| $\bf{
10889.9 {}^{+3.2}_{-2.6}}$
|
OUR AVERAGE
|
| $10884.7$ ${}^{+3.6}_{-3.4}$ ${}^{+8.9}_{-1.0}$ |
1 |
|
BELL |
| $10891.1$ $\pm3.2$ ${}^{+1.2}_{-2.0}$ |
2 |
|
BELL |
| • • • We do not use the following data for averages, fits, limits, etc. • • • |
| $10881.8$ ${}^{+1.0}_{-1.1}$ $\pm1.2$ |
3, 4 |
|
BELL |
| $10879$ $\pm3$ |
5, 6 |
|
BELL |
| $10888.4$ ${}^{+2.7}_{-2.6}$ $\pm1.2$ |
7 |
|
BELL |
| $10876$ $\pm2$ |
5 |
|
BABR |
| $10869$ $\pm2$ |
8 |
|
BABR |
| $10868$ $\pm6$ $\pm5$ |
9 |
|
CLEO |
| $10845$ $\pm20$ |
10 |
|
CUSB |
|
1
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.
|
|
2
From a simultaneous fit to the ${{\mathit \Upsilon}{(nS)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , $\mathit n$ = 1, 2, 3 cross sections at 25 energy points within $\sqrt {s }$ = $10.6 - 11.05$ GeV to a pair of interfering Breit-Wigner amplitudes modified by phase space factors, with fourteen resonance parameters (a mass, width, and three amplitudes for each of ${{\mathit \Upsilon}{(10860)}}$ and ${{\mathit \Upsilon}{(11020)}}$, a single universal relative phase, and three decoherence coefficients, one for each $\mathit n$). Continuum contributions were measured (and therefore fixed) to be zero.
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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
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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6
The parameters of the ${{\mathit \Upsilon}{(11020)}}$ are fixed to those in AUBERT 2009E.
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7
In a model where a flat nonresonant ${{\mathit \Upsilon}{(1S,2S,3S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ continuum interferes with a single Breit-Wigner resonance.
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8
In a model where a non-resonant ${{\mathit b}}{{\overline{\mathit b}}}$ -continuum represented by a threshold function at $\sqrt {s }=2{\mathit m}_{{{\mathit B}}}$ is incoherently added to a flat component interfering with two Breit-Wigner resonances. Not independent of other AUBERT 2009E results. Systematic uncertainties not estimated.
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9
Assuming four Gaussians with radiative tails and a single step in $\mathit R$.
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|
10
In a coupled-channel model with three resonances and a smooth step in $\mathit R$.
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