Hidden charm pentaquarks: mass spectrum, magnetic moments, and photocouplings
Emmanuel Ortiz-Pacheco, Roelof Bijker, C\'esar Fern\'andez-Ram\'irez
TL;DR
This paper extends the quark model to four flavors to classify and predict hidden charm pentaquarks, calculating their properties and comparing results with lattice QCD, aiding experimental searches.
Contribution
It introduces a four-flavor quark model for pentaquarks, predicts their spectrum and properties, and aligns with recent lattice QCD findings.
Findings
Good agreement with lattice QCD for charm baryons
Predicted magnetic moments and photocouplings of hidden charm pentaquarks
Extended quark model successfully classifies pentaquark states
Abstract
We develop an extension of the usual three flavor quark model to four flavors (u, d, s and c), and discuss the classification of pentaquark states with hidden charm. We fit our model to the known baryon spectrum and we predict the double and triple charm baryons, finding good agreement with the most recent lattice QCD calculations. We compute the the ground state of hidden charm pentaquarks and their associated magnetic moments and electromagnetic couplings, of interest to pentaquark photoproduction experiments.
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