Measurement of inclusive jet cross section and substructure in p+p collisions at √(s__NN)=200 GeV

PHENIX Collaboration,N. J. Abdulameer，S. Zhou,L. Zou

arXiv · Experiment（2024）

Cited 0|Views22

Abstract

The jet cross-section and jet-substructure observables in p+p collisions at √(s)=200 GeV were measured by the PHENIX Collaboration at the Relativistic Heavy Ion Collider (RHIC). Jets are reconstructed from charged-particle tracks and electromagnetic-calorimeter clusters using the anti-k_t algorithm with a jet radius R=0.3 for jets with transverse momentum within 8.0

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【要点】：本文通过PHENIX实验在RHIC上测量了√(s__NN)=200 GeV的p+p碰撞中的喷注横截面积和喷注子结构观测量，发现喷注中的粒子多重度低于现有模型预测，对未来的喷注测量具有指导意义。

【方法】：使用anti-k_t算法和R=0.3的喷注半径，通过重建带电粒子轨迹和电磁量能器簇，对喷注进行测量。

【实验】：在RHIC的PHENIX实验中，对8.0<p_T<40.0 GeV/c和|η|<0.15的喷注进行了测量，数据集包括喷注横截面积、SoftDrop-groomed动量分数(z_g)、相对于喷注轴的带电粒子横向动量(j_T)和带电粒子在喷注内的径向分布(r)，以及ξ=-ln(z)的分布。实验结果与理论NLO和NNLO计算、PYTHIA事件生成器以及其他实验结果进行了比较。

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