Hidden-Heavy Pentaquarks and Where to Find Them
Fareed Alasiri, Eric Braaten, Roberto Bruschini

TL;DR
This paper explains the structure of observed hidden-charm pentaquarks using Born-Oppenheimer potentials, predicts new states, and clarifies their narrow decay widths, advancing understanding of exotic hadrons.
Contribution
It introduces a simple model for hidden-charm pentaquarks as bound states in Born-Oppenheimer potentials, predicting new states and clarifying quantum numbers and decay widths.
Findings
Identifies observed pentaquarks as heavy-quark spin states.
Predicts a new $c\bar{c}$ pentaquark near the $\Sigma_c^*\bar{D}$ threshold.
Explains narrow widths of hidden-charm pentaquarks.
Abstract
We provide a simple explanation for the observed hidden-charm pentaquarks as bound states in Born-Oppenheimer potentials. We identify , , and as heavy-quark spin states in a quartet of pentaquarks with quantum numbers , , and . The quantum numbers of differ from most previous predictions. We also predict a fourth pentaquark with quantum numbers near the threshold. We identify and as heavy-quark spin states in a triplet of pentaquarks with quantum numbers and either or . We also predict a third pentaquark with quantum numbers either or …
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Cold Atom Physics and Bose-Einstein Condensates · Spectral Theory in Mathematical Physics
