2020/12/11 by T. Truhlar, Truhlar, Tomas
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2012.06295
openalex publication_date 2020/12/11 · openalex created_date 2022/07/25 · openalex updated_date 2026/07/28
We report on the measurement of the central exclusive production process pp → pXp in proton-proton collisions at RHIC with the STAR detector at √(s) = 510 GeV. At this energy, this process is dominated by a double Pomeron exchange mechanism. The tracks of the centrally produced system X were reconstructed in the central detector of STAR, the Time Projection Chamber and the Time of Flight systems, and were identified using the ionization energy loss and the time of flight method. The diffractively scattered protons, moving intact inside the RHIC beam pipe after the collision, were measured in the Roman Pots system allowing full control of the interaction's kinematics and verification of its exclusivity. The preliminary results on the invariant mass distributions of centrally produced π+ π-, K+ K- and p p pairs measured within the STAR acceptance are presented.