ABC Effect and Resonance Structure in the Double-Pionic Fusion to He-3

WASA-at-COSY Collaboration, E. Perez del Rio*, M. Bashkanov, H. Clement, E. Doroshkevich, A. Pricking, T. Skorodko, G. J. Wagner

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Historically the double-pionic fusion to 3He is the reaction, where the ABC effect (low-mass enhancement of the pi pi-invariant mass spectrum) was observed for the first time more than 50 years ago. Meanwhile exclusive and kinematically complete high-statistics measurements with WASA at COSY revealed a strict correlation between the ABC effect and a narrow resonance structure with I(J(P)) = 0(3(+)) in the total cross section of the most basic double-pionic fusion, the pn -> d pi(0)pi(0) reaction. In order to investigate the situation in the double-pionic fusion to 3He the energy dependence of the ABC effect in the fusion to He-3 has been measured by fixed energy measurements of the type pd -> He-3 pi pi as well as by quasifree and coherent measurements of the type dd -> He-3 n pi pi.

Original languageEnglish
Title of host publicationMESON 2012 - 12TH INTERNATIONAL WORKSHOP ON PRODUCTION, PROPERTIES AND INTERACTION OF MESONS
EditorsA Wronska, R Skibinski, C Guaraldo, S Kistryn, H Stroher
PublisherE D P SCIENCES
Number of pages3
DOIs
Publication statusPublished - 6 Dec 2012
Event12th International Workshop on Meson Production, Properties and Interaction (MESON) - Cracow, Poland
Duration: 31 May 20125 Jun 2012

Publication series

NameEPJ Web of Conferences
PublisherE D P SCIENCES
Volume37
ISSN (Print)2100-014X

Conference

Conference12th International Workshop on Meson Production, Properties and Interaction (MESON)
Country/TerritoryPoland
CityCracow
Period31/05/125/06/12

Keywords

  • GEV-C
  • MESON PRODUCTION
  • PI-PI
  • COLLISIONS
  • ISOSPIN
  • ENHANCEMENT

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