AUTHOR=Ferretti J. , Santopinto E. 

TITLE=Quark Structure of the X (4500), X (4700) and χc(4P,5P) States

JOURNAL=Frontiers in Physics

VOLUME=Volume 9 - 2021

YEAR=2021

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2021.642028

DOI=10.3389/fphy.2021.642028

ISSN=2296-424X

ABSTRACT=We study some of the main properties (masses and open-flavor strong decay widths) of 4P and 5P
charmonia. While there are two candidates for the χ c0(4P; 5P) states, the X(4500) and X(4700),
the properties of the other members of the χ c(4P; 5P) multiplets are still completely unknown.
With this in mind, we start to explore the charmonium interpretation for these mesons. Our second
goal is to investigate if the apparent mismatch between the Quark Model (QM) predictions for
 χ c 0(4P; 5P) states and the properties of the X(4500) and X(4700) mesons can be overcome by
introducing threshold corrections in the QM formalism. According to our coupled-channel model
results for the threshold mass shifts, the χ c0(5P)  ->X(4700) assignment is unacceptable, while the χ c0(4P)  as  X(4500) or X(4700) assignments cannot be completely ruled out.