χb states in exclusive radiative decay of the γ(2S)

W. Walk, P. Zschorsch, 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, 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, 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, H. Wegener, D. Williams

Research output: Contribution to journalArticle

15 Scopus citations

Abstract

The Crystal Ball detector at the DESY storage ring DORIS II has been used to study radiative decays of the (2S) resonance. We report on the analysis of the exclusive channel (2S)b, b(1S)e+e- or +-. We detect two b states by observing two monochromatic photon lines at energies (107.01.11.3) MeV and (131.70.91.3) MeV, respectively. The product branching ratios B[(2S)b]×B[b(1S)] are (1.60.30.2)% for the first state and (2.10.30.3)% for the second. For the product branching ratio of the third b state, which has been observed in inclusive measurements, we find an upper limit of 0.2% (90% C.L.). Combining our results with inclusive measurements, branching ratios for b(1S) are derived. Using theoretical estimates for the radiative widths of the b states, we determine their hadronic widths; the results are compared with QCD predictions.

Original languageEnglish (US)
Pages (from-to)2611-2620
Number of pages10
JournalPhysical Review D
Volume34
Issue number9
DOIs
StatePublished - Jan 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'χb states in exclusive radiative decay of the γ(2S)'. Together they form a unique fingerprint.

  • Cite this

    Walk, W., Zschorsch, P., Antreasyan, D., Aschman, D., Besset, D., Bienlein, J. K., Bloom, E. D., Brock, I., Cabenda, R., Cartacci, A., Cavalli-Sforza, M., Clare, R., Conforto, G., Cooper, S., Cowan, R., Coyne, D., Edwards, C., Engler, A., Folger, G., ... Williams, D. (1986). χb states in exclusive radiative decay of the γ(2S). Physical Review D, 34(9), 2611-2620. https://doi.org/10.1103/PhysRevD.34.2611