2026-06-27T12:30:21Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/128762024-09-04T18:17:18Zcom_20.500.14352_14col_20.500.14352_15

Double polarization observables in pentaquark photoproduction Winney, D. Fanelli, C. Pilloni, A. Fernández Ramírez, César Blin, A. N. Hiller Albaladejo, M. Mathieu, Vincent Mokeev, V. I. Szczepaniak, A. P. We investigate the properties of the hidden-charm pentaquark-like resonances first observed by the LHCb Collaboration in 2015, by measuring the polarization transfer K L L between the incident photon and the outgoing proton in the exclusive photoproduction of J / ψ near threshold. We present a first estimate of the sensitivity of this observable to the pentaquark photocouplings and hadronic branching ratios, and extend our predictions to the case of the initial-state helicity correlation A L L , using a polarized target. These results serve as a benchmark for the SBS experiment at Jefferson Lab, which proposes to measure for the first time the helicity correlations A L L and K L L in J / ψ exclusive photoproduction, in order to determine the pentaquark photocouplings and branching ratios. 2023-06-17T12:44:30Z 2023-06-17T12:44:30Z 2023-06-17T12:44:30Z 2019-08-20 journal article https://hdl.handle.net/20.500.14352/12876 2470-0010 10.1103/PhysRevD.100.034019 eng DE-AC05-06OR23177, No. DE-FG02- 87ER40365, and No. DE-FG02-94ER40818 IA101819 251817 and No. A1-S21389 204404729—SFB 1044, no. 39083149 https://creativecommons.org/licenses/by/3.0/es/ open access Atribución 3.0 España APS Physics