# Measurement of splittings along a jet shower in $\sqrt{s} = 200$ GeV pp collisions at STAR

### Submission summary

 As Contributors: Raghav Kunnawalkam Elayavalli Preprint link: scipost_202107_00089v1 Date submitted: 2021-07-30 14:38 Submitted by: Kunnawalkam Elayavalli, Raghav Submitted to: SciPost Physics Proceedings Proceedings issue: DIS2021 Academic field: Physics Specialties: Gravitation, Cosmology and Astroparticle Physics High-Energy Physics - Experiment Approach: Experimental

### Abstract

Jets are algorithmic proxies of hard scattered partons, i.e. quarks and gluons, in high energy particle collisions. The STAR collaboration presents the first measurements of substructure observables at the first, second and third splits in the jet clustering tree via the iterative SoftDrop procedure. For each of these splits, we measure the fully corrected groomed shared momentum fraction (\zg) and groomed jet radius (\rg). We discuss the evolution of jet substructure in both the angular and momentum scales which allows for a self-similarity test of the DGLAP splitting function. We compare the fully corrected data to Monte Carlo models, providing stringent constraints on model parameters related to the parton shower and non-perturbative effects such as hadronization.

###### Current status:
Editor-in-charge assigned