Speaker
Description
The study of inclusive jet and dijet production in small (pp and p--Pb) collision systems is essential to probe the initial state of the collision, constrain PDFs, test pQCD predictions and probe cold nuclear matter (CNM) effects. In addition, recent studies at high multiplicity in small collision systems exhibit signatures of collectivity typically associated with the color-deconfined matter formed in large (heavy-ion) collision systems. However, jet quenching in small collision systems is not observed within current measurement precision, calling for more precise jet measurements in small collision systems. In this talk, we will present recent ALICE measurements of the multiplicity-dependent jet production in pp collisions and jet properties in pp and p-Pb collisions. These results provide new constraints on jet quenching in small systems. Additionally, measurements of jet and dijet production in pp and p—Pb collisions will be shown. The corresponding nuclear modification factor $R_{\rm pPb}$ is extends to lower jet transverse momentum than previously measured at the LHC, constraining hard parton production and fragmentation mechanisms applied in model calculations and the impact of the nuclear-modified parton distribution function (nPDF). To investigate how jet energy is redistributed in cold nuclear matter, the cross-section ratios for different jet resolution parameters ($R$) are compared between pp and p--Pb collisions. Finally, the dijet invariant mass was measured for the first time in pp and p-Pb collisions, which connects to the virtuality of the hard process and provides insight into cold nuclear matter effects.
| What kind of work does this abstract pertain to? | Experimental |
|---|---|
| Which experiment is this abstract related to? | ALICE |
