用ATLAS探测器测量的$\mathbf {\sqrt{s} =}$ 0.9和7 TeV的$pp$碰撞中的两粒子玻色-爱因斯坦关联
Two-particle Bose-Einstein correlations in $pp$ collisions at $\mathbf {\sqrt{s} =}$ 0.9 and 7 TeV measured with the ATLAS detector
摘要：
利用欧洲核子研究中心（CERN）大型强子对撞机上的ATLAS探测器，在质心能量为0.9和7 TeV的质子-质子碰撞中，测量了运动学范围为$p_{\rm T}>$ 100 MeV和$|η|<$ 2.5的同号带电粒子对的玻色-爱因斯坦关联（BEC）。对于0.9 TeV、7 TeV最小偏差和7 TeV高多重性数据样本，积分亮度分别约为7 $μ$ b $^{-1}$、190 $μ$ b $^{-1}$和12.4 nb $^{-1}$。的BEC参数的多重性依赖性特征的相关强度和相关源的大小进行了研究的带电粒子的多重性高达240。使用高多重性7 TeV的数据样本的相关源的大小的多重性依赖的饱和效应。还研究了BEC参数对粒子对平均横动量的依赖关系。
英文摘要：
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 $|η|<$ 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 $μ$b$^{-1}$, 190 $μ$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.
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