Haas, P. (2024) Non-strange light-meson spectroscopy at COMPASS. Il nuovo cimento C, 47 (4). pp. 1-5. ISSN 1826-9885
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Abstract
Lattice QCD predicts the exotic meson π1(1600) to dominantly decay to b1π. The b1π decay channel is accessible via the ωπ−π0 final state. COMPASS recorded the so far largest data set of this final state. A partial-wave analysis allows to determine the resonant content in this final state including possible contributions from π1(1600). Decomposing the measured intensity into amplitudes of partial waves gives a first qualitative insight into contributing intermediate states. We observe signals in agreement with well-established states like the π(1800) and a4(1970). Smaller resonance-like signals are visible in the JP C sectors 3++ and 6++, where possible states were claimed but none are established. For JP C = 1−+ a signal at 1.65 GeV/c2 in b1(1235)π partial waves is consistent with the expected π1(1600).
| Item Type: | Article |
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| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 11 Sep 2024 15:18 |
| Last Modified: | 11 Sep 2024 15:18 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/23098 |
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