Measurements of the inclusive jet cross section and jet fragmentation in pp collisions with the ALICE experiment at the LHC

TL;DR

This paper reports measurements of inclusive jet cross sections and jet fragmentation in proton-proton collisions at the LHC, providing essential references for understanding jet behavior in heavy-ion collisions and testing theoretical models.

Contribution

It presents the first measurements of inclusive jet cross sections at 2.76 TeV and jet fragmentation at 7 TeV in pp collisions using ALICE, serving as benchmarks for future heavy-ion studies.

Findings

Jet cross section measured at 2.76 TeV

Jet fragmentation functions measured at 7 TeV

Results compared with theoretical models and simulations

Abstract

Jet reconstruction and jet fragmentation variables provide important information to study the interaction between hard scattered partons and the Quark-Gluon Plasma. This paper presents the measurement of the inclusive cross section for fully reconstructed jets in pp collisions at sqrt(s) = 2.76 TeV, which provides an essential reference for jet measurements in Pb-Pb collisions at the same sqrt(s_NN). In addition, we report jet fragmentation measurements for charged particle jets in pp collisions at sqrt(s) = 7 TeV. These measurements utilize the ALICE central barrel tracking system to detect charged particles with good efficiency above 150 MeV/c, together with the Electromagnetic Calorimeter (EMCal). The jet cross section and fragmentation measurements are compared to theoretical calculations and Monte Carlo generators.