论文标题
强体生产比率$ f_ \ mathrm {s} / f_ \ mathrm {u} $和$ f_ \ mathrm {d} / f _ \ mathrm {u} $的依赖性测量
Measurement of the dependence of the hadron production fraction ratio $f_\mathrm{s} / f_\mathrm{u}$ and $f_\mathrm{d} / f_ \mathrm{u}$ on B meson kinematic variables in proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
B $ _ \ MATHRM {s}^0 $和B $^+$ HADRON生产分数之间的比率的依赖性，$ f_ \ Mathrm {s} / f_ \ Mathrm {u} $，在横向动量上B $ _ \ MATHRM {S}^0 $ $ \ to $ J $/ψ\，ϕ $和B $^+$ \ \ $ $ \ to $ j $/ψ$ k $^+$。该分析使用CMS实验收集的质子 - 质子碰撞的数据样本，该质子质量碰撞在2018年收集，对应于61.6 fb $^{ - 1} $的综合发光度。观察到$ f_ \ mathrm {s} / f_ \ mathrm {u} $比率取决于b $ p_ \ mathrm {t} $，并且要与在大的$ p_ \ p_ \ mathrm {t} $上渐近地稳定。未观察到速度依赖性。 B $^0 $与B $^+$强体生产分数的比率，$ f_ \ Mathrm {d} / f_ \ mathrm {u} $，使用b $^0 $^0 $ $^0 $ $ \ to $ j $ j $ /ψ$ k $ k $ k $ k $^{0} $ decay Channel and Internity和$ p_ and $ p_ a n anditive and and and p_等音不变性。
The dependence of the ratio between the B$_\mathrm{s}^0$ and B$^+$ hadron production fractions, $f_\mathrm{s} / f_\mathrm{u}$, on the transverse momentum ($p_\mathrm{T}$) and rapidity of the B mesons is studied using the decay channels B$_\mathrm{s}^0$ $\to$ J$/ψ\,ϕ$ and B$^+$ $\to$ J$/ψ$ K$^+$. The analysis uses a data sample of proton-proton collisions at a center-of-mass energy of 13 TeV, collected by the CMS experiment in 2018 and corresponding to an integrated luminosity of 61.6 fb$^{-1}$. The $f_\mathrm{s} / f_\mathrm{u}$ ratio is observed to depend on the B $p_\mathrm{T}$ and to be consistent with becoming asymptotically constant at large $p_\mathrm{T}$. No rapidity dependence is observed. The ratio of the B$^0$ to B$^+$ hadron production fractions, $f_\mathrm{d} / f_\mathrm{u}$, measured using the B$^0$ $\to$ J$/ψ$ K$^{*0}$ decay channel, is found to be consistent with unity and independent of $p_\mathrm{T}$ and rapidity, as expected from isospin invariance.
