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)32− resonance in the intermediate ρ-meson production. Results on exclusive channels with one pion (π−p) and two pions (π+π−n, π0π−p) in the final state measured in the π−−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 Δπ, Nσ, and Nρ isobar configurations is obtained, using the Bonn-Gatchina partial-wave analysis. The N(1520)32− resonance is found to dominate the Nρ final state with the branching ratio BR=12.2%±1.9%.5 MoreReceived 20 April 2020Accepted 22 June 2020DOI:https://doi.org/10.1103/PhysRevC.102.024001©2020 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasMeson & hyperon induced nuclear reactionsNuclear many-body theoryParticle interactionsPhysical SystemsBaryonsNuclear Physics
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