Abstract
The instanton effects on the charmonium spectrum is discussed in the framework of nonrelativistic potential model. The results from constituent quark model without inclusion of instanton effects is compared with the results for `the potential from constituent quark model + the contribution from the instanton liquid model'. We consider two models with the corresponding instanton potentials and discuss their relevance to explanations of the origin phenomenological parameters used in the nonrelativistic potential models. We also present the universal instanton potential in the parametrized form which can be useful in practical calculations.
Highlights
The physics of charmonia has entered a new era, since the finding of the first narrow exotic charmonium was reported by the Belle Collaboration [1]
We do not intend to carry out any fine-tuning to the experimental data but we concentrate on nonperturbative physics as to how the instanton-induced potentials have an effect on the charmonium spectrum
The results showed that the instantoninduced potentials improved the mass spectrum with the original values of the average size of the instanton and the average interdistance between instantons
Summary
The physics of charmonia has entered a new era, since the finding of the first narrow exotic charmonium was reported by the Belle Collaboration [1]. Many narrow exotic charmonium states have been consecutively observed [2,3,4,5,6,7,8,9,10,11,12,13] and were coined collectively the XYZ mesons (see recent reviews [14,15]). These new exotic charmonium states have drawn considerable attention Note that the static Coulomb-like potential was scrutinized already
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
