Amplitude analysis of e+e- => Y(nS)pi+pi- at sqrt(s)=10.865 GeV

Abstract

We report results on studies of the e+e- annihilation into three-body Y(nS)pi+pi- (n=1,2,3) final states including measurements of cross sections and the full amplitude analysis. The cross sections measured at sqrt(s)=10.865 GeV and corrected for the initial state radiation are sigma(e+e-=>Y(1S)pi+pi-)=(2.27+-0.12+-0.14) pb, sigma(e+e-=>Y(2S)pi+pi-)=(4.07+-0.16+-0.45) pb, and sigma(e+e-=>Y(3S)pi+pi-)=(1.46+-0.09+-0.16) pb. Amplitude analysis of the three-body Y(nS)pi+pi- final states strongly favors I^G(J^P)=1^+(1^+) quantum-number assignments for the two bottomonium-like Zb+- states, recently observed in the Y(nS)pi+- and hb(mP)pi+- (m=1,2) decay channels. The results are obtained with a $121.4 1/fb data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider.

arXiv comment15 pages, 6 tables, 9 figures. To be submitted to Phys. Rev. D

References in corpus (18)

• Observation of two charged bottomonium-like resonances in Y(5S) decays
• Charmonium
• Quest for precision in hadronic cross sections at low energy: Monte Carlo tools vs. experimental data
• Heavy quark spin structure in Z_b resonances
• Born-Oppenheimer Approximation for the XYZ Mesons
• Observation of anomalous Upsilon(1S)pi+pi- and Upsilon(2S)pi+pi- production near the Upsilon(5S) resonance
• Spectroscopy at B-factories Using Hard Photon Emission
• Dalitz analysis of the three-body charmless decays B+=>K+Pi+Pi- and B+=>K+K+K-
• First observation of the P-wave spin-singlet bottomonium states h_b(1P) and h_b(2P)
• Evidence for Large Direct CP Violation in B+-=>rho(770)0K+- from Analysis of the Three-Body Charmless B+-=>K+-pi+-pi-+ Decay
• Tetraquark Interpretation of the Charged Bottomonium-like states Z_b^+-(10610) and Z_b^+-(10650) and Implications
• $Z_b(10610)$ and $Z_b(10650)$ structures produced by the initial single pion emission in the ${\rm Y}(5S)$ decays
• Hadron interaction with heavy quarkonia
• First Observation of the Zb0(10610) in a Dalitz Analysis of Y(5S) -> Y(nS) pi0 pi0
• Exotic mesons with hidden bottom near thresholds
• How good are your fits? Unbinned multivariate goodness-of-fit tests in high energy physics
• Precise measurement of the branching fractions for Bs->Ds(*)+ Ds(*)- and first measurement of the Ds*+ Ds*- polarization using e+e- collisions
• Two-pion transitions in quarkonium revisited

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