Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction

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2019 | Bardan, W.

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DOI Доступ к ресурсу на сайте издателя			10.1103/PhysRevC.99.025201

Title: Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction
Creator: Augustyniak, W.
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Bardan, W.
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Bashkanov, M.
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Bergmann, F. S.
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Berłowski, M.
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Bondar, A.
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Büscher, M.
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Calén, H.
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Ciepał, I.
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Clement, H.
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Czerwinski, E.
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Demmich, K.
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Engels, R.
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Erven, A.
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Skorodko, T.
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Adlarson, P.
Date: 2019
DOI: 10.1103/PhysRevC.99.025201
Description: Exclusive measurements of the quasi-free $pp o pppi^+pi^-$ reaction have been performed by means of $pd$ collisions at $T_p$ = 1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region $T_p = 1.08 - 1.36$ GeV ($sqrt s$ = 2.35 - 2.46 GeV), which includes the regions of $N^*(1440)$ and $Delta(1232)Delta(1232)$ resonance excitations. Calculations describing these excitations by $t$-channel meson exchange are at variance with experimental differential cross sections and underpredict substantially the measured total cross section. An isotensor $Delta N$ dibaryon resonance with $I(J^P) = 2(1^+)$ produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong and more recently calculated by Gal and Garcilazo.

Created: 06-03-2020

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Физический факультет Examination of the production of an isotensor dibaryon in the pp → ppπ+π− reaction