| $\bf{
24 {}^{+8}_{-6}}$
|
OUR AVERAGE
|
| $23.8$ ${}^{+8.0}_{-6.8}$ ${}^{+0.7}_{-1.8}$ |
1 |
|
BELL |
| $27$ ${}^{+27}_{-11}$ ${}^{+5}_{-12}$ |
2 |
|
BELL |
| • • • We do not use the following data for averages, fits, limits, etc. • • • |
| $39.3$ ${}^{+1.7}_{-1.6}$ ${}^{+1.3}_{-2.4}$ |
3, 4 |
|
BELL |
| $61$ ${}^{+9}_{-19}$ ${}^{+2}_{-20}$ |
5, 6 |
|
BELL |
| $37$ $\pm3$ |
7 |
|
BABR |
| $61$ $\pm13$ $\pm22$ |
|
|
CLEO |
| $90$ $\pm20$ |
|
|
CUSB |
|
1
From a simultaneous fit to the ${{\mathit \Upsilon}{(nS)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , $\mathit n$ = 1, 2, 3, cross sections at 28 energy points within $\sqrt {s }$ = $10.6 - 11.05$ GeV, including the initial-state radiation at ${{\mathit \Upsilon}{(10860)}}$ .
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2
From a simultaneous fit to the ${{\mathit h}_{{b}}{(nP)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , $\mathit n$ = 1, 2 cross sections at 22 energy points within $\sqrt {s }$ = $10.77 - 11.02$ GeV to a pair of interfering Breit-Wigner amplitudes modified by phase space factors, with eight resonance parameters (a mass and width for each of ${{\mathit \Upsilon}{(10860)}}$ and ${{\mathit \Upsilon}{(11020)}}$, a single relative phase, a single relative amplitude, and two overall normalization factors, one for each $\mathit n$). The systematic error estimate is dominated by possible interference with a small nonresonant continuum amplitude.
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3
From a fit to the total hadronic cross sections measured at 60 energy points within $\sqrt {s }$ = $10.82 - 11.05$ GeV to a pair of interfering Breit-Wigner amplitudes and two floating continuum amplitudes with 1/$\sqrt {s }$ dependence, one coherent with the resonances and one incoherent, with six resonance parameters (a mass, width, and an amplitude for each of ${{\mathit \Upsilon}{(10860)}}$ and ${{\mathit \Upsilon}{(11020)}}$, one relative phase, and one decoherence coefficient).
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4
Not including uncertain and potentially large systematic errors due to assumed continuum amplitude 1/$\sqrt {s }$ dependence and related interference contributions.
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5
From a simultaneous fit to the ${{\mathit \Upsilon}{(nS)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , $\mathit n$=1, 2, 3, cross sections at 25energy points within $\sqrt {s }$ = $10.6 - 11.05$ GeV to a pair of interfering Breit-Wigner amplitudesmodified by phase space factors, with fourteen resonance parameters (a mass, width, and threeamplitudes for each of ${{\mathit \Upsilon}{(10860)}}$ and ${{\mathit \Upsilon}{(11020)}}$, a single universal relativephase, and three decoherence coefficients, one for each $\mathit n$). Continuum contributions weremeasured (and therefore fixed) to be zero.
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6
Superseded by MIZUK 2019 .
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7
In a model where a flat non-resonant ${{\mathit b}}{{\overline{\mathit b}}}$ -continuum is incoherently added to a second flat component interfering with two Breit-Wigner resonances. Systematic uncertainties not estimated.
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