论文标题
由$ {\ rm d}^0 $ MESON标记为Proton-Proton Collisions in $ \ sqrt {s} $ = 13 TEV的饰物的测量符号的夹具子结构。
Measurements of groomed-jet substructure of charm jets tagged by ${\rm D}^0$ mesons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
论文作者
论文摘要
了解Parton质量和Casimir颜色因子在量子染色体动力学淋浴中的作用是表征重夸克的发射特性的重要步骤。 JET子结构技术的最新实验进步为隔离和表征来自重夸克的Gluon排放的机会提供了机会。在这项工作中，提出了对魅力分裂函数的第一个直接实验约束，通过测量符合魅力喷气机的第一个分裂的修饰共享动量分数获得，并由重建的$ {\ rm d}^0 $ MESON标记。 The measurement is made in proton-proton collisions at $\sqrt{s}$ = 13 TeV, in the low jet transverse-momentum interval of $15 \leq p_{\rm T}^{\rm jet~ch} < 30$ GeV/$c$ where the emission properties are sensitive to parton mass effects.此外，报道了魅力夸克的第一个扰动发射的开头，以及它经历的扰动排放量。与胶状和光夸克相比，与包含喷气样品样品的测量值的比较表明，魅力夸克的分裂功能较高。魅力夸克（Charm Quarks）在Parton淋浴中的扰动排放量也较少，大角度排放的可能性降低。
Understanding the role of parton mass and Casimir colour factors in the quantum chromodynamics parton shower represents an important step in characterising the emission properties of heavy quarks. Recent experimental advances in jet substructure techniques have provided the opportunity to isolate and characterise gluon emissions from heavy quarks. In this work, the first direct experimental constraint on the charm-quark splitting function is presented, obtained via the measurement of the groomed shared momentum fraction of the first splitting in charm jets, tagged by a reconstructed ${\rm D}^0$ meson. The measurement is made in proton-proton collisions at $\sqrt{s}$ = 13 TeV, in the low jet transverse-momentum interval of $15 \leq p_{\rm T}^{\rm jet~ch} < 30$ GeV/$c$ where the emission properties are sensitive to parton mass effects. In addition, the opening angle of the first perturbative emission of the charm quark, as well as the number of perturbative emissions it undergoes, is reported. Comparisons to measurements of an inclusive-jet sample show a steeper splitting function for charm quarks compared with gluons and light quarks. Charm quarks also undergo fewer perturbative emissions in the parton shower, with a reduced probability of large-angle emissions.
