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Measurements of the parameters of the $\phi(1020)$ resonance through studies of the processes $e^+e^- \to K^+K^-$, $K_SK_L$ and $\pi^+\pi^-\pi^0$
High Energy Physics - Experiment · Submitted 14 Sep 2000
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The measured value of the $\phi$ meson total width, $\Gamma_{\phi} = 4.21 \pm 0.04$ is lower than the present world average of $4.458 \pm 0.032$ MeV.
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The abstract, sentence by sentence
The cross sections of the processes $e^+e^- \to K^+K^-$, $e^+e^- \to K_SK_L$ and $e^+e^- \to \pi^+\pi^-\pi^0$ were measured in the SND experiment at the VEPP-2M collider in the energy region near the $\phi(1020)$ meson. These measurements were based on about $10^6$ $K^+K^-$, $0.5 \times 10^6$ $K_SK_L$ and $0.4 \times 10^6$ $\pi^+\pi^-\pi^0$ selected events. Themeasured cross sections have been analyzed in the framework of the vector meson dominance model and the main parameters of the $\phi$-resonance were obtained, such as its mass, width, the production cross section and branching ratios of the main decay modes. The measured value of the $\phi$ meson total width, $\Gamma_{\phi} = 4.21 \pm 0.04$ is lower than the present world average of $4.458 \pm 0.032$ MeV. Contributions in addition to the conventional vector meson dominance model were found in the $e^+e^- \to \pi^+\pi^-\pi^0$ reaction cross section.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The cross sections of the processes $e^+e^- \to K^+K^-$, $e^+e^- \to K_SK_L$ and $e^+e^- \to \pi^+\pi^-\pi^0$ were measured in the SND experiment at the VEPP-2M collider in the energy region near the $\phi(1020)$ meson. | contribution 0.64 | 0.96 | 0.05 | asserted 1.00 |
| s1 | These measurements were based on about $10^6$ $K^+K^-$, $0.5 \times 10^6$ $K_SK_L$ and $0.4 \times 10^6$ $\pi^+\pi^-\pi^0$ selected events. | method 0.99 | 0.92 | 0.03 | asserted 1.00 |
| s2 | Themeasured cross sections have been analyzed in the framework of the vector meson dominance model and the main parameters of the $\phi$-resonance were obtained, such as its mass, width, the production cross section and branching ratios of the main decay modes. | method 0.62 | 0.95 | 0.33 | asserted 1.00 |
| s3 | The measured value of the $\phi$ meson total width, $\Gamma_{\phi} = 4.21 \pm 0.04$ is lower than the present world average of $4.458 \pm 0.032$ MeV. | result 0.99 | 0.92 | 0.39 | asserted 1.00 |
| s4 | Contributions in addition to the conventional vector meson dominance model were found in the $e^+e^- \to \pi^+\pi^-\pi^0$ reaction cross section. | result 0.98 | 0.93 | 0.16 | asserted 1.00 |
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The paper
Original abstract
The cross sections of the processes $e^+e^- \to K^+K^-$, $e^+e^- \to K_SK_L$ and $e^+e^- \to \pi^+\pi^-\pi^0$ were measured in the SND experiment at the VEPP-2M collider in the energy region near the $\phi(1020)$ meson. These measurements were based on about $10^6$ $K^+K^-$, $0.5 \times 10^6$ $K_SK_L$ and $0.4 \times 10^6$ $\pi^+\pi^-\pi^0$ selected events. Themeasured cross sections have been analyzed in the framework of the vector meson dominance model and the main parameters of the $\phi$-resonance were obtained, such as its mass, width, the production cross section and branching ratios of the main decay modes. The measured value of the $\phi$ meson total width, $\Gamma_{\phi} = 4.21 \pm 0.04$ is lower than the present world average of $4.458 \pm 0.032$ MeV. Contributions in addition to the conventional vector meson dominance model were found in the $e^+e^- \to \pi^+\pi^-\pi^0$ reaction cross section.
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References
How the literature uses it
9 arXiv papers cite this in 13 sentences
Papers citing it · 3 sentences without a confident label
Uses its data or values 4 papers
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In Sec. [ref], we perform a global fit of $C_A$ to data from SND [ref] , CMD-2 [ref] , and BaBar [ref] .
Extracting the chiral anomaly from $e^+e^-\to 3\pi$ · Introduction · 1.00
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To determine these, we perform fits to cross-section data for the charged and neutral timelike reactions $e^+e^-→K^+K^-$ [ref] and $e^+e^-→K_SK_L$ [ref] , respectively, as well as spacelike data for charged-kaon–electron scattering [ref] .
Kaon electromagnetic form factors in dispersion theory · Introduction · 1.00
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All other data sets from SND [ref] and CMD-2 [ref] are treated as described in Ref. [ref] , while the old data from DM1 [ref] , DM2 [ref] , and ND [ref] are no longer included.
Isospin-breaking effects in the three-pion contribution to hadronic vacuum polarization · Fits to data base prior to BaBar 2021 · 0.93
Compares with it 1 paper
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To demonstrate the advantage of wider windows, we compare results obtained from the simulations described in the Fermilab Lattice/HPQCD/MILC 2019 analysis of the HVP [ref] (along with those in Refs. [ref] ) with results obtained from the KNT19 analysis [ref] of $R_e^+e^-$ data [ref] .
Windows on the hadronic vacuum polarisation contribution to the muon anomalous magnetic moment · Introduction · 0.96
Cites it as background 3 papers
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These include the SND and CMD-2 experiments at the VEPP-2M collider [ref] , which measured the cross section up to 1.4by scanning the beam energy.
Measurement of the $e^+e^- \to \pi^+\pi^-\pi^0$ cross section in the energy range 0.62-3.50 GeV at Belle II · Introduction · 0.90
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In contrast, the $e^+e^-→K^+K^-$ process has a considerably shorter history starting from SND [ref] in 2001.
Two and Three Pseudoscalar Production in $e^{+}e^{-}$ annihilation and their contributions to $(g-2)_{\mu}$ · Introduction · 0.89
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Experimental data on the cross-section for $e^+e^-$ annihilation into hadrons and $R_e^+e^-$, the cross-section ratio between hadrons and muons in the final state, are available from several different experiments and for many different hadronic channels that open up once the centre-of-mass energy $√(s)>m_π^0$ [ref] .
Windows on the hadronic vacuum polarisation contribution to the muon anomalous magnetic moment · The HVP from $R_e^+e^-$ with a time-window · 0.91
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