2026-04-17T05:18:47Zhttps://recercat.cat/oai/requestoai:recercat.cat:2445/1854902025-12-05T16:47:56Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917
RECERCAT
author
Alfonso Albero, Alejandro
author
García Moreno, Paula
author
Garrido Beltrán, Lluís
author
Gironella Gironell, P.
author
Gomez Fernandez, S.
author
Graugés Pous, Eugeni
author
Lobo Salvia, A.
author
Mauricio, J.
author
Vazquez Gomez, R.
author
Marin Benito, Carla
2022-05-10T15:24:04Z2022-05-10T15:24:04Z20212022-05-10T15:24:04Z
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.
(c) American Physical Society, 2021 info:eu-repo/semantics/openAccess
Hadrons
Gran Col·lisionador d'Hadrons
Física de partícules
Experiments
Hadrons
Large Hadron Collider (France and Switzerland)
Particle physics
Experiments
Observation of Multiplicity Dependent Prompt χc1 (3872) and ψ (2S) Production in pp Collisions
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion