Study of the process e+e-\to μ+μ- in the energy region \sqrt{s}=980, 1040 -- 1380 MeV

Abstract

The cross section of the process e+e-\toμ+μ- was measured in the SND experiment at the VEPP-2M e+e- collider in the energy region \sqrt{s}=980, 1040 -- 1380 MeV. The event numbers of the process e+e-\toμ+μ- were normalized to the integrated luminosity measured using e+e-\to e+e- and e+e-\toγγprocesses. The ratio of the measured cross section to the theoretically predicted value is 1.006\pm 0.007 \pm 0.016 and 1.005 \pm 0.007 \pm 0.018 in the first and second case respectively. Using results of the measurements, the electromagnetic running coupling constant αin the energy region \sqrt{s}=1040 -- 1380 MeV was obtained <1/α> = 134.1\pm 0.5 \pm 1.2 and this is in agreement with theoretical expectation.

arXiv comment29 pages, 23 figures

References in corpus (11)

• BHWIDE 1.00: O(alpha) YFS Exponentiated Monte Carlo for Bhabha Scattering at Wide Angles for LEP1/SLC and LEP2
• Measurement of the e+e- -> pi+pi- cross section with the CMD-2 detector in the 370-520 MeV c.m. energy range
• Tests of the Standard Model and Constraints on New Physics from Measurements of Fermion-Pair Production at 189-209 GeV at LEP
• Spherical Neutral Detector for VEPP-2M collider
• Measurement of the Pion Form Factor in the Energy Range 1.04-1.38 GeV with the CMD-2 Detector
• Measurements of the parameters of the $\varphi (1020)$ resonance through studies of the processes $e^{+}{e}^{-}\to K^{+}{K}^{-}$, $K_S{K}_L$ and ${\pi }^{+}{\pi }^{-}{\pi }^0$
• Large angle QED processes at e^+e^- colliders at energies below 3 GeV
• The cross sections of the muons and charged pions pairs production at electron-positron annihilation near the threshold
• Measurement of the leptonic decay widths of the phi-meson with the KLOE detector
• Measurement of the decay phi->mu+mu-
• Direct measurement of the phi(1020) leptonic branching ratio

Cited by in corpus (2)

• Search for Lepton Flavor Violation Process e^+e^- \to eμin the Energy Region \sqrt{s}=984 -- 1060 MeV and ϕ\to eμDecay
• Bounds to strong gravity from electron-positron annihilations near threshold