Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at √s= 13 TeV

Belyaev, A.V.; Boos, E.; Dubinin, M.; Dudko, L.; Gribushin, A.; Khein, L.; Klyukhin, V.; Kodolova, O.; Lukina, O.; Obraztsov, S.; Petrushanko, S.V.; Savrin, V.; Snigirev, A.; CMS, C.

Авторы: Belyaev A.V., Boos E., Dubinin M., Dudko L., Gribushin A., Khein L., Klyukhin V., Kodolova O., Lukina O., Obraztsov S., Petrushanko S.V., Savrin V., Snigirev A., CMS Collaboration
Журнал: Physical Review D
Том: 109
Год издания: 2024
Издательство: American Physical Society
Местоположение издательства: United States
Первая страница: 112013
DOI: 10.1103/PhysRevD.109.112013
Аннотация: The central exclusive production of charged-hadron pairs in pp collisions at a center-of-mass energy of 13 TeV is examined, based on data collected in a special high-β run of the LHC. The nonresonant continuum processes are studied with the invariant mass of the centrally produced two-pion system in the resonance-free region, m_π+π− < 0.7 or m_π+π− > 1.8 GeV. Differential cross sections as functions of the azimuthal angle between the surviving protons, squared exchanged four-momenta, and m_π+π− are measured in a wide region of scattered proton transverse momenta, between 0.2 and 0.8 GeV, and for pion rapidities |y| < 2. A rich structure of interactions related to double-pomeron exchange is observed. A parabolic minimum in the distribution of the two-proton azimuthal angle is observed for the first time. It can be interpreted as an effect of additional pomeron exchanges between the protons from the interference between the bare and the rescattered amplitudes. After model tuning, various physical quantities are determined that are related to the pomeron cross section, proton-pomeron and meson-pomeron form factors, pomeron trajectory and intercept, and coefficients of diffractive eigenstates of the proton.
Добавил в систему: Клюхин Вячеслав Иванович

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Nonresonant central exclusive production of charged-hadron pairs in proton-proton collisions at √s= 13 TeVстатья Исследовательская статья

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