论文标题
在$ \ sqrt {s} = $ 13 tev的proton-proton碰撞中，用魅力或底部夸克喷射的Z玻色子的相关生产的测量
Measurement of the associated production of a Z boson with charm or bottom quark jets in proton-proton collisions at $\sqrt{s} =$ 13 TeV
论文作者
论文摘要
横截面的比例，$σ$（z+c喷气机） / $σ$（z+jet），$σ$（z+b jets） / $σ$（z+jets）和$σ$（z+c jets） / $σ$（z+b jets）在与Z Boson的生产中至少与一个Charm coll coll coll coll coll coll coll coll coll ot to prouts at prouts at prot prouts protin相关$ \ sqrt {s} = $ 13 tev。 CMS实验在CERN LHC收集的数据样本对应于35.9 fb $^{ - 1} $的集成发光度，其基础量为$ P_ \ Mathrm {t} $ $> $ $> $ 30 GEV和$ | $ | $ $ $ <$ $ <$ p_ \ p_ \ nmater和$ p_ \ nmatrm和$ p_ \ nmatrm and $ p_ \ $ \ $ {分别为假性。 Z Boson的候选者来自Leptonic的衰减，以$ P_ \ Mathrm {T} $ $> $ 25 GEV和$ |η| $ $ <$ <$ <$ <$ <$ <$ <$ <$ <$ <$ \ lt $ \ lt $ $ $ $ m_ \ mathrm {z {z} $ $ $ \ $ \ lt $ 111 gev。测量值为$σ$（z+c射流） / $σ$（z+jets）= 0.102 $ \ pm $ 0.002 $ \ pm $ 0.009，$σ$（z+b jets） / $σ$（z+jets）= 0.0633 $ 0.0633 $ \ pm $ 0.0004 $ 0.0004 $ 0.0004 $ \ $ 0.0015 $ qet（z+c jets $ c） = 1.62 $ \ pm $ 0.03 $ \ pm $ 0.15。将包含和差异横截面比例作为JET和Z玻色子横向动量的功能的结果与前导和领导级扰动量子染色体动力学计算的预测进行了比较。这些是13 tev处的横截面比率的第一个测量。
Ratios of cross sections, $σ$(Z+c jets) / $σ$(Z+jets), $σ$(Z+b jets) / $σ$(Z+jets), and $σ$(Z+c jets) / $σ$(Z+b jets) in the associated production of a Z boson with at least one charm or bottom quark jet are measured in proton-proton collisions at $\sqrt{s} =$ 13 TeV. The data sample, collected by the CMS experiment at the CERN LHC, corresponds to an integrated luminosity of 35.9 fb$^{-1}$, with a fiducial volume of $p_\mathrm{T}$ $>$ 30 GeV and $|η|$ $<$ 2.4 for the jets, where $p_\mathrm{T}$ and $η$ represent transverse momentum and pseudorapidity, respectively. The Z boson candidates come from leptonic decays into electrons or muons with $p_\mathrm{T}$ $>$ 25 GeV and $|η|$ $<$ 2.4, and the dilepton mass satisfies 71 $\lt$ $m_\mathrm{Z}$ $\lt$ 111 GeV. The measured values are $σ$(Z+c jets) / $σ$(Z+jets) = 0.102 $\pm$ 0.002 $\pm$ 0.009, $σ$(Z+b jets) / $σ$(Z+jets) = 0.0633 $\pm$ 0.0004 $\pm$ 0.0015, and $σ$(Z+c jets) / $σ$(Z+b jets) = 1.62 $\pm$ 0.03 $\pm$ 0.15. Results on the inclusive and differential cross section ratios as functions of jet and Z boson transverse momentum are compared with predictions from leading and next-to-leading order perturbative quantum chromodynamics calculations. These are the first measurements of the cross section ratios at 13 TeV.
