Υ{hooked}′ (10.01) resonance parameters

B. Niczyporuk, T. Zełudziewicz, K. W. Chen, R. Hartung, H. Vogel, H. Wegener, J. K. Bienlein, R. Graumann, J. Krüger, M. Leissner, M. Schmitz, F. H. Heimlich, R. Nernst, A. Schwarz, U. Strohbusch, P. Zschorsch, A. Engler, R. W. Kraemer, F. Messing, C. RippichB. Stacey, S. Youssef, A. Fridman, G. Alexander, A. Av-Shalom, G. Bella, Y. Gnat, J. Grunhaus, E. Hörber, W. Langguth, M. Scheer

Research output: Contribution to journalArticlepeer-review

Abstract

The resonance parameters of the Υ{hooked}′(10.01) were measured using the LENA detector at the DORIS e+e- storage ring. We obtained a mass of M(Υ{hooked}′) = (10 013.6 ± 1.2 ± 10.0) MeV and an electronic width of Γee(Υ{hooked}′) = (0.53 ± 0.07-0.05+0.09 keV. The upper limit set to the μ-pair branching ratio is 3.8% which implies a lower limit on the total Υ{hooked}′ width of 14 keV. Together with out previous measurement of the Υ{hooked} parameters we obtain a mass difference M(Υ{hooked}′) - M(Υ{hooked}) = (552.0 ± 1.3 ± 10.0) MeV and Γee(Υ{hooked}′) Γee(Υ{hooked}) = 0.43 ± 0.07-0.00+0.05.

Original languageEnglish
Pages (from-to)169-173
Number of pages5
JournalPhysics Letters B
Volume99
Issue number2
DOIs
StatePublished - 12 Feb 1981

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