Amplitude analysis of $e^+e^- \to \Upsilon(nS) \pi^+\pi^-$ at $\sqrt{s}=10.865$~GeV - INSPIRE

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Amplitude analysis of $e^+e^- \to \Upsilon(nS) \pi^+\pi^-$ at $\sqrt{s}=10.865$ ~GeV

Belle

Collaboration

Mar 4, 2014

16 pages

Published in:

Phys.Rev.D 91 (2015) 7, 072003

Published: Apr 6, 2015

e-Print:

1403.0992 [hep-ex]

DOI:

10.1103/PhysRevD.91.072003

PDG:

{{\mathit T}_{{{b {{\overline{\mathit b}}} 1}}}{(10610)}}

\rightarrow

{{\mathit \Upsilon}{(1S)}}{{\mathit \pi}^{+}}

Report number:

BELLE-PREPRINT-2014-4,
KEK-PREPRINT-2013-63

Experiments:

KEK-BF-BELLE

View in:

reference search105 citations

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Abstract: (APS)

We report results on studies of the e+e− annihilation into three-body ϒ(nS)π+π− (n=1,2,3) final states including measurements of cross sections and the full amplitude analysis. The cross sections measured at s=10.866 GeV and corrected for the initial state radiation are σ(e+e−→ϒ(1S)π+π−)=(2.27±0.12±0.14) pb, σ(e+e−→ϒ(2S)π+π−)=(4.07±0.16±0.45) pb, and σ(e+e−→ϒ(3S)π+π−)=(1.46±0.09±0.16) pb. Amplitude analysis of the three-body ϒ(nS)π+π− final states strongly favors IG(JP)=1+(1+) quantum-number assignments for the two bottomonium-like Zb± states, recently observed in the ϒ(nS)π± and hb(mP)π± (m=1,2) decay channels. The results are obtained with a 121.4 fb−1 data sample collected with the Belle detector at the KEKB asymmetric-energy e+e− collider.

Note:

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

14.40.Pq
12.39.Pn
13.25.Gv
electron positron: annihilation
pi+ pi-: final state
channel cross section: measured
radiation: initial-state interaction
amplitude analysis
hadron spectroscopy
BELLE

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