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Phys Rev Lett
; 121(5): 052001, 2018 Aug 03.
Artigo
em Inglês
| MEDLINE
| ID: mdl-30118290
RESUMO
Exclusive measurements of the quasifree ppâppπ^{+}π^{-} reaction have been carried out at WASA@COSY by means of pd collisions at T_{p}=1.2 GeV. Total and differential cross sections have been extracted covering the energy region T_{p}=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(J^{P})=2(1^{+}) produced associatedly with a pion is able to overcome these deficiencies.
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Enhanced emission of high-energy photons perpendicular to the reaction plane in alpha +Th reactions.
Phys Rev Lett
; 66(7): 872-875, 1991 Feb 18.
Artigo
em Inglês
| MEDLINE
| ID: mdl-10043928
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