Measurement of charged-particle event shape variables in inclusive ( s ) = 7 TeV proton-proton interactions with the ATLAS detector
Measurement of charged-particle event shape variables in inclusive ( s ) = 7 TeV proton-proton interactions with the ATLAS detector
复制标题
使用 ATLAS 探测器测量 ( s ) = 7 TeV 质子-质子相互作用中的带电粒子事件形状变量
DOI：
10.1103/physrevd.88.032004
复制
发表时间：
2013
影响因子：
5
通讯作者：
Aad G
中科院分区：
文献类型：
--
作者：
Aad G
带电粒子事件形状变量的测量通过 LHC 的 ATLAS 探测器在 7 TeV 质心能量的包容性非弹性碰撞中进行。研究的可观测量是横向推力、推力次要和横向球度，每个都使用垂直于束流方向的最终状态带电粒子的动量分量来定义。通过最小偏置触发器选择具有至少六个带电粒子的事件。除了微分分布之外，还给出了每个事件形状变量作为主导带电粒子横向动量、带电粒子多重性和横向动量总和的函数的演化。多个蒙特卡罗模型的预测显示与数据存在显着偏差。
The measurement of charged-particle event shape variables is presented in inclusive inelasticcollisions at a center-of-mass energy of 7 TeV using the ATLAS detector at the LHC. The observables studied are the transverse thrust, thrust minor, and transverse sphericity, each defined using the final-state charged particles’ momentum components perpendicular to the beam direction. Events with at least six charged particles are selected by a minimum-bias trigger. In addition to the differential distributions, the evolution of each event shape variable as a function of the leading charged-particle transverse momentum, charged-particle multiplicity, and summed transverse momentum is presented. Predictions from several Monte Carlo models show significant deviations from data.