Two-pion production in the second resonance region in pi(-)p collisions with the High-Acceptance Di-Electron Spectrometer (HADES)

0531990 - ÚJF 2021 RIV US eng J - Journal Article
Adamczewski-Musch, J. - Arnold, O. - Atomssa, E. T. - Behnke, C. - Belounnas, A. - Chlad, Lukáš - Chudoba, Petr - Kugler, Andrej - Mikhaylov, Vasily - Prozorov, Alexandr P. - Rodriguez Ramos, Pablo - Svoboda, Ondřej - Tlustý, Pavel - Wagner, Vladimír … Total 122 authors
Two-pion production in the second resonance region in pi(-)p collisions with the High-Acceptance Di-Electron Spectrometer (HADES).
Physical Review C. Roč. 102, č. 2 (2020), č. článku 024001. ISSN 2469-9985. E-ISSN 2469-9993
R&D Projects: GA MŠMT EF16_013/0001677; GA MŠMT LTT17003
Research Infrastructure: FAIR-CZ II - 90112
Institutional support: RVO:61389005
Keywords : meson and hyperon induced nuclear reactions * nuclear many-body theory * particle interactions
OECD category: Nuclear physics
Impact factor: 3.296, year: 2020
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevC.102.024001

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) 3/2(-) resonance in the intermediate rho-meson 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)3/2(-) resonance is found to dominate the N rho final state with the branching ratio BR = 12.2% +/- 1.9%.
Permanent Link: http://hdl.handle.net/11104/0310603