First observation of the reaction γγ→π2→π0π0π0

D. Antreasyan, H. W. Bartels, D. Besset, Ch Bieler, J. K. Bienlein, A. Bizzeti, E. D. Bloom, I. Brock, K. Brockmüller, R. Cabenda, A. Cartacci, M. Cavalli-Sforza, R. Clare, A. Compagnucci, G. Conforto, S. Cooper, R. Cowan, D. Coyne, A. Engler, K. FairfieldG. Folger, A. Fridman, J. Gaiser, D. Gelphman, G. Glaser, G. Godfrey, K. Graaf, F. H. Heimlich, F. H. Heinsius, R. Hofstadter, J. Irion, Z. Jakubowski, H. Janssen, K. Karch, S. Keh, T. Kiel, H. Kilian, I. Kirkbride, T. Kloiber, M. Kobel, W. Koch, A. C. König, K. Königsmann, R. W. Kraemer, S. Krüger, G. Landi, R. Lee, S. Leffler, R. Lekebusch, A. M. Litke, W. Lockman, S. Lowe, B. Lurz, D. Marlow, H. Marsiske, W. Maschmann, P. McBride, F. Messing, W. J. Metzger, H. Meyer, B. Monteleoni, B. Muryn, R. Nernst, B. Niczyporuk, G. Nowak, C. Peck, P. G. Pelfer, B. Pollock, F. C. Porter, D. Prindle, P. Ratoff, M. Reidenbach, B. Renger, C. Rippich, M. Scheer, P. Schmitt, J. Schotanus, J. Schütte, A. Schwarz, D. Sievers, T. Skwarnicki, V. Stock, K. Strauch, U. Strohbusch, J. Tompkins, H. J. Trost, B. van Uitert, R. T. Van de Walle, H. Vogel, A. Voigt, U. Volland, K. Wachs, K. Wacker, W. Walk, H. Wegener, D. A. Williams, P. Zschorsch

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

The Crystal Ball detector has been used at the DORIS II storage ring at DESY to study the reaction γγ→π0π0π0 in the π0π0π0 invariant mass range from 850 MeV/c2 to 2600 MeV/c2. An enhancement around 1750 MeV/c2 is attributed to the π2(1670) resonance. The observed π0π0 invariant mass distribution and the π0 angular distributions are consistent with those expected for the decay chain π2→π0f2(1270)→π0π0π0. From our measurements we find the following resonance parameters: two photon partial width {Mathematical expression}, mass M(π2)=(1742±31±49)MeV/c2. and total width {Mathematical expression}.

Original languageEnglish (US)
Pages (from-to)561-568
Number of pages8
JournalZeitschrift für Physik C Particles and Fields
Volume48
Issue number4
DOIs
StatePublished - Dec 1 1990
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Antreasyan, D., Bartels, H. W., Besset, D., Bieler, C., Bienlein, J. K., Bizzeti, A., Bloom, E. D., Brock, I., Brockmüller, K., Cabenda, R., Cartacci, A., Cavalli-Sforza, M., Clare, R., Compagnucci, A., Conforto, G., Cooper, S., Cowan, R., Coyne, D., Engler, A., ... Zschorsch, P. (1990). First observation of the reaction γγ→π2→π0π0π0. Zeitschrift für Physik C Particles and Fields, 48(4), 561-568. https://doi.org/10.1007/BF01614689