Measurement of the decay (2S)(1S)

D. Gelphman, B. Lurz, D. Antreasyan, D. Aschman, D. Besset, J. K. Bienlein, E. D. Bloom, I. Brock, R. Cabenda, A. Cartacci, M. Cavalli-Sforza, R. Clare, G. Conforto, S. Cooper, R. Cowan, D. Coyne, C. Edwards, A. Engler, G. Folger, A. FridmanJ. Gaiser, G. Godfrey, F. H. Heimlich, R. Hofstadter, J. Irion, Z. Jakubowski, S. Keh, H. Kilian, I. Kirkbride, T. Kloiber, W. Koch, A. C. König, K. Königsmann, R. W. Kraemer, R. Lee, S. Leffler, R. Lekebush, P. Lezoch, A. M. Litke, W. Lockman, S. Lowe, D. Marlow, W. Maschmann, T. Matsui, F. Messing, W. J. Metzger, B. Monteleoni, R. Nernst, C. Newman-Holmes, B. Niczyporuk, G. Nowak, C. Peck, P. G. Pelfer, B. Pollock, F. C. Porter, D. Prindle, P. Ratoff, B. Renger, C. Rippich, M. Scheer, P. Schmitt, M. Schmitz, J. Schotanus, A. Schwarz, D. Sievers, T. Skwarnicki, K. Strauch, U. Strohbusch, J. Tompkins, H. J. Trost, R. T. Van De Walle, H. Vogel, U. Volland, K. Wacker, W. Walk, H. Wegener, D. Williams, P. Zschorsch

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


We have investigated the hadronic transitions (2S)00(1S)l +l- (l= or e) and (2S)+-(1S)+ e+-e- using the Crystal Ball detector at the DESY e+e- storage ring DORIS II. Using the present world-average value of Bll((1S))=2.90.3)% we derive branching ratios B((2S)00(1S))= (8.01.5)% and B((2S)+-(1S))= (16.94.0)%. We also present results on the invariant-mass spectra and the angular distributions of the dipion system.

Original languageEnglish (US)
Pages (from-to)2893-2900
Number of pages8
JournalPhysical Review D
Issue number11
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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