论文标题
LHC Energies的PP和PPB碰撞中的魅力和美容强壮的强体长期相关性的研究
Studies of charm and beauty hadron long-range correlations in pp and pPb collisions at LHC energies
论文作者
论文摘要
提出了提示和非损失d $^0 $介子的第二个方位角分布的第二个傅立叶谐波系数（$ v_2 $）的测量值。非预贴d $^0 $介子来自美容强子腐烂。通过CMS实验分别在13和8.16 TEV的核子核中心能量上收集数据样本。在高度多样性的PP碰撞中，首次报道了$ V_2 $的及时魅力HADRON的信号，发现与横向动量（$ P_ \ Mathrm {T} $）范围为2-6 GEV的浅味强子物种相当。在类似的事件多重性中进行了比较，提示d $^0 $ MESON $ V_2 $在PP中的值和PPB碰撞的幅度相似。 $ v_2 $的开放式美容载体的值首次通过ppb碰撞中的非潜在客户d $^0 $介子提取。对于$ p_ \ mathrm {t} $在2-5 GEV范围内，结果表明，对于非prompt d $^0 $梅森的$ v_2 $小于提示d $^0 $ mesons的$ v_2 $。这些新的测量结果表明，PP碰撞的正魅力$ v_2 $，并暗示PPB系统中的魅力和美容黑人之间的$ v_2 $大规模依赖。这些结果为小型系统中的重风味夸克集体的起源提供了见解。
Measurements of the second Fourier harmonic coefficient ($v_2$) of the azimuthal distributions of prompt and nonprompt D$^0$ mesons produced in pp and pPb collisions are presented. Nonprompt D$^0$ mesons come from beauty hadron decays. The data samples are collected by the CMS experiment at nucleon-nucleon center-of-mass energies of 13 and 8.16 TeV, respectively. In high multiplicity pp collisions, $v_2$ signals for prompt charm hadrons are reported for the first time, and are found to be comparable to those for light-flavor hadron species over a transverse momentum ($p_\mathrm{T}$) range of 2-6 GeV. Compared at similar event multiplicities, the prompt D$^0$ meson $v_2$ values in pp and pPb collisions are similar in magnitude. The $v_2$ values for open beauty hadrons are extracted for the first time via nonprompt D$^0$ mesons in pPb collisions. For $p_\mathrm{T}$ in the range of 2-5 GeV, the results suggest that $v_2$ for nonprompt D$^0$ mesons are smaller than those for prompt D$^0$ mesons. These new measurements indicate a positive charm hadron $v_2$ in pp collisions and suggest a mass dependence in $v_2$ between charm and beauty hadrons in the pPb system. These results provide insights into the origin of heavy-flavor quark collectivity in small systems.
