Direct photon production and jet energy-loss in small systems

الأصل · EN

Two types of penetrating probes, direct photon and QCD jets, are investigated in the background of a small and rapidly expanding droplet of quark-gluon plasma. The additional thermal electromagnetic radiation results in a 50% enhancement of the direct photons. In high multiplicity p+Pb collisions, jets can lose a sizeable fraction of their initial energy, leading to a charged hadron RₚA of 0.8 at a transverse momentum around 10GeV. Those two proposed measurements can help understand the apparent collective behaviour observed in small collision systems.