Speaker
Description
The ALICE Collaboration reports a search for jet quenching effects in high multiplicity pp collisions at $\sqrt{s}$ = 13 TeV, utilizing the semi-inclusive distribution of charged-particle jets recoiling from a high transverse momentum charged-hadron trigger. The multiplicity is measured using forward scintillation detectors that are separated in phase-space from the central region where the trigger and jet are measured. A data-driven statistical method is used to correct for uncorrelated jet background, which includes multi-partonic interactions. This trigger-normalized coincidence approach does not require the association of event activity with collision geometry in order to measure jet quenching, in contrast to inclusive observables, and has been used to set a stringent limit on jet quenching effects in high-multiplicity p--Pb collisions at the LHC. The magnitude of jet quenching is quantified by comparing recoil jet distributions for low and high-multiplicity pp collisions.
