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Determination of the ϒ(1S) leptonic width

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Zeitschrift für Physik C Particles and Fields

Abstract

Analyzing the data recorded with the MD-1 detector operated at the VEPP-4 storage ring we have determined the ϒ(1S) resonance leptonic partial width and mass. We find

$$\begin{gathered} \Gamma _{ee} = 1.29 \pm 0.03 \pm 0.03keV, \hfill \\ M = 9460.59 \pm 0.09 \pm 0.05MeV/c^2 \hfill \\ \end{gathered} $$

M=9460.59±0.09±0.05 MeV/c2. This new value of the ϒ(1S) mass should supersede the previously published value [11] based on almost the same statistics.

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  1. Budker Institute of Nuclear Physics, 630090, Novosibirsk, Russian Federation

    S. E. Baru, A. E. Blinov, V. E. Blinov, A. E. Bondar, A. D. Bukin, V. R. Groshev, S. G. Klimenko, G. M. Kolachev, A. P. Onuchin, V. S. Panin, I. Ya. Protopopov, A. G. Shamov, V. A. Sidorov, Yu. I. Skovpen, A. N. Skrinsky, V. A. Tayursky, V. I. Telnov, Yu. A. Tikhonov, G. M. Tumaikin, A. E. Undrus, A. I. Vorobiov & V. N. Zhilich

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  18. Yu. A. Tikhonov
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Baru, S.E., Blinov, A.E., Blinov, V.E. et al. Determination of the ϒ(1S) leptonic width. Z. Phys. C - Particles and Fields 56, 547–552 (1992). https://doi.org/10.1007/BF01474726

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  • DOI: https://doi.org/10.1007/BF01474726

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