Possible explanation of the irregular energy dependence of the rapidity width of ϕ mesons observed in Pb+Pb collisions
- 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.
| Author: | Tom Andre ReichertORCiDGND, Jan SteinheimerORCiDGND, Marcus BleicherORCiDGND |
|---|---|
| URN: | urn:nbn:de:hebis:30:3-863215 |
| URL: | https://arxiv.org/abs/2405.08094v1 |
| DOI: | https://doi.org/10.48550/ARXIV.2405.08094 |
| ArXiv Id: | http://arxiv.org/abs/2405.08094v1 |
| Parent Title (English): | arXiv |
| Publisher: | arXiv |
| Document Type: | Preprint |
| Language: | English |
| Date of Publication (online): | 2024/05/13 |
| Date of first Publication: | 2024/05/13 |
| Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
| Release Date: | 2024/07/21 |
| Issue: | 2405.08094v1 |
| Edition: | Version 1 |
| Page Number: | 5 |
| Institutes: | Physik / Physik |
| Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS) | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Sammlungen: | Universitätspublikationen |
| Licence (German): |  Creative Commons - CC BY - Namensnennung 4.0 International |
