Abstract
We study the $Y(2175)$ using the method of QCD sum rules. There are two independent $ss\bar s\bar s$ interpolating currents with $J^{PC} = 1^{--}$, and we calculate both their diagonal and off-diagonal correlation functions. We obtain two new currents which do not strongly correlate to each other, so they may couple to two different physical states: one of them couples to the $Y(2175)$, while the other may couple to another state whose mass is about $71 ^{+172}_{-~48}$ MeV larger. Evidences of the latter state can be found in the BaBar, BESII, Belle, and BESIII experiments.
Highlights
We study the Yð2175Þ using the method of quantum chromodynamics (QCD) sum rules
We obtain two new currents that do not strongly correlate to each other, so they may couple to two different physical states: one of them couples to the Yð2175Þ, while the other may couple to another state whose mass is evaluated to be 2.41 Æ 0.25 GeV
In recent years there have been lots of exotic hadrons observed in hadron experiments [1], which cannot be explained in the traditional quark model and are of particular importance to understand the low energy behaviors of quantum chromodynamics (QCD) [2,3,4,5,6,7,8]
Summary
In recent years there have been lots of exotic hadrons observed in hadron experiments [1], which cannot be explained in the traditional quark model and are of particular importance to understand the low energy behaviors of quantum chromodynamics (QCD) [2,3,4,5,6,7,8]. [34] the authors interpreted the Yð2175Þ as a strangeonium hybrid state and used the flux-tube model to study its decay properties. This interpretation is not supported by the nonperturbative lattice QCD calculations [35]. [41] we only calculated the diagonal terms of these two currents, and in this work we shall further calculate their off-diagonal term to study their correlation This can significantly improve our understanding on the relations between interpolating currents and physical states
Sign-in/Register to view highlights & summary 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.
