Measurement of inclusive jet production and nuclear modifications in pPb collisions at sqrt(s[NN]) = 5.02 TeV

TL;DR

This study measures inclusive jet production in proton-lead collisions at 5.02 TeV, finding minimal nuclear modifications consistent with perturbative QCD predictions, and provides detailed spectra across multiple pseudorapidity ranges.

Contribution

First detailed measurement of inclusive jet spectra and nuclear modifications in pPb collisions at 5.02 TeV across various pseudorapidities, confirming small nuclear effects as predicted.

Findings

Jet spectra show no significant asymmetry between forward and backward pseudorapidities.

Nuclear modifications are small and align with perturbative QCD predictions.

Results provide baseline data for understanding nuclear effects in high-energy collisions.

Abstract

Inclusive jet production in pPb collisions at a nucleon-nucleon (NN) center-of-mass energy of sqrt(s[NN]) = 5.02 TeV is studied with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 35 inverse nanobarns is analyzed. The jet transverse momentum spectra are studied in seven pseudorapidity intervals covering the range -2.0 < eta[CM] < 1.5 in the NN center-of-mass frame. The jet production yields at forward and backward pseudorapidity are compared and no significant asymmetry about eta[CM] = 0 is observed in the measured kinematic range. The measurements in the pPb system are compared to reference jet spectra obtained by extrapolation from previous measurements in pp collisions at sqrt(s) = 7 TeV. In all pseudorapidity ranges, nuclear modifications in inclusive jet production are found to be small, as predicted by next-to-leading order perturbative QCD calculations that incorporate nuclear effects in the parton distribution functions.