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${{\mathit \Upsilon}{(11020)}}$ MASS

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M093M

VALUE (MeV) DOCUMENT ID TECN  COMMENT $\bf{ 11000 \pm4}$ OUR AVERAGE $11000.0$ ${}^{+4.0}_{-4.5}$ ${}^{+1.0}_{-1.3}$ 1 MIZUK 2019 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S,2S,3S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $10999.0$ ${}^{+7.3}_{-7.8}$ ${}^{+16.9}_{-1.0}$ 2 MIZUK 2016 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit h}_{{b}}{(1P,2P)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ • • We do not use the following data for averages, fits, limits, etc. • • $11001$ $\pm1$ 3 DONG 2020 A ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit b}}{{\overline{\mathit b}}}$ $11003.0$ $\pm1.1$ ${}^{+0.9}_{-1.0}$ 4, 5 SANTEL 2016 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $10987.5$ ${}^{+6.4}_{-2.5}$ ${}^{+9.1}_{-2.3}$ 6, 7 SANTEL 2016 BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(1S,2S,3S)}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ $10996$ $\pm2$ 8 AUBERT 2009 E BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $11019$ $\pm5$ $\pm7$ BESSON 1985 CLEO ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons $11020$ $\pm30$ LOVELOCK 1985 CUSB ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons 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 ${{\mathit \Upsilon}{(10860)}}$ . 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. 3  From a fit to the dressed cross sections of AUBERT 2009E by BaBar and SANTEL 2016 by Belle above 10.68 GeV with a coherent sum of a continuum amplitude and three Breit-Wigner functions with constant widths. 4  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). 5  Not including uncertain and potentially large systematic errors due to assumed continuum amplitude 1/$\sqrt {s }$ dependence and related interference contributions. 6  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. 7  Superseded by MIZUK 2019 . 8  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:

DONG 2020A CP C44 083001 Hadronic cross section of $e^+e^-$ annihilation at bottomonium energy region MIZUK 2019 JHEP 1910 220 Observation of a new structure near 10.75 GeV in the energy dependence of the e$^{+}$e$^{?}$? ? (nS)?$^{+}$?$^{?}$ (n = 1, 2, 3) cross sections 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