标题： 粒子对玻色-爱因斯坦关联在$pp$碰撞中，于$\mathbf {\sqrt{s} =}$0.9 和 7 TeV 的能量下，由 ATLAS 探测器测量 显示英文标题

标题： Two-particle Bose-Einstein correlations in $pp$ collisions at $\mathbf {\sqrt{s} =}$ 0.9 and 7 TeV measured with the ATLAS detector

摘要： 本文研究了在CERN大型强子对撞机上的ATLAS探测器测量的质子-质子碰撞中，动量范围为$p_{\rm T}>$100 MeV和$|\eta|<$2.5的同号带电粒子对的玻色-爱因斯坦关联（BEC）。中心质量能量分别为0.9 TeV和7 TeV。 积分亮度分别约为7$\mu$b$^{-1}$，190$\mu$b$^{-1}$和12.4 nb$^{-1}$用于0.9 TeV，7 TeV最小截面和7 TeV高多重性数据样本。 研究了表征关联强度和关联源大小的BEC参数对于高达240的带电粒子多重性的依赖关系。 使用高多重性7 TeV数据样本观察到关联源大小的多重性依赖中的饱和效应。 还研究了BEC参数与粒子对平均横向动量的依赖关系。 显示英文摘要

摘要： The paper presents studies of Bose-Einstein Correlations (BEC) for pairs of like-sign charged particles measured in the kinematic range $p_{\rm T}>$ 100 MeV and $|\eta|<$ 2.5 in proton--proton collisions at centre-of-mass energies of 0.9 and 7 TeV with the ATLAS detector at the CERN Large Hadron Collider. The integrated luminosities are approximately 7 $\mu$b$^{-1}$, 190 $\mu$b$^{-1}$ and 12.4 nb$^{-1}$ for 0.9 TeV, 7 TeV minimum-bias and 7 TeV high-multiplicity data samples, respectively. The multiplicity dependence of the BEC parameters characterizing the correlation strength and the correlation source size are investigated for charged-particle multiplicities of up to 240. A saturation effect in the multiplicity dependence of the correlation source size is observed using the high-multiplicity 7 TeV data sample. The dependence of the BEC parameters on the average transverse momentum of the particle pair is also investigated.