Double polarization observables in pentaquark photoproduction



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Winney, D. and Fanelli, C. and Pilloni, A. and Blin, A. N. Hiller and Fernández Ramírez, C. and Albaladejo, M. and Mathieu, V. and Mokeev, V. I. and Szczepaniak, A. P. (2019) Double polarization observables in pentaquark photoproduction. Physical Review D, 100 (3). ISSN 2470-0010

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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.

Item Type:Article
Subjects:Sciences > Physics > Physics-Mathematical models
ID Code:74440
Deposited On:22 Sep 2022 13:22
Last Modified:23 Sep 2022 07:31

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