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

Author:
Zhang, Jielei  Yuan, Limin  Wang, Rumin  


Journal:
ADVANCES IN HIGH ENERGY PHYSICS


Issue Date:
2018


Abstract(summary):

Many vector charmonium-like states have been reported recently in the cross sections of e(+) e(-) -> omega chi(c0), pi(+)pi(-)h(c), pi(+)pi(-) integral/psi, pi(+)pi(-) (3686), and pi(+DD*-)-D-0 + 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.


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