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http://hdl.handle.net/2445/185490
Title: | Observation of Multiplicity Dependent Prompt χc1 (3872) and ψ (2S) Production in pp Collisions |
Author: | Alfonso Albero, Alejandro Garcia Moreno, P. Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, A. Mauricio, J. Vazquez Gomez, R. Marin Benito, Carla |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | 2021 |
Publisher: | American Physical Society |
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. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.126.092001 |
It is part of: | Physical Review Letters, 2021, vol. 2021, p. 1-20 |
URI: | http://hdl.handle.net/2445/185490 |
Related resource: | https://doi.org/10.1103/PhysRevLett.126.092001 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB)) Articles publicats en revistes (Física Quàntica i Astrofísica) |
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