Observation of Bs0 mesons and measurement of the Bs0/B+ yield ratio in PbPb collisions at [Formula presented] TeV

The CMS collaboration

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

The Bs0 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 Bs0 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 Bs0 and B+ is measured and compared to theoretical models that include quark recombination effects.

Язык оригиналаанглийский
Номер статьи137062
ЖурналPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Том829
DOI
СостояниеОпубликовано - 10 июн 2022

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ

Fingerprint

Подробные сведения о темах исследования «Observation of Bs0 mesons and measurement of the Bs0/B+ yield ratio in PbPb collisions at [Formula presented] TeV». Вместе они формируют уникальный семантический отпечаток (fingerprint).

Цитировать