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

INSPIRE   JSON  (beta) PDGID:
M004W
VALUE (MeV) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 4.249 \pm0.013}$ OUR AVERAGE  Error includes scale factor of 1.1.
$4.212$ $\pm0.20$ $\pm0.13$ 1.28M 1
ACHASOV
2024
SND ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$4.245$ $\pm0.013$ 2.3M 2
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 3
LEES
2014H
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_S^0}$ ${{\mathit K}_L^0}$ ${{\mathit \gamma}}$
$4.29$ $\pm0.04$ $\pm0.07$ 4
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 5
AKHMETSHIN
2004
CMD2 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}_L^0}$ ${{\mathit K}_S^0}$
$4.21$ $\pm0.04$ 1900k 6
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 7
IVANOV
1981
OLYA 1$-$1.4 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.3$ $\pm0.6$ 7
CORDIER
1980
DM1 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}{{\mathit \pi}^{0}}$
$4.36$ $\pm0.29$ 3681 7
BUKIN
1978C
 OLYA ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ hadrons
$4.4$ $\pm0.6$ 984 7
BESCH
1974
CNTR 2 ${{\mathit \gamma}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit p}}{{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.67$ $\pm0.72$ 681 7
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. • •
$4.151$ $\pm0.018$ 8
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 9
IGNATOV
2024
CMD3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
$4.07$ $\pm0.13$ $\pm0.01$ 10
HOID
2020
RVUE ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \pi}^{0}}{{\mathit \gamma}}$
$4.23$ $\pm0.04$ $\pm0.02$ 11
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 12
AKHMETSHIN
2008
CMD2 1.02 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$
$4.28$ $\pm0.13$ 12540 13
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 7
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 13, 7
AKERLOF
1977
SPEC 400 ${{\mathit p}}$ ${}^{}\mathrm {A}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ X
$4.5$ $\pm0.8$ 500 13, 7
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 7
BORENSTEIN
1972
HBC 2.18 ${{\mathit K}^{-}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit K}}{{\overline{\mathit K}}}{{\mathit n}}$
1  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. The the first three points near the threshold are removed in the fit.
2  Average of KOZYREV 2016 and KOZYREV 2018 values taking into account the correlated uncertainties. Supersedes individual KOZYREV 2016 and KOZYREV 2018 results.
3  Using a vector meson dominance model with contribution from ${{\mathit \phi}{(1020)}}$ and higher mass excitations of ${{\mathit \rho}{(770)}}$, ${{\mathit \omega}{(782)}}$, and ${{\mathit \phi}{(1020)}}$.
4  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.
5  Update of AKHMETSHIN 1999D
6  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.
7  Width errors enlarged by us to 4${}\Gamma /\sqrt {\mathit N }$; see the note with the ${{\mathit K}^{*}{(892)}}$ mass.
8  From the fit to data of CMD3, BABAR and BES3.
9  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.
10  The values were extracted from a dispersively improved Breit-Wigner parameterization.
11  The values were extracted from a dispersively improved Breit-Wigner parameterization and do not include vacuum polarization.
12  Strongly correlated with AKHMETSHIN 2004.
13  Systematic errors not evaluated.
References