Double-pion production in nucleon collisions on few-body systems - The abc effect and its possible origin

Mikhail Bashkanov

Double-pion production in nucleon collisions on few-body systems - The abc effect and its possible origin

Mikhail Bashkanov^*

^*Corresponding author for this work

Physics

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

Abstract

The ABC effect - an intriguing low-mass enhancement in the ππ invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear fusion reactions. Exclusive measurements have been carried out at CELSIUS/WASA and WASA@COSY for the fusion reactions leading to d, ³He and ⁴He. They all reveal this effect to be a σ channel phenomenon combined with a resonance-like behavior in the total cross section. The latter points to the formation of an isoscalar dibaryonic resonance, which couples to the pn channel as well as to a δδ intermediate state.

Original language	English
Pages (from-to)	255-262
Number of pages	8
Journal	International Journal of Modern Physics A
Volume	24
Issue number	2-3
Publication status	Published - 30 Jan 2009

Keywords

δδ excitation
σ channel
ABC effect
Dibaryon resonance
Pn channel

Cite this

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abstract = "The ABC effect - an intriguing low-mass enhancement in the ππ invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear fusion reactions. Exclusive measurements have been carried out at CELSIUS/WASA and WASA@COSY for the fusion reactions leading to d, 3He and 4He. They all reveal this effect to be a σ channel phenomenon combined with a resonance-like behavior in the total cross section. The latter points to the formation of an isoscalar dibaryonic resonance, which couples to the pn channel as well as to a δδ intermediate state.",

keywords = "δδ excitation, σ channel, ABC effect, Dibaryon resonance, Pn channel",

author = "Mikhail Bashkanov",

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AU - Bashkanov, Mikhail

PY - 2009/1/30

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N2 - The ABC effect - an intriguing low-mass enhancement in the ππ invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear fusion reactions. Exclusive measurements have been carried out at CELSIUS/WASA and WASA@COSY for the fusion reactions leading to d, 3He and 4He. They all reveal this effect to be a σ channel phenomenon combined with a resonance-like behavior in the total cross section. The latter points to the formation of an isoscalar dibaryonic resonance, which couples to the pn channel as well as to a δδ intermediate state.

AB - The ABC effect - an intriguing low-mass enhancement in the ππ invariant mass spectrum - is known from inclusive measurements of two-pion production in nuclear fusion reactions. Exclusive measurements have been carried out at CELSIUS/WASA and WASA@COSY for the fusion reactions leading to d, 3He and 4He. They all reveal this effect to be a σ channel phenomenon combined with a resonance-like behavior in the total cross section. The latter points to the formation of an isoscalar dibaryonic resonance, which couples to the pn channel as well as to a δδ intermediate state.

KW - δδ excitation

KW - σ channel

KW - ABC effect

KW - Dibaryon resonance

KW - Pn channel

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AN - SCOPUS:65249140619

SN - 0217-751X

VL - 24

SP - 255

EP - 262

JO - International Journal of Modern Physics A

JF - International Journal of Modern Physics A

IS - 2-3

ER -

Double-pion production in nucleon collisions on few-body systems - The abc effect and its possible origin

Abstract

Keywords

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