تقرير
Possible explanation of the irregular energy dependence of the rapidity width of $\phi$ mesons observed in Pb+Pb collisions
| العنوان: | Possible explanation of the irregular energy dependence of the rapidity width of $\phi$ mesons observed in Pb+Pb collisions |
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| المؤلفون: | Reichert, Tom, Steinheimer, Jan, Bleicher, Marcus |
| سنة النشر: | 2024 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Theory, Nuclear Experiment |
| الوصف: | Experimental data from the NA49 collaboration show an unexpectedly steep rise of the rapidity width of the $\phi$ 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 $\phi$ increases drastically for the highest beam energy. We conclude that the observed steep increase of the $\phi$ rapidity width is a problem of limited detector acceptance and the simplified Gaussian fit approximation. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2405.08094 |
| رقم الأكسشن: | edsarx.2405.08094 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |