Study of the reaction $e^{+}{e}^{-}\to {\pi }^0\gamma$ with the SND detector at the VEPP-2M collider

Abstract

The process $e^{+}{e}^{-}\to {\pi }^0\gamma$ has been studied in the experiment with the SND detector at the VEPP-2M $e^{+}{e}^{-}$ collider. The $e^{+}{e}^{-}\to {\pi }^0\gamma$ cross section has been measured in the center-of-mass energy range from 0.60 to 1.38 GeV. The cross section is well described by the vector meson dominance model. From the fit to the cross section data we have determined the branching fractions $B(\rho \to {\pi }^0\gamma )=(4.20\pm 0.52)\times 10^{-4}$, $B(\omega \to {\pi }^0\gamma )=(8.88\pm 0.18)\%$, $B(\varphi \to {\pi }^0\gamma )=(1.367\pm 0.072)\times 10^{-3}$, and the relative phase between the $\rho$ and $\omega$ amplitudes ${\phi }_{\rho }=(-12.7\pm 4.5{)}^{\circ }$. Our data on the process $e^{+}{e}^{-}\to {\pi }^0\gamma$ are the most accurate to date.

12 pages, 5 figures

References in corpus (3)

• Study of the process e+e- -> omega pi0 in the phi-meson mass region with the KLOE detector
• Measurement of the $e^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ cross section in the center-of-mass energy range 1.22--2.00 GeV with the SND detector at the VEPP-2000 collider
• Overview of the hadronic light-by-light contribution to the muon (g-2)

Cited by in corpus (22)

• The anomalous magnetic moment of the muon in the Standard Model
• The muon $g-2$ and $\alpha (M_Z^2)$: a new data-based analysis
• Muon g-2 Theory: the Hadronic Part
• Updated measurement of the $e^{+}{e}^{-}\to \omega {\pi }^0\to {\pi }^0{\pi }^0\gamma$ cross section with the SND detector
• Modeling interactions of photons with pseudoscalar and vector mesons
• The hadronic light-by-light contribution to the muon's anomalous magnetic moment
• The $\gamma \pi \to \pi \pi$ anomaly from lattice QCD and dispersion relations
• Hadronic Footprint of GeV-Mass Dark Matter
• BHLS${}_2$, a New Breaking of the HLS Model and its Phenomenology
• Higher-order hadronic-vacuum-polarization contribution to the muon g-2 from lattice QCD
• Measurement of the $e^{+}{e}^{-}\to {\pi }^0\gamma$ cross section in the energy range 1.075--2 GeV at SND
• Hazma Meets HERWIG4DM: Precision Gamma-Ray, Neutrino, and Positron Spectra for Light Dark Matter
• Two-photon decays and transition form factors of ${\pi }^0$, $\eta$, and ${\eta }^{\prime }$ in large-$N_c$ chiral perturbation theory
• Study of the process $e^{+}{e}^{-}\to \eta {\pi }^0\gamma$ in the energy range $\sqrt{s} = \mbox{1.05-2.00}$ GeV with the SND detector
• Measurement of hadron cross sections with the SND detector
• Non-Abelian axial anomaly, axial-vector duality, and the pseudoscalar glueball
• Gauge Technique approximation to the $\pi \gamma$ production and the pion transition form factor
• Analysis of the $e^{+}{e}^{-}\to {\pi }^0\gamma$ process using anomaly sum rules approach
• Photon radiation in $e^{+}{e}^{-}\to$ hadrons at low energies with CARLOMAT 3.1
• Modeling the $R$-ratio and hadronic contributions to $g-2$ with a Treed Gaussian Process
• The Forward Physics Facility at the High-Luminosity LHC
• Subleading hadronic vacuum polarization contributions to muon $g-2$: ${\mu }^{+}{\mu }^{-}\to {\gamma }^{\ast }\to {\pi }^0{\gamma }^{\ast }$