Study of few-body problems at WASA - The ABC phenomenon

M. Bashkanov; WASA-at-COSY Collaboration

doi:10.1051/epjconf/20100303011

Study of few-body problems at WASA - The ABC phenomenon

M. Bashkanov^*, WASA-at-COSY Collaboration

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

Abstract

A short overview over the ongoing few-body program at WASA@COSY is given with special emphasis on the ABC phenomenon, which is known since 50 years without having found a consistent explanation. We show that this phenomenon is linked with a resonant energy dependence in the total cross section of isoscalar double-pionic fusion processes. This resonance structure is connected with the baryon-baryon system, in particular with the pn and ΔΔ systems, however, possesses a mass, which is 90 MeV below the nominal ΔΔ threshold and has a width of only 50 MeV, i. e., five times smaller than expected from a conventional t-channel ΔΔ process.

Original language	English
Article number	03011
Journal	EPJ Web of Conferences
Volume	3
DOIs	https://doi.org/10.1051/epjconf/20100303011
Publication status	Published - 1 Jan 2010

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Study of few-body problems at WASA - The ABC phenomenon

Abstract

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