2026-08-01T01:47:06Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/507932023-08-27T12:52:52Zcom_20.500.14352_14col_20.500.14352_15
Light 1(-+) exotics: molecular resonances
Llanes Estrada, Felipe José
General, Ignacio J.
Wang, Ping
Cotanch, Stephen R.
Highlights in the search for nonconventional (non-q.q) meson states are the π1(1400) and π1(1600) exotic candidates. Should they exist, mounting theoretical arguments suggest that they are tetraquark molecular resonances excitable by meson rescattering.We report a new tetraquark calculation within a model field theory approximation to Quantum Chromodynamics in the Coulomb gauge supporting this conjecture. We also strengthen this claim by consistentlycontrasting results with exotic state predictions for hybrid (q . qg) mesons within the same theoretical framework. Our findings confirm that molecular like configurations involving two color singlets (a resonance, not a bound state) are clearly favored over hybrid or color-exotic tetraquark meson (q . qq.q atoms) formation. Finally, to assist needed further experimental searches we document a useful off-plane correlator for establishing the structure of these exotic systems along with similar, but anticipated much narrower, states that should exist in the charmonium and bottomonium spectra.
2023-06-20T10:37:12Z
2023-06-20T10:37:12Z
2023-06-20T10:37:12Z
2007-09-30
journal article
https://hdl.handle.net/20.500.14352/50793
0370-2693
10.1016/j.physletb.2007.08.015
eng
FPA 2004-02602
2005-02327
PR27/05-13955-BSCH (Spain)
DE-FG02-03ER41260
DE-FG02-97ER41048
open access
Elsevier Science BV