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${{\mathit \Upsilon}{(1S)}}$ MASS

INSPIRE JSON (beta) PDGID:

VALUE (MeV)

EVTS

DOCUMENT ID

TECN

COMMENT

$\bf{ 9460.40 \pm0.10}$

OUR AVERAGE

$9460.37$ $\pm0.01$ $\pm2.85$

15M

LHCB

${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

$9460.40$ $\pm0.09$ $\pm0.04$

RVUE

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

• • We do not use the following data for averages, fits, limits, etc. • •

$9460.11$ $\pm0.11$ $\pm0.07$

RVUE

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

$9460.51$ $\pm0.09$ $\pm0.05$

MD1

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

$9460.60$ $\pm0.09$ $\pm0.05$

MD1

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

$9460.59$ $\pm0.12$

MD1

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

$9460.6$ $\pm0.4$

MD1

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

$9459.97$ $\pm0.11$ $\pm0.07$

CUSB

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons

¹	Observed in prompt ${{\mathit p}}{{\mathit p}}$ production.

²	Reanalysis of MD1 data using the electron mass from COHEN 1987, the radiative corrections from KURAEV 1985 and interference effects.

³	Obtained by reanalysing CUSB data (MACKAY 1984), but not authored by the CUSB collaboration.

⁴	Reanalysis of BARU 1992B and ARTAMONOV 1984 using new electron mass (COHEN 1987).

⁵	Superseded by SHAMOV 2023.

⁶	Supersedes BARU 1986.

⁷	Superseded by ARTAMONOV 2000.

⁸	Value includes data of ARTAMONOV 1982.

⁹	Reanalysed by SHAMOV 2023.

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