Monte Carlo study of particle production in diffractive proton-proton collisions at s\sqrt s = 13 TeV with the very forward detector combined with central information


Very forward (VF) detectors in hadron colliders, having unique sensitivity to diffractive processes, can be a powerful tool for studying diffractive dissociation by combining them with central detectors. Several Monte Carlo simulation samples in pp-pp collisions at s=13\sqrt s = 13 TeV were analyzed, and different nondiffractive and diffractive contributions were clarified through differential cross sections of forward neutral particles. Diffraction selection criteria in the VF-triggered-event samples were determined by using the central track information. The corresponding selection applicable in real experiments has \approx100% purity and 30%-70% efficiency. Consequently, the central information enables classification of the forward productions into diffraction and nondiffraction categories; in particular, most of the surviving events from the selection belong to low-mass diffraction events at log10(ξx)<5.5\log_{10}(\xi_{x}) < -5.5. Therefore, the combined method can uniquely access the low-mass diffraction regime experimentally.Comment: 10 pages, 16 figures, 1table

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