Journal of University of Science and Technology of China ›› 2016, Vol. 46 ›› Issue (4): 282-285.DOI: 10.3969/j.issn.0253-2778.2016.04.004

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Recent results from the KEDR detector at the VEPP-4M

TODYSHEV K.Yu.   

  1. 1.Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia; 2.Novosibirsk State University, Novosibirsk 630090, Russia
  • Received:2015-11-30 Revised:2016-04-20 Online:2016-04-30 Published:2016-04-30

Abstract: The result is presented of precise measurement the values of Ruds and R at seven points of the center-of-mass energy between 312 and 372 GeV based on the data collected with the KEDR detector at the VEPP-4M e+e- collider in Novosibirsk. Also present is the preliminary result of determination of the product of the electron partial width by the branching fraction into hadrons of J/ψ resonance.

Key words: R measurement, J/ψ resonance, charmonium