# ${{\boldsymbol \Upsilon}{(11020)}}$ MASS INSPIRE search

VALUE (MeV) DOCUMENT ID TECN  COMMENT
$\bf{ 10992.9 {}^{+10.0}_{-3.1}}$ OUR AVERAGE
$10999.0$ ${}^{+7.3}_{-7.8}$ ${}^{+16.9}_{-1.0}$ 1
 2016
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit h}_{{b}}{(1P,2P)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$10987.5$ ${}^{+6.4}_{-2.5}$ ${}^{+9.1}_{-2.3}$ 2
 2016
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S,2S,3S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
• • • We do not use the following data for averages, fits, limits, etc. • • •
$11003.0$ $\pm1.1$ ${}^{+0.9}_{-1.0}$ 3, 4
 2016
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$10996$ $\pm2$ 5
 2009 E
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$11019$ $\pm5$ $\pm7$
 1985
CLEO ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$11020$ $\pm30$
 1985
CUSB ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
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.
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).
4  Not including uncertain and potentially large systematic errors due to assumed continuum amplitude 1/$\sqrt {s }$ dependence and related interference contributions.
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.
References:
 MIZUK 2016
PRL 117 142001 Energy Scan of the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit h}_{{b}}}$( ${{\mathit n}}{{\mathit P}}$) ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ (n=1,2) Cross Sections and Evidence for ${{\mathit \Upsilon}{(11020)}}$ Decays into Charged Bottomonium-like States
 SANTEL 2016
PR D93 011101 Measurements of the ${{\mathit \Upsilon}{(10860)}}$ and ${{\mathit \Upsilon}{(11020)}}$ Resonances via $\sigma\mathrm {( {{\mathit e}^{+}} {{\mathit e}^{-}} \rightarrow {{\mathit \Upsilon}{(nS)}} {{\mathit \pi}^{+}} {{\mathit \pi}^{-}} )}$
 AUBERT 2009E
PRL 102 012001 Measurement of the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ Cross Section between $\sqrt {s }$ = 10.54 and 11.20 GeV
 BESSON 1985
PRL 54 381 Observation of New Structure in the ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Cross Section above the ${{\mathit \Upsilon}{(4S)}}$
 LOVELOCK 1985
PRL 54 377 Masses, Widths and Leptonic Widths of the Higher ${{\mathit \Upsilon}}$ Resonances