The multiplicity dependence of electron production from heavy-flavour hadron decays as a function of transverse momentum was measured in p–Pb collisions at √ sNN = 5.02 TeV using the ALICE detector at the LHC. The measurement was performed in the centre-of-mass rapidity interval −1.07 < ycms < 0.14 and transverse momentum interval 2 < pT < 16 GeV/c. The multiplicity dependence of the production of electrons from heavy-flavour hadron decays was studied by comparing the pT spectra measured for different multiplicity classes with those measured in pp collisions (QpPb) and in peripheral p–Pb collisions (Qcp). The QpPb results obtained are consistent with unity within uncertainties in the measured pT interval and event classes. This indicates that heavy-flavour decay electron production is consistent with binary scaling and independent of the geometry of the collision system. Additionally, the results suggest that cold nuclear matter effects are negligible within uncertainties, in the production of heavy-flavour decay electrons at midrapidity in p–Pb collisions. ∗See Appendix A for the list of collaboration members ar X iv :1 91 0. 14 39 9v 1 [ nu cl -e x] 3 1 O ct 2 01 9 Electrons from heavy-flavour hadron decays as a function of multiplicity ALICE Collaboration

中文翻译：

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在 sNN$$\sqrt{s_{\mathrm{NN}}} $$ = 5.02 TeV 处，重味强子的电子衰变作为 p-Pb 碰撞多重性的函数

使用 LHC 上的 ALICE 探测器，在 √ sNN = 5.02 TeV 下的 p-Pb 碰撞中测量了重味强子衰变产生的电子的多样性与横向动量的函数关系。测量在质心快速间隔 -1.07 < ycms < 0.14 和横向动量间隔 2 < pT < 16 GeV/c 中进行。通过比较不同多重性类别测量的 pT 光谱与 pp 碰撞 (QpPb) 和外围 p-Pb 碰撞 (Qcp) 中测量的光谱，研究了重味强子衰变产生电子的多重性依赖性。获得的 QpPb 结果与测量的 pT 间隔和事件类别的不确定性一致。这表明重味衰变电子的产生与二元缩放一致并且与碰撞系统的几何形状无关。此外，结果表明，在 p-Pb 碰撞中以中等速度产生重味衰变电子时，冷核物质的影响在不确定性范围内可以忽略不计。∗参见附录 A 中的合作成员名单 ar X iv :1 91 0. 14 39 9v 1 [ nu cl -ex] 3 1 O ct 2 01 9 来自重味强子衰变的电子作为多样性的函数 ALICE Collaboration