Differential measurements of jet sub-structure observables and their correlations in p plus p collisions at <mml:msqrt>s</mml:msqrt>=200 GeV in STAR

被引：0

作者：

Robotkova, Monika ^{[1
,2
]}

机构：

[1] CAS, Nucl Phys Inst, Dept Neutron Ion Phys, Husinec Rez 130, Husinec 25068, Czech Republic

[2] Czech Tech Univ, Fac Nucl Sci & Phys Engn, Dept Phys, Brehova 7, Prague 11519, Czech Republic

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS E | 2024年 / 33卷 / 11期

关键词：

Jet; sub-structure; SoftDrop; TEV;

D O I：

10.1142/S0218301324420059

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Jets are collimated sprays of hadrons created by the fragmentation of high energy partons, and can serve as an experimental tool for studying quantum chromodynamics. In particular, we can explore the properties of parton shower and evolution by measuring jet sub-structure. One of the techniques that allows experimental access to the parton shower is the jet grooming technique called SoftDrop. This analysis extends recent measurements of the jet sub-structure observables based on the SoftDrop algorithm, including groomed radius (Rg) and shared momentum fraction (zg), in p+p collisions at s = 200GeV in the STAR experiment. We present fully corrected multi-differential measurements of jet sub-structure observables at the first split and their correlations for jets of different transverse momenta and radii. To further explore the jet sub-structure, we present the first measurement of the jet sub-structure observables at the first, second and third splits via the iterative SoftDrop procedure. We show a strong dependence of the zg on the Rg and the split number with the observation that selecting on narrower opening angles is similar to progressing further along the jet clustering tree. We compare our measurements to the state-of-the-art Monte Carlo models.

引用

页数：8

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