This title appears in the Scientific Report : 2014 

Probing the nature of Y(4260) in the isospin violating process Y(4260)→J/ψηπ0
Wu, Xiao-Gang (Corresponding Author)
Hanhart, Christoph / Wang, Qian / Zhao, Qiang
Theorie der starken Wechselwirkung; IKP-3
Theorie der Starken Wechselwirkung; IAS-4
Physical Review D Physical review / D, 89 89 (2014 2014) 5 5, S. 054038 054038
[S.l.] Soc. 2014
Journal Article
Hadron Structure and Dynamics (HSD)
Please use the identifier: in citations.
Please use the identifier: in citations.
The isospin violation process Y(4260)→J/ψηπ0 is studied assuming that Y(4260) is a D1D¯+c.c. hadronic molecule. In association with the production of the Zc(3900), which is treated as a DD¯∗+c.c. hadronic molecule, this process can help us distinguish their molecular natures from other scenarios, since the incomplete cancellation between the charged and neutral--meson loops, which are prominent in the molecular picture only, produces a peak in the e+e−→Y(4260)→J/ψηπ0 cross section at the D1D¯+c.c. threshold and a very prominent peak in the J/ψη invariant mass spectrum in between the DD¯∗+c.c. thresholds; the latter being much narrower than the corresponding one in the isospin conserving channel, i.e. J/ψπ+π−. The partial width of Y(4260)→J/ψηπ0 is about 4×10−4 of that of Y(4260)→J/ψπ+π−. The cross section of e+e−→Y(4260)→J/ψηπ0 at the D1D¯+c.c. threshold is about 0.05 pb which is much larger than that produced by the nearby resonances. These features are the direct consequences of the assumed nature of these two states which might be accessible at the high-statistics experiments such as BESIII and LHCb.