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25 April 2024

» arxiv » 1907.9393

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Double Polarization Observables in Pentaquark Photoproduction
JPAC Collaboration ; Daniel Winney ; Cristiano Fanelli ; Alessandro Pilloni ; Astrid N. Hiller Blin ; Cesar Fernandez-Ramirez ; Miguel Albaladejo ; Vincent Mathieu ; Victor I. Mokeev ; Adam P. Szczepaniak ;
Date:	22 Jul 2019
Abstract:	We investigate the properties of the hidden charm pentaquark-like resonances first observed by LHCb in 2015, by measuring the polarization transfer KLL between the incident photon and the outgoing proton in the exclusive photoproduction of J/psi 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 initial state helicity correlation ALL, 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 ALL and KLL in J/psi exclusive photoproduction, in order to determine the pentaquark photocouplings and branching ratios.
Source:	arXiv, 1907.9393
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