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An Isotensor Dibaryon in the $pp \to pp\pi^+\pi^-$ Reaction?
- Source :
- Phys. Rev. Lett. 121, 052001 (2018)
- Publication Year :
- 2018
-
Abstract
- Exclusive measurements of the quasi-free $pp \to pp\pi^+\pi^-$ 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 $\Delta(1232)\Delta(1232)$ 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 $\Delta N$ dibaryon resonance with $I(J^P) = 2(1^+)$ produced associatedly with a pion is able to overcome these deficiencies.<br />Comment: arXiv admin note: substantial text overlap with arXiv:1803.03192
- Subjects :
- Nuclear Experiment
High Energy Physics - Experiment
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 121, 052001 (2018)
- Publication Type :
- Report
- Accession number :
- edsarx.1803.03193
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.121.052001