Measurement of the eta -> 3 pi(0) Dalitz plot distribution with the WASA detector at COSY

WASA COSY Collaboration, C. Adolph, M. Angelstein, M. Bashkanov, U. Bechstedt, S. Belostotski, M. Berlowski, H. Bhatt, J. Bisplinghoff, A. Bondar, B. Borasoy, M. Buescher, H. Calen, K. Chandwani, H. Clement, E. Czerwinski, R. Czyzykiewicz, G. D'Orsaneo, D. Duniec, C. EkstroemR. Engels, W. Erven, W. Eyrich, P. Fedorets, O. Felden, K. Fransson, D. Gil, F. Goldenbaum, K. Grigoryev, A. Heczko, C. Hanhart, V. Hejny, F. Hinterberger, M. Hodana, B. Hoeistad, A. Izotov, M. Jacewicz, M. Janusz, B. R. Jany, L. Jarczyk, T. Johansson, B. Kamys, G. Kemmerling, I. Keshelashvili, O. Khakimova, A. Khoukaz, K. Kilian, N. Kimura, S. Kistryn, J. Klaja, P. Klaja

Research output: Contribution to journalArticlepeer-review

Abstract

In the first production run of the WASA experiment at COSY, the eta decay into three neutral pions was measured in proton-proton interactions at a proton beam kinetic energy of 1.4 GeV. The Dalitz plot of the three pious was Studied using 1.2 x 10(5) fully reconstructed events. and the quadratic slope parameter alpha was determined to be -0.027 +/- 0.008(stat) +/- 0.005(syst). The result is consistent with previous measurements and further corroborates the importance of pion-pion final state interactions. (C) 2009 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)24-29
Number of pages6
JournalPhysics Letters B
Volume677
Issue number1-2
DOIs
Publication statusPublished - 15 Jun 2009

Keywords

  • eta
  • eta -> 3 pi(0)
  • Dalitz plot
  • CHIRAL PERTURBATION-THEORY
  • FINAL-STATE INTERACTIONS
  • PI-PI SCATTERING
  • ELECTROMAGNETIC CORRECTIONS
  • CURRENT-ALGEBRA
  • DAQ SYSTEM
  • DECAYS
  • PERFORMANCE
  • ETA->3-PI
  • CHANNELS

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