- Open Access
Inclusive jet cross section in collisions at and 510 GeV
Phys. Rev. D 114, 072003 – Published 7 October, 2026
DOI: https://doi.org/10.1103/2fyx-y5hr
Abstract
Jets are collimated clusters of particles formed by the hadronization of partons following a hard interaction. In proton-proton () collisions at the Relativistic Heavy Ion Collider (RHIC), jet production is dominated by and partonic processes, allowing us to directly probe the gluon parton distribution function (PDF) in the proton in a way complementary to deep inelastic scattering. In this paper, we report the double-differential inclusive jet cross sections as a function of jet transverse momentum, , and pseudorapidity, , at center-of-mass energies and 510 GeV, from collisions studied with the STAR detector. The jet is corrected for underlying event contributions by applying an off-axis cone method. At mid-pseudorapidity, , the kinematic coverage of our data extends to and at and 510 GeV, respectively, where the gluon PDF is poorly constrained by the TeV-scale () colliders. The inclusive jet cross sections are compared to the next-to-next-to-leading-order perturbative quantum chromodynamics calculations using several recent PDF sets as inputs. These results will further constrain the gluon PDF, help tune Monte Carlo generators, and provide critical reference data needed to study the quark-gluon plasma.
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