Measurement of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ process cross section with the SND detector at the VEPP-2000 collider in the energy region $0.525<\sqrt{s}<0.883$ GeV

Abstract

The cross section of the process $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ has been measured in the Spherical Neutral Detector (SND) experiment at the VEPP-2000 $e^{+}{e}^{-}$ collider VEPP-2000 in the energy region $525<\sqrt[]{s}<883$ MeV. The measurement is based on data with an integrated luminosity of about 4.6 pb${}^{-1}$. The systematic uncertainty of the cross section determination is 0.8 % at $\sqrt{s}>0.600$ GeV. The $\rho$ meson parameters are obtained as $m_{\rho }=775.3\pm 0.5\pm 0.6$ MeV, ${\Gamma }_{\rho }=145.6\pm 0.6\pm 0.8$ MeV, $B_{\rho \to e^{+}{e}^{-}}\times B_{\rho \to {\pi }^{+}{\pi }^{-}}=(4.89\pm 0.02\pm 0.04)\times 10^{-5}$, and the parameters of the $e^{+}{e}^{-}\to \omega \to {\pi }^{+}{\pi }^{-}$ process, suppressed by $G$-parity, as $B_{\omega \to e^{+}{e}^{-}}\times B_{\omega \to {\pi }^{+}{\pi }^{-}}=(1.32\pm 0.06\pm 0.02)\times 10^{-6}$ and ${\varphi }_{\rho \omega }=110.7\pm 1.5\pm 1.0$ degrees.

References in corpus (6)

• Measurement of sigma(e+ e- -> pi+ pi-) from threshold to 0.85 GeV^2 using Initial State Radiation with the KLOE detector
• Measurement of the e+e- -> pi+pi- cross section with the CMD-2 detector in the 370-520 MeV c.m. energy range
• Backscattering of Laser Radiation on Ultra-Relativistic Electrons in Transverse Magnetic Field: Evidence of Photon Interference in a MeV Scale
• Search for the process $e^{+}{e}^{-}\to {\eta }^{\prime }(958)$ with the CMD-3 detector
• Electromagnetic form factor of pion in the field theory inspired approach
• Separation of $e^{+}{e}^{-}\to e^{+}{e}^{-}$ and $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ events using SND detector calorimeter

Cited by in corpus (20)

• Constraints on the two-pion contribution to hadronic vacuum polarization
• The anomalous magnetic moment of the muon in the Standard Model: an update
• Measurement of the $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ cross section from threshold to 1.2 GeV with the CMD-3 detector
• Measurement of the pion form factor with CMD-3 detector and its implication to the hadronic contribution to muon (g-2)
• Unveiling Hidden Physics at the LHC
• Tensions in $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}(\gamma )$ measurements: the new landscape of data-driven hadronic vacuum polarization predictions for the muon $g-2$
• Chiral extrapolation of hadronic vacuum polarization
• Model Independent Tests of the Hadronic Vacuum Polarization Contribution to the Muon $g$$-$$2$
• A ChPT estimate of the strong-isospin-breaking contribution to the anomalous magnetic moment of the muon
• Isospin breaking corrections in $2\pi$ production in tau decays and $e^{+}{e}^{-}$ annihilation: consequences for the muon $g-2$ and CVC tests
• Minimal model for the $W$-boson mass, $(g-2{)}_{\mu }$, $h\to {\mu }^{+}{\mu }^{-}$ and quark-mixing-matrix unitarity
• Radiative corrections and Monte Carlo tools for low-energy hadronic cross sections in $e^{+}{e}^{-}$ collisions
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Hadronic Light by Light Corrections to the Muon Anomalous Magnetic Moment
• Role of $\rho -\omega$ interference in semileptonic $B\to {\pi }^{+}{\pi }^{-}\ell {\bar{\nu }}_{\ell }$ decays
• Study of pion vector form factor and its contribution to the muon $(g-2)$
• Momentum-dependence of $\rho -\omega$ mixing in the pion vector form factor and its effect on $(g-2{)}_{\mu }$
• Tau data-driven evaluation of the Hadronic Vacuum Polarization
• Tau Data-Based Evaluations of the hadronic vacuum polarization contribution to the muon $g-2$
• Structure-dependent radiative corrections to $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}\gamma$ in the GVMD approach