New precision measurement of the J/ψ- and ψ′-meson masses
- 作者：Aulchenko ; V.M. ; Balashov ; S.A. ; Baldin ; E.M. ; Barnyakov ; M.Yu. ; Baru ; S.E. ; Bedny ; I.V. ; Beloborodova ; O.L. ; et. al.
- 关键词：13.66.Bc ; 14.40.Gx ; 29.20 ; 29.27.Hj ; Energy calibration ; Depolarization technique ; Mass measurement ; J/ψ ; -meson ; ψ ; &prime ; -meson
- 刊名：Physics Letters B
- 出版年：2003
- 期刊代码：58_03702693
- 类别：ph
- 出版时间：October 30, 2003
- 卷：573
- 期：Complete
- 页码：63-79
- 文件大小：379 K
摘要
A new high precision measurement of the J/ψ- and ψ′-meson masses has been performed at the VEPP-4M collider using the KEDR detector. The resonant depolarization method has been employed for the absolute calibration of the beam energy. The following mass values have been obtained: Formula Not Shown The relative measurement accuracy has reached 4×10−6 for J/ψ and 7×10−6 for ψ′, approximately 3 times better than in the previous precise experiments.