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| Home > Publications database > An Isotensor Dibaryon in the p p → p p π + π − Reaction? |
| Home > Publications database > An Isotensor Dibaryon in the p p → p p π + π − Reaction? |
| Journal Article | FZJ-2018-05719 |
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2018
APS
College Park, Md.
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Please use a persistent id in citations: http://hdl.handle.net/2128/19773 doi:10.1103/PhysRevLett.121.052001
Abstract: Exclusive measurements of the quasifree pp→ppπ+π− reaction have been carried out at WASA@COSY by means of pd collisions at Tp=1.2 GeV. Total and differential cross sections have been extracted covering the energy region Tp=1.08–1.36 GeV, which is the region of N∗(1440) and Δ(1232)Δ(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange are at variance with the measured differential cross sections and underpredict substantially the experimental total cross section. An isotensor ΔN dibaryon resonance with I(JP)=2(1+) produced associatedly with a pion is able to overcome these deficiencies.
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