2026-08-16T17:30:05Zhttps://docta.ucm.es/rest/oai/request

oai: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. © 2007 Elsevier B.V. This work was supported in part by grants FPA 2004-02602, 2005-02327, PR27/05-13955-BSCH (Spain) and US DOE DEFG02 97ER41048 and DE-FG02-03ER41260 . 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 2007-09-30 journal article 0370-2693 10.1016/j.physletb.2007.08.015 https://hdl.handle.net/20.500.14352/50793 http://dx.doi.org/10.1016/j.physletb.2007.08.015 http://arxiv.org/abs/0707.1286 http://www.sciencedirect.com eng FPA 2004-02602 2005-02327 PR27/05-13955-BSCH (Spain) DE-FG02-03ER41260 DE-FG02-97ER41048 open access Elsevier Science BV