Strange-Meson Spectroscopy with COMPASS
| Autor: | Wallner, S. |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Nuovo Cim.C 47 (2024) 4, 149 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1393/ncc/i2024-24149-1 |
| Popis: | While the spectrum of non-strange light mesons is well known, many predicted strange mesons have not yet been observed, and many potentially observed states require further confirmation. Using the $K^-$ component of the hadron beam at the M2 beamline at CERN, we study the strange-meson spectrum with the COMPASS experiment. The flagship channel is the $K^-\pi^-\pi^+$ final state, for which COMPASS has obtained the world's largest sample. Based on this sample, we have performed the most detailed and comprehensive partial-wave analysis of this final state to date. For example, we observe a clear signal from the well-known $K_2^*(1430)$, and for the first time we study the $K_2(1770)$, $K_2(1820)$, and $K_2(2250)$ in a single analysis. We also find evidence for a supernumerary signal called $K(1630)$, suggesting that this signal is a pseudoscalar exotic strange meson. Comment: 20th International Conference on Hadron Spectroscopy and Structure (HADRON 2023); Il Nuovo Cimento C, Colloquia and Communications in Physics |
| Databáze: | arXiv |
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