Abstract
The Bs 0 and B+ production yields are measured in PbPb collisions at a center-of-mass energy per nucleon pair of 5.02 TeV. The data sample, collected with the CMS detector at the LHC, corresponds to an integrated luminosity of 1.7 nb−1. The mesons are reconstructed in the exclusive decay channels B→s0J/ψ(μ+μ−)ϕ(K+K−) and B→+J/ψ(μ+μ−)K+, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The Bs 0 meson is observed with a statistical significance in excess of five standard deviations for the first time in nucleus-nucleus collisions. The measurements are performed as functions of the transverse momentum of the B mesons and of the PbPb collision centrality. The ratio of production yields of Bs 0 and B+ is measured and compared to theoretical models that include quark recombination effects.
Keywords
B mesons, CMS, Hadronization, Heavy flavor, Quark gluon plasma
DOI Link
Publication Date
2022-06-10
Publication Title
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume
829
ISSN
0370-2693
Deposit Date
2026-07-13
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Additional Links
Recommended Citation
CMS Collaboration., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., Erö, J., Escalante Del Valle, A., Frühwirth, R., Jeitler, M., Krammer, N., Lechner, L., Liko, D., Madlener, T., Mikulec, I., Pitters, F., Rad, N., Schieck, J., Schöfbeck, R., Spanring, M., Templ, S., Waltenberger, W., Wulz, C., Zarucki, M., Chekhovsky, V., Litomin, A., Makarenko, V., Suarez Gonzalez, J., Darwish, M., De Wolf, E., & Di Croce, D. (2022) 'Observation of Bs 0 mesons and measurement of the Bs 0/B+ yield ratio in PbPb collisions at [Formula presented] TeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 829. Available at: 10.1016/j.physletb.2022.137062