Document type
ArticleVersion
Published versionPublication date
All rights reserved
Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/185490
Observation of Multiplicity Dependent Prompt χc1 (3872) and ψ (2S) Production in pp Collisions
Journal Title
Director/Tutor
Journal ISSN
Volume Title
Related resource
Abstract
The production of χc1(3872) and ψ(2S) hadrons is studied as a function of charged particle multiplicity in pp collisions at a center-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 2 fb−1 . For both states, the fraction that is produced promptly at the collision vertex is found to decrease as charged particle multiplicity increases. The ratio of χc1(3872) to ψ(2S) cross-sections for promptly produced particles is also found to decrease with multiplicity, while no significant dependence on multiplicity is observed for the equivalent ratio of particles produced away from the collision vertex in b-hadron decays. This behavior is consistent with a calculation that models the χc1(3872) structure as a compact tetraquark. Implications for the binding energy of the χc1(3872) state are discussed.
Subject (English)
Citation
Citation
ALFONSO ALBERO, Alejandro, et al. Observation of Multiplicity Dependent Prompt χc1 (3872) and ψ (2S) Production in pp Collisions. Physical Review Letters. 2021. Vol. 2021, num. 1-20. ISSN 0031-9007. [consulted: 14 of June of 2026]. Available at: https://hdl.handle.net/2445/185490