Study on the Resonant Parameters of Y (4220) and Y (4390)

Zhang, Jielei  (College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China) ; Yuan, Limin (College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China) ; Wang, Rumin (College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China)

18 November 2018

Abstract: Many vector charmonium-like states have been reported recently in the cross sections of e+e-ωχc0 , π+π-hc , π+π-J/ψ , π+π-ψ(3686) , and π+D0D-+c.c. To better understand the nature of these states, a combined fit is performed to these cross sections by using three resonances Y(4220) , Y(4390) , and Y(4660) . The resonant parameters for the three resonances are obtained. We emphasize that two resonances Y(4220) and Y(4390) are sufficient to explain these cross sections below 4.6 GeV. The lower limits of Y(4220) and Y(4390) ’s leptonic decay widths are also determined to be (36.4±2.0±4.2) and (123.8±6.5±9.0) eV.


Published in: Advances in High Energy Physics 2018 (2018) 5428734
Published by: Hindawi
DOI: 10.1155/2018/5428734
arXiv: 1805.03565
License: CC-BY-3.0



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