Abstract

The BESIII experiment have collected about 9 [Formula: see text] luminosity data samples above 3.8 GeV. Recent result on the XYZ states, which are also called exotic states, from BESIII experiment is presented in this talk, including the measurement of resonance parameters of vector [Formula: see text] states, the establishment of two isospin triplets of [Formula: see text] states, and the determination of spin-parity of [Formula: see text].

Highlights

  • The potential model works well in describing the heavy quarkonia states, especially for the charmonia states below the open-charm threshold

  • An abundance of states have been discovered above the open charm threshold, which take advantage of the large statistics from B factory and BESIII experiment

  • All of these states are called exotic states. Those states are mostly found in reconstructing the ccfinal states, so they are called as charmonium-like states or XY Z states

Read more

Summary

Introduction

The potential model works well in describing the heavy quarkonia states, especially for the charmonia states below the open-charm threshold. A fit to the cross section from the charged mode indicates that there might be two structure contributions. The mass and width of the first resonance are measured to be (4209.5 ± 7.4 ± 1.4) MeV/c2 and (80.1 ± 24.6 ± 2.9) MeV, and those of the second resonance are (4383.8±4.2±0.8) MeV/c2 and (84.2±12.5±2.1) MeV. The evidence of the first resonance is reported for the first time and the measurement of the second resonance are consistent with Belle and BABAR results, but with much improved precision.

Results
Conclusion

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 call

Disclaimer: 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.