${{\mathit \phi}{(1020)}}$ WIDTH INSPIRE search

M004W
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 4.249 \pm0.013}$ OUR AVERAGE  Error includes scale factor of 1.1.
$4.234$ $\pm0.22$ $\pm0.12$
DRUZHININ
2025
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$4.245$ $\pm0.013$ 2.3M 1
KOZYREV
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
LEES
2014H
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \gamma}}$
$4.29$ $\pm0.04$ $\pm0.07$ 3
LEES
2013Q
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \gamma}}$
$4.30$ $\pm0.06$ $\pm0.17$ 105k
AKHMETSHIN
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
AKHMETSHIN
2004
CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$4.21$ $\pm0.04$ 1900k 5
ACHASOV
2001E
 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
AKHMETSHIN
1995
CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.5$ $\pm0.7$ 1500
ARENTON
1982
AEMS 11.8 polar. ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}}$
$4.2$ $\pm0.6$ 766 6
IVANOV
1981
OLYA 1$-$1.4 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.3$ $\pm0.6$ 6
CORDIER
1980
DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.36$ $\pm0.29$ 3681 6
BUKIN
1978C
 OLYA ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.4$ $\pm0.6$ 984 6
BESCH
1974
CNTR 2 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.67$ $\pm0.72$ 681 6
BALAKIN
1971
OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.09$ $\pm0.29$
BIZOT
1970
OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
• • • We do not use the following data for averages, fits, limits, etc. • • •
$4.212$ $\pm0.20$ $\pm0.13$ 1.28M 7, 8
ACHASOV
2024
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$4.151$ $\pm0.018$ 9
DUBNICKA
2024
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ , ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$4.681$ $\pm0.277$ 34M 10
IGNATOV
2024
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$4.07$ $\pm0.13$ $\pm0.01$ 11
HOID
2020
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$
$4.23$ $\pm0.04$ $\pm0.02$ 12
HOFERICHTER
2019
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.249$ $\pm0.015$ 1.7M
KOZYREV
2018
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.240$ $\pm0.017$ 610k
KOZYREV
2016
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$
$4.37$ $\pm0.02$
LEES
2013F
 BABR ${{\mathit D}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{+}}$
$4.24$ $\pm0.02$ $\pm0.03$ 542k 13
AKHMETSHIN
2008
CMD2 1.02 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.28$ $\pm0.13$ 12540 14
AUBERT,B
2005J
 BABR ${{\mathit D}^{0}}$ $\rightarrow$ ${{\overline{\mathit K}}^{0}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.45$ $\pm0.06$ 271k
DIJKSTRA
1986
SPEC 100 ${{\mathit \pi}^{-}}{}^{}\mathrm {Be}$
$3.6$ $\pm0.8$ 337 6
COOPER
1978B
 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 14, 6
AKERLOF
1977
SPEC 400 ${{\mathit p}}$ ${}^{}\mathrm {A}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ X
$4.5$ $\pm0.8$ 500 14, 6
AYRES
1974
ASPK 3$-$6 ${{\mathit \pi}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit n}}$, ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}{{\mathit \Lambda}}$ $/{{\mathit \Sigma}^{0}}$
$3.81$ $\pm0.37$
COSME
1974B
 OSPK ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$3.8$ $\pm0.7$ 454 6
BORENSTEIN
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  From a fit of the cross section in the energy region 1.000 $<$ $\sqrt {s }$ $<$ 1.100 GeV using a vector meson dominance model with contribution from ${{\mathit \phi}{(1020)}}$, ${{\mathit \rho}{(770)}}$, ${{\mathit \omega}{(782)}}$ and higher vector resonances.
8  Superseded by DRUZHININ 2025.
9  From the fit to data of CMD3, BABAR and BES3.
10  From a fit of the pion form factor in the energy range 0.32 $<$ $\sqrt {s }$ $<$ 1.2 GeV using the GOUNARIS 1968 parametrization with the complex phase of the ${{\mathit \rho}}−{{\mathit \omega}}$ interference leaving ${{\mathit \rho}{(1450)}}$, ${{\mathit \rho}{(1700)}}$ resonances as free parameters of the fit. Systematic errors not estimated.
11  The values were extracted from a dispersively improved Breit-Wigner parameterization.
12  The values were extracted from a dispersively improved Breit-Wigner parameterization and do not include vacuum polarization.
13  Strongly correlated with AKHMETSHIN 2004.
14  Systematic errors not evaluated.
  References:
DRUZHININ 2025
PPN 56 405 Measurement of ?(1020) Parameters in the ${{e}^{ + }}{{e}^{ - }} \to {{K}_{S}}{{K}_{L}}$ Reaction
ACHASOV 2024
PR D110 072001 Measurement of the $e^+e^-\to K_SK_L$ cross section near the $\phi(1020)$ resonance with the SND detector
DUBNICKA 2024
PR D110 054019 What is the real value of the ratio R=??K+K-/KL0KS0?
IGNATOV 2024
PR D109 112002 Measurement of the $e^+e^-\to\pi^+\pi^-$ cross section from threshold to 1.2 GeV with the CMD-3 detector
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 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
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
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