论文标题
用$ {\ rm d^0}标记的魅力喷气机的生产的测量
Measurement of the production of charm jets tagged with ${\rm D^0}$ mesons in pp collisions at $\sqrt{s}$ = 5.02 and 13 TeV
论文作者
论文摘要
通过在Jet组成部分中存在$ {\ rm d^0} $梅森的魅力喷气机的生产的测量，在Proton-Proton碰撞中以$ \ sqrt {S} $ = 5.02 $ = 5.02和13 Tev的质子质量碰撞，与Alice detector一起在Cern Lhc中。 $ {\ rm d^0} $介子是从其HADRONIC DECAY $ {\ rm d^0} \ rightArrow {\ rm k^ - }π^+$和相应的电荷结合中重建的。喷气机的重建是从$ {\ rm d^0} $ - 使用抗$ k _ {\ rm t} $算法的候选候选者和充电颗粒，在喷气式横向动量范围$ 5 <p _ {\ rm t; rm t; chjet} <50 $ gev/$ c $ c $，pse $，psse $ judorapity rm | | | | | | | | <0.9-r $，并带有JET分辨率参数$ r $ = 0.2，0.4，0.6。用$ {\ rm d^0} $ Meson沿喷气轴（$ z^{\ rm ch} _ {|||} $）携带的喷气动量分数的分布在$ 0.4 <z^{\ z^{\ rm ch} _ {| rm ch} _ {|| {|| {|| || || || | | | | | | | | | | | | | | |} <1.0 $ 0.4 <z^{||} <1.0 <1.0 $ in the 4 ranges of the jet transverse amens comment的范围内的分布。还提供了不同碰撞能和喷气分辨率参数的结果的比较。将测量结果与基于蒙特卡洛事件发生器的预测，基于领先和临近领导的扰动量子染色体动力学计算。尽管在低$ p _ {\ rm t; chjet} $下有一些差异，但对数据的主要特征的总体描述通常很好地描述。还以$ r = 0.3 $在$ \ sqrt {s} $ = 5.02 tev进行测量，并在本文附录中显示了与理论预测的比较。
The measurement of the production of charm jets, identified by the presence of a ${\rm D^0}$ meson in the jet constituents, is presented in proton-proton collisions at centre-of-mass energies of $\sqrt{s}$ = 5.02 and 13 TeV with the ALICE detector at the CERN LHC. The ${\rm D^0}$ mesons were reconstructed from their hadronic decay ${\rm D^0} \rightarrow {\rm K^-}π^+$ and the respective charge conjugate. Jets were reconstructed from ${\rm D^0}$-meson candidates and charged particles using the anti-$k_{\rm T}$ algorithm, in the jet transverse momentum range $5<p_{\rm T;chjet}<50$ GeV/$c$, pseudorapidity $|η_{\rm jet}| <0.9-R$, and with the jet resolution parameters $R$ = 0.2, 0.4, 0.6. The distribution of the jet momentum fraction carried by a ${\rm D^0}$ meson along the jet axis ($z^{\rm ch}_{||}$) was measured in the range $0.4 < z^{\rm ch}_{||} < 1.0$ in four ranges of the jet transverse momentum. Comparisons of results for different collision energies and jet resolution parameters are also presented. The measurements are compared to predictions from Monte Carlo event generators based on leading-order and next-to-leading-order perturbative quantum chromodynamics calculations. A generally good description of the main features of the data is obtained in spite of a few discrepancies at low $p_{\rm T;chjet}$. Measurements were also done for $R = 0.3$ at $\sqrt{s}$ = 5.02 TeV and are shown along with their comparisons to theoretical predictions in an appendix to this paper.
