Double Polarization Observables in Pentaquark Photoproduction

Autor:	JPAC Collaboration, Winney, Daniel, Fanelli, Cristiano, Pilloni, Alessandro, Blin, Astrid N. Hiller, Fernandez-Ramirez, Cesar, Albaladejo, Miguel, Mathieu, Vincent, Mokeev, Victor I., Szczepaniak, Adam P.
Rok vydání:	2019
Předmět:	High Energy Physics - Phenomenology High Energy Physics - Experiment Nuclear Experiment
Zdroj:	Phys. Rev. D 100, 034019 (2019)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevD.100.034019
Popis:	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. Comment: 9 pages, 7 figures, 2 tables, Version published in PRD
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1907.09393 Zobrazit plný text záznamu View this record from Arxiv