Speaker
Description
Beauty quarks are unique probes for studying quark-gluon plasma (QGP) properties. One of the most important issues and limiting factors in understanding their energy loss and diffusion in the QGP is their hadronization. Additionally, whether they experience energy loss in the smallest systems remains an open question. We present newresults on the nuclear modification factors ($R_\mathrm{AA}$) of $\mathrm{B}_\mathrm{s}^{0}$ and $\mathrm{B}^{+}$ mesons in proton-proton and lead-lead collisions at 5.02 TeV, and the $\mathrm{B}^{+}$ meson in proton-lead (pPb) collisions at 8.16 TeV, using CMS detector data. These measurements span an extended transverse momentum range and different charged particle multiplicities, shedding light on beauty quark diffusion, energy loss, and hadronization mechanisms. The results in pPb collisions are in agreement with fixed-order next-to-leading logarithmic calculations, and the results in the highest multiplicity pPb collisions show no suppression or enhancement due to medium effects within the current precision. Additionally, we compared the $\mathrm{B}^{+}$ and $\mathrm{B}_\mathrm{s}^{0}$ $R_\mathrm{AA}$ results with $\mathrm{B}_\mathrm{c}^{+}$ meson results, observed for the first time in nucleus-nucleus collisions, suggesting enhanced $R_\mathrm{AA}$ via recombination of beauty and charm quarks, which is larger than that between beauty and strange quarks.
| Category | Experiment |
|---|---|
| Collaboration | CMS |
