6533b7d4fe1ef96bd12632f7
RESEARCH PRODUCT
Double Polarization Observables in Pentaquark Photoproduction
A. PilloniD. WinneyVincent MathieuVictor MokeevAdam P. SzczepaniakAdam P. SzczepaniakMiguel AlbaladejoCésar Fernández-ramírezC. FanelliC. FanelliA. N. Hiller Blinsubject
Particle physicsFísica-Modelos matemáticosPhotonHadronpentaquarksFOS: Physical sciences01 natural sciencesexotic hadronsHigh Energy Physics - ExperimentPolarized targetHigh Energy Physics - Experiment (hep-ex)High Energy Physics - Phenomenology (hep-ph)0103 physical sciencesPhoton polarizationNuclear Experiment (nucl-ex)010306 general physicsNuclear ExperimentNuclear ExperimentPhysicsexotic hadrons; pentaquarks; hadron spectroscopy010308 nuclear & particles physicshadron spectroscopyObservablePolarization (waves)HelicityPentaquarkHigh Energy Physics - PhenomenologyHigh Energy Physics::Experimentdescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-08-20 |