论文标题
与爱丽丝PP碰撞中的喷气子结构
Jet substructure in pp collisions with ALICE
论文作者
论文摘要
在大型强子对撞机（LHC）的实验中使用了JET子结构可观察力，以搜索新物理学以及研究量子染色体动力学（QCD）中的扰动和非扰动过程。一些可观察到的红外线和共线安全，因此很容易与第一原理计算相媲美，而另一些则可以直接洞悉特定的物理现象，例如重型离子碰撞中形成的夸克 - 胶原等离子体。 Alice跟踪系统的高精度能力使LHC Energies的独特机会可以测量具有低横向动量的轨道，从而可以高精度访问具有出色的角度分辨率的Jets内部较软的组件。我们介绍了与爱丽丝PP碰撞相撞的一些充电粒子射流子结构测量值，包括广义射流角度，角射流轴差异以及使用原代隆德平面在QCD中直接观察死孔效应。这些结果通过将爱丽丝测量值与来自不同事件发生器和扰动QCD计算的预测进行比较，为喷气机的演变提供了新的见解。
Jet substructure observables have been used by experiments at the Large Hadron Collider (LHC) as instruments to search for new physics as well as to study perturbative and nonperturbative processes in quantum chromodynamics (QCD). Some observables are infrared and collinear safe and thus easily comparable to first-principles calculations, while others offer direct insight into specific physical phenomena such as the quark-gluon plasma formed in heavy-ion collisions. The high-precision capability of the ALICE tracking system allows a unique opportunity at LHC energies to measure tracks with low transverse momentum, permitting high precision access to the softer components inside jets with an excellent angular resolution. We present some recent charged-particle jet substructure measurements in pp collisions with ALICE, including the generalized jet angularities, the angular jet axes differences, and the direct observation of the dead-cone effect in QCD using the primary Lund Plane. These results provide new insights into the evolution of jets by comparing ALICE measurements to predictions from different event generators and perturbative QCD calculations.
