Study of and evidence for decaying into
We study the reaction $$e^+e^– → π^+π^–π^0η_c$$ for the first time using data samples collected with the BESIII detector at center-of-mass energies $$\sqrt{s}$$ = 4.226 , 4.258, 4.358, 4.416, and 4.600 GeV. Evidence of this process is found and the Born cross section $$σ^B (e^+e^– → π^+π^–π^0η_c$$), excluding $$e^+e^– → ωη_c$$ and $$ηη_c$$, is measured to be ($$46^{+12}_{–11} ± 10$$) pb at $$\sqrt{s}$$ = 4.226 GeV. Evidence for the decay $$Z_c(3900)^± → ρ^±η_c$$ is reported at $$\sqrt{s}$$ = 4.226 GeV with a significance of 3.9σ, including systematic uncertainties, and the Born cross section times branching fraction $$σ^B(e^+e^– → π^∓Z_c(3900)^±) × \mathcal{B}(Z_c(3900)^± → ρ^±η_c)$$ is measured to be (48 ± 11 ± 11) pb, which indicates that $$e^+e^– → π^∓Z_c( 3900)^± → π^∓ρ^±η_c$$ dominates the $$e^+e^– → π^+π^–π^0η_c$$ process. The $$Z_c(3900)^± → ρ^±η_c$$ signal is not significant at the other center-of-mass energies and the corresponding upper limits are determined. In addition, no significant signal is observed in a search for $$Z_c(4020)^± → ρ^±η_c$$ with the same data samples. The ratios $$R_{Z_c(3900)} = \mathcal{B}(Z_c(3900)^± → ρ^±η_c)/ \mathcal{B}(Z_c(3900)^± → π^± J / ψ)$$ and $$R_{Z_{c(4020)}} = \mathcal{B}(Z_c(4020)^± → ρ^±η_c)/\mathcal{B}(Z_c(4020)^± → π^±h_c)$$ are obtained and compared with different theoretical interpretations of the $$Z_c(3900)^±$$ and $$Z_c(4020)^±$$.
- Research Organization:
- Indiana Univ., Bloomington, IN (United States); Carnegie Mellon Univ., Pittsburgh, PA (United States); Univ. of Minnesota, Minneapolis, MN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- Contributing Organization:
- BESIII Collaboration
- Grant/Contract Number:
- FG02-05ER41374; SC-0010118; SC-0012069; SC0010118; SC0012069
- OSTI ID:
- 1580303
- Alternate ID(s):
- OSTI ID: 1800284
- Journal Information:
- Physical Review D, Journal Name: Physical Review D Vol. 100 Journal Issue: 11; ISSN 2470-0010
- Publisher:
- American Physical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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