Modification of jet structure in high-multiplicity pp collisions due to multiple-parton interactions and observing a multiplicity-independent characteristic jet size

Abstract

We study the multiplicity dependence of jet structures in pp collisions using Monte Carlo event generators. We give predictions for multiplicity-differential jet structures and present evidence for a non-trivial jet shape dependence on charged hadron event multiplicity, that can be used as a sensitive tool to experimentally differentiate between equally well-preforming simulation tunes. We also propose a way to validate the presence and extent of effects such as multiple parton interactions (MPI) or color reconnection (CR), based on the detection of non-trivial jet shape modification in high-multiplicity events at high pT. Using multiplicity-dependent jet structure observables in various pT windows might also help understanding the interplay between jet particles and the underlying event (UE). We introduce a multiplicity-independent characteristic jet size measure, and use a simplistic model to aid its physical interpretation.

arXiv comment11 pages, 12 figures

References in corpus (23)

• The anti-k_t jet clustering algorithm
• An Introduction to PYTHIA 8.2
• FastJet user manual
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• Successive Combination Jet Algorithm For Hadron Collisions
• Better Jet Clustering Algorithms
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
• Parton distributions with QED corrections
• General-purpose event generators for LHC physics
• String Formation Beyond Leading Colour
• Interleaved Parton Showers and Tuning Prospects
• On the Unification of Couplings in the Minimal Supersymmetric Standard Model
• Jet Flavor Classification in High-Energy Physics with Deep Neural Networks
• Large Jets at Hadron Colliders at Order ${\alpha }_s^3$: A Look Inside
• Jet Shapes in Hadron Collisions: Higher Orders, Resummation and Hadronization
• Effects of color reconnection on $t\bar{t}$ final states at the LHC
• Mass ordering of spectra from fragmentation of saturated gluon states in high multiplicity proton-proton collisions
• Universal fluctuation-driven eccentricities in proton-proton, proton-nucleus and nucleus-nucleus collisions
• Measurement of charged pion, kaon, and proton production in proton-proton collisions at sqrt(s) = 13 TeV
• Measurement of Internal Jet Structure in Dijet Production in Deep-Inelastic Scattering at HERA
• Jet and underlying event properties as a function of particle multiplicity in proton-proton collisions at sqrt(s) = 7 TeV
• Observables for possible QGP signatures in central pp collisions

Cited by in corpus (8)

• KNO-like scaling within a jet in proton--proton collisions at LHC energies
• Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp($\overline{\text{p}}$) collisions
• Jet Structure Studies in Small Systems
• Multiplicity Dependence of the Jet Structures in pp Collisions at LHC Energies
• Multiplicity dependence of charged-particle intra-jet properties in pp collisions at $\sqrt{s}$ = 13 TeV
• The partonic origin of multiplicity scaling in heavy and light flavor jets
• Defining the Underlying-Event Activity in the Presence of Heavy-Flavour Processes in Proton-Proton Collisions at LHC Energies
• Probing the interaction of semi-hard quarks and gluons with the underlying event in light- and heavy-flavor triggered proton-proton collisions