The B 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 and B, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The B 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 B and B+ is measured and compared to theoretical models that include quark recombination effects.
(2022). Observation of Bs0 mesons and measurement of the Bs0/B+ yield ratio in PbPb collisions at TeV [journal article - articolo]. In PHYSICS LETTERS. SECTION B. Retrieved from http://hdl.handle.net/10446/216177
Observation of Bs0 mesons and measurement of the Bs0/B+ yield ratio in PbPb collisions at TeV
Re, V.;Vai, I.;
2022-01-01
Abstract
The B 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 and B, in the transverse momentum range 7–50 GeV/c and absolute rapidity 0–2.4. The B 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 B and B+ is measured and compared to theoretical models that include quark recombination effects.File | Dimensione del file | Formato | |
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