highest beam energy. We conclude that the observed steep increase of the ϕ rapidity width is a problem of limited detector acceptance and the simplified Gaussian fit approximation.
Y1  - 2024
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/86321
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-863215
UR  - https://arxiv.org/abs/2405.08094v1
IS  - 2405.08094v1
PB  - arXiv
ER  -