Two-Pion production in the second resonance region in ${\pi }^{-}p$ collisions with HADES

Abstract

Pion induced reactions provide unique opportunities for an unambiguous description of baryonic resonances and their coupling channels by means of a partial wave analysis. Using the secondary pion beam at SIS18, the two pion production in the second resonance region has been investigated to unravel the role of the $N(1520){\frac{3}{2}}^{-}$ resonance in the intermediate $\rho$ production. Results on exclusive channels with one pion (${\pi }^{-}p$) and two pions (${\pi }^{+}{\pi }^{-}n$, ${\pi }^0{\pi }^{-}p$) in the final state measured in the ${\pi }^{-}-p$ reaction at four different pion beam momenta (0.650, 0.685, 0.733, and 0.786 GeV/c) are presented. The excitation function of the different partial waves and $\Delta \pi$, $N\sigma$ and $N\rho$ isobar configurations is obtained, using the Bonn-Gatchina partial wave analysis. The $N(1520){\frac{3}{2}}^{-}$ resonance is found to dominate the $N\rho$ final state with the branching ratio $BR=12.2\pm 1.9\%$.

References in corpus (5)

• Extended Partial-Wave Analysis of piN Scattering Data
• A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep\to e^{\prime }{\pi }^{+}{\pi }^{-}{p}^{\prime }$
• New results on the Roper resonance and the P_{11} partial wave
• Dilepton production in proton-induced reactions at SIS energies with the GiBUU transport model
• High-precision Measurements of piP Elastic Differential Cross Sections in the Second Resonance Region

Cited by in corpus (6)

• Light Baryon Spectroscopy
• Production and electromagnetic decay of hyperons: a feasibility study with HADES as a Phase-0 experiment at FAIR
• Note on the definitions of branching ratios of overlapping resonances
• Role of baryon resonances in the ${\pi }^{-}p\to n{e}^{+}{e}^{-}$ reaction within an effective-Lagrangian model
• Meson cloud contributions to the Dalitz decays of decuplet to octet baryons
• Dilepton Decay of Low-mass $\rho$ Mesons