Combined fit to BaBar and Belle data on e+e- to pi+pi- psi(2S)

Abstract

A combined fit is performed to the BaBar and Belle measurements of the e+e- to pi+pi-psi(2S) cross sections for center-of-mass energy between threshold and 5.5 GeV. The resonant parameters of the Y(4360) and Y(4660) are determined. The mass is 4355^{+9}_{-10}\pm 9 MeV/c^2 and the width is 103^{+17}_{-15}\pm 11 MeV/c^2 for the Y(4360), and the mass is 4661^{+9}_{-8}\pm 6 MeV/c^2 and the width is 42^{+17}_{-12}\pm 6 MeV/c^2 for the Y(4660). The production of the Y(4260) in pi+pi-psi(2S) mode is found to be at 2σlevel, and B(Y(4260) to pi+pi-psi(2S))Γ_{e+e-} is found to be less than 4.3 eV/c^2 at the 90% confidence level, or equal to 7.4^{+2.1}_{-1.7} eV/c^2 depending on it interferes with the Y(4360) constructively or destructively. These information will shed light on the understanding of the nature of the Y states observed in initial state radiation processes.

8 pages, 4 figures

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Cited by in corpus (21)

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• Multiquark Resonances
• Hadron Production via e+e- Collisions with Initial State Radiation
• Measurement of the e+e- --> D0D*-pi+ cross section using initial-state radiation
• A mathematical review on the multiple-solution problem
• Measurement of $e^{+}{e}^{-}\to D_s^{(\ast )+}{D}_s^{(\ast )-}$ cross sections near threshold using initial-state radiation
• The $P$-wave $[cs][\bar{c}\bar{s}]$ tetraquark state: Y(4260) or Y(4660)?
• Possible psi(5S), psi(4D), psi(6S) and psi(5D) signals in Lambda(c)-antiLambda(c)
• Meson-meson interactions and Regge propagators
• $P$-wave coupled channel effects in electron-positron annihilation
• Measurements of the branching fractions of ${\eta }_c\to K^{+}{K}^{-}{\pi }^0$, $K_S^0{K}^{\pm }{\pi }^{\mp }$,$2({\pi }^{+}{\pi }^{-}{\pi }^0)$, and $p\bar{p}$
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• Charmonium spectrum with a Dirac potential model in the momentum space
• Multiple solutions in extracting physics information from experimental data
• The process $e^{+}{e}^{-}\to \pi \pi X(3823)$ in the soft pion limit
• The spectrum of charmonium in the Resonance-Spectrum Expansion
• R-Matrix Calculations for Few-Quark Bound States
• Looking for a vector charmonium-like state $Y$ in $e^{+}{e}^{-}\to \bar{D}{D}_1(2420)+c.c.$
• Charmonium[-like] states at Belle and BaBar