Observation of three P states in the radiative decay of (2S)

R. Nernst, 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, D. De Judicibus, C. Edwards, A. Engler, G. Folger, A. FridmanJ. Gaiser, D. Gelphman, 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. Lekebusch, P. Lezoch, A. M. Litke, W. Lockman, S. Lowe, B. Lurz, D. Marlow, W. Maschmann, T. Matsui, F. Messing, W. J. Metzger, B. Monteleoni, 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, U. Volland, K. Wacker, W. Walk, H. Wegener, D. Williams, P. Zschorsch

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


The inclusive photon spectrum in hadronic decays of the (2S) is measured with the Crystal Ball detector at DORIS II. Four well separated photon lines, which are consistent with the decay hypothesis (2S)+P2,1,03 and P2,13(1S), are observed. The energies of the lines from the primary transitions are E1=110.4±0.8±2.2 MeV, E2=130.6±0.8±2.4 MeV, and E3=163.8±1.6±2.7 MeV; the branching fractions are (5.8±0.7±1.0)%, (6.5±0.7±1.2)%, and (3.6±0.8±0.9)%, respectively. The secondary transitions center at E430 MeV with a combined branching fraction of (3.6±0.7±0.5)%.

Original languageEnglish (US)
Pages (from-to)2195-2198
Number of pages4
JournalPhysical review letters
Issue number20
StatePublished - 1985
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'Observation of three P states in the radiative decay of (2S)'. Together they form a unique fingerprint.

Cite this