#### ${{\mathit \phi}{(1020)}}$ WIDTH

VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
 $\bf{ 4.249 \pm0.013}$ OUR AVERAGE  Error includes scale factor of 1.1.
$4.245$ $\pm0.013$ 2.3M 1
 2018
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$4.205$ $\pm0.103$ $\pm0.067$ 28k 2
 2014 H
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \gamma}}$
$4.29$ $\pm0.04$ $\pm0.07$ 3
 2013 Q
BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \gamma}}$
$4.30$ $\pm0.06$ $\pm0.17$ 105k
 2006
CMD2 $0.98 - 1.06$ ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.280$ $\pm0.033$ $\pm0.025$ 272k 4
 2004
CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$4.21$ $\pm0.04$ 1900k 5
 2001 E
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit K}_{{S}}}{{\mathit K}_{{L}}}$ , ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.44$ $\pm0.09$ 55600
 1995
CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.5$ $\pm0.7$ 1500
 1982
AEMS 11.8 polar. ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}}$
$4.2$ $\pm0.6$ 766 6
 1981
OLYA 1$-$1.4 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.3$ $\pm0.6$ 6
 1980
DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.36$ $\pm0.29$ 3681 6
 1978 C
OLYA ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.4$ $\pm0.6$ 984 6
 1974
CNTR 2 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.67$ $\pm0.72$ 681 6
 1971
OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.09$ $\pm0.29$
 1970
OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
• • We do not use the following data for averages, fits, limits, etc. • •
$4.07$ $\pm0.13$ $\pm0.01$ 7
 2020
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$
$4.23$ $\pm0.04$ $\pm0.02$ 8
 2019
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.249$ $\pm0.015$ 1.7M
 2018
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.240$ $\pm0.017$ 610k
 2016
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$4.37$ $\pm0.02$
 2013 F
BABR ${{\mathit D}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$4.24$ $\pm0.02$ $\pm0.03$ 542k 9
 2008
CMD2 1.02 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.28$ $\pm0.13$ 12540 10
 2005 J
BABR ${{\mathit D}^{0}}$ $\rightarrow$ ${{\overline{\mathit K}}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.45$ $\pm0.06$ 271k
 1986
SPEC 100 ${{\mathit \pi}^{-}}{}^{}\mathrm {Be}$
$3.6$ $\pm0.8$ 337 6
 1978 B
HBC 0.7$-$0.8 ${{\overline{\mathit p}}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$4.5$ $\pm0.50$ 1300 10, 6
 1977
SPEC 400 ${{\mathit p}}$ ${}^{}\mathrm {A}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ X
$4.5$ $\pm0.8$ 500 10, 6
 1974
ASPK 3$-$6 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$ , ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \Lambda}}$ $/{{\mathit \Sigma}^{0}}$
$3.81$ $\pm0.37$
 1974 B
OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$3.8$ $\pm0.7$ 454 6
 1972
HBC 2.18 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit n}}$
 1 Average of KOZYREV 2016 and KOZYREV 2018 values taking into account the correlated uncertainties. Supersedes individual KOZYREV 2016 and KOZYREV 2018 results.
 2 Using a vector meson dominance model with contribution from ${{\mathit \phi}{(1020)}}$ and higher mass excitations of ${{\mathit \rho}{(770)}}$ , ${{\mathit \omega}{(782)}}$ , and ${{\mathit \phi}{(1020)}}$ .
 3 Using a phenomenological model based on KUHN 1990 with a sum of Breit-Wigner resonances for ${{\mathit \rho}{(770)}}$ , ${{\mathit \omega}{(782)}}$ , ${{\mathit \phi}{(1020)}}$ and their higher mass excitations.
 4 Update of AKHMETSHIN 1999D
 5 From the combined fit assuming that the total ${{\mathit \phi}{(1020)}}$ production cross section is saturated by those of ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit K}_{{S}}}{{\mathit K}_{{L}}}$ , ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ , and ${{\mathit \eta}}{{\mathit \gamma}}$ decays modes and using ACHASOV 2000B for the ${{\mathit \eta}}{{\mathit \gamma}}$ decay mode.
 6 Width errors enlarged by us to 4${}\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.
 7 The values were extracted from a dispersively improved Breit-Wigner parameterization.
 8 The values were extracted from a dispersively improved Breit-Wigner parameterization and do not include vacuum polarization.
 9 Strongly correlated with AKHMETSHIN 2004 .
 10 Systematic errors not evaluated.
References:
 HOID 2020
EPJ C80 988 Hadronic vacuum polarization and vector-meson resonance parameters from $e^+e^-\rightarrow \pi ^0\gamma$
 HOFERICHTER 2019
JHEP 1908 137 Three-pion contribution to hadronic vacuum polarization
 KOZYREV 2018
PL B779 64 Study of the Process ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ in the Center-of-Mass Energy Range $1010 - 1060$ MeV with the CMD-3 Detector
 KOZYREV 2016
PL B760 314 Study of the Process ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ in the Center-of-Mass Energy Range $1004 - 1060$ MeV with the CMD-3 Detector at the VEPP-2000 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ Collider
 LEES 2014H
PR D89 092002 Cross Sections for the Reactions ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ , ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , and ${{\mathit K}_S^0}$ ${{\mathit K}_S^0}$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ from Events with Initial-State Radiation
 LEES 2013F
PR D87 052010 Search for Direct $\mathit CP$ Violation in Singly Cabibbo-Suppressed ${{\mathit D}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{\pm}}$ Decays
 LEES 2013Q
PR D88 032013 Precision Measurement of the ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$( ${{\mathit \gamma}}$) Cross Section with the Initial-State Radiation Method at BaBar
 AKHMETSHIN 2008
PL B669 217 Measurement of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \phi}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ Cross Section with CMD-2 Detector at VEPP-2M Collider
 AKHMETSHIN 2006
PL B642 203 Study of ${{\mathit \phi}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ with CMD-2 Detector
 AUBERT,B 2005J
PR D72 052008 Dalitz Plot Analysis of ${{\mathit D}^{0}}$ $\rightarrow$ ${{\overline{\mathit K}}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
 AKHMETSHIN 2004
PL B578 285 Reanalysis of Hadronic Cross Section Measurements at CMD-2
 ACHASOV 2001E
PR D63 072002 Measurements of the Parameters of the ${{\mathit \phi}{(1020)}}$ Resonance through Studies of the Processes ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ , and ${{\mathit \pi}^{+}}$ ${{\mathit \pi}^{-}}$ ${{\mathit \pi}^{0}}$
 AKHMETSHIN 1995
PL B364 199 Measurement of ${{\mathit \phi}}$ -Meson Parameters with CMD-2 Detector at VEPP-2M Collider
 DIJKSTRA 1986
ZPHY C31 375 High Statistics Inclusive ${{\mathit \phi}}$ Meson Production at SPS Energy
 ARENTON 1982
PR D25 2241 ${{\mathit \phi}}$ Meson Production in the Reaction ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit p}}$ at 11.75 ${\mathrm {GeV/}}\mathit c$
 IVANOV 1981
PL 107B 297 Measurement of the Charged Kaon Formfactor in the Energy Range 1.0 to 1.4 GeV
 Also
Private Comm. Private Communication
 CORDIER 1980
NP B172 13 Cross Section of the Reaction ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$ for Center-of-Mass Energies from 750 to 1100 MeV
 BUKIN 1978C
SJNP 27 516 The ${{\mathit \phi}}$ Meson: Precision Measurement of its Mass, Observation of the ${{\mathit \omega}}$ ${{\mathit \phi}}$ Interference
 COOPER 1978B
NP B146 1 ${{\mathit \phi}}$ and ${{\mathit \omega}}$ Meson Production in ${{\overline{\mathit p}}}$ ${{\mathit p}}$ Annihilations at $0.70 - 0.76$ ${\mathrm {GeV/}}\mathit c$ and the OZI Rule
 AKERLOF 1977
PRL 39 861 Measurement of ${{\mathit \phi}}$ Production in Proton Nucleus Collisions at 400 ${\mathrm {GeV/}}\mathit c$
 AYRES 1974
PRL 32 1463 ${{\mathit \phi}}$ Meson Production in ${{\mathit \pi}^{-}}{{\mathit p}}$ and ${{\mathit K}^{-}}{{\mathit p}}$ Interactions from 3 to 6 ${\mathrm {GeV/}}\mathit c$
 BESCH 1974
NP B70 257 Photoproduction of ${{\mathit \phi}}$ Mesons on Protons at 2.0 GeV
 COSME 1974B
PL 48B 159 ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ Production by ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ Annihilation at ${{\mathit \phi}}$ Energy
 BORENSTEIN 1972
PR D5 1559 Reaction ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit \Xi}^{-}}{{\mathit K}^{0}}{{\mathit \pi}^{+}}$ at 2.18 ${\mathrm {GeV/}}\mathit c$
 BALAKIN 1971
PL 34B 328 Investigation of the ${{\mathit \phi}}$ Meson Resonance by Electron Positron Colliding Beams
 BIZOT 1970
PL 32B 416 Study of the ${{\mathit \phi}}$ Meson by ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ Annihilation into Charged ${{\mathit K}}$ Mesons and Tests of Vector Dominance Models
 Also
Liverpool Sym. 69 Experiments with the Orsay Storage Ring ACO