Llanes Estrada, Felipe JoséCotanch, SteveGeneral, IgnacioWang, Ping2023-06-202023-06-2020081. F.J. Llanes-Estrada and S.R. Cotanch, Phys. Rev. Lett. 84, 1102 (2000). 2. F.J. Llanes-Estrada and S.R. Cotanch, Phys. Lett. B 504, 15 (2001). 3. F.J. Llanes-Estrada and S.R. Cotanch, Nucl. Phys. A 697, 303 (2002). 4. F.J. Llanes-Estrada, S.R. Cotanch, P. Bicudo, J.E. Ribeiro and A.P. Szczepaniak, Nucl. Phys. A 710, 45 (2002). 5. F.J. Llanes-Estrada, P. Bicudo and S.R. Cotanch, Phys. Rev. Lett. 96, 081601 (2006). 6. S.R. Cotanch, I.J. General and P. Wang, Eur. Phys. J. A 31, 656 (2007). 7. I.J. General, S.R. Cotanch and F.J. Llanes-Estrada, Eur. Phys. J. C 51, 347 (2007). 8. I.J. General, P. Wang, S.R. Cotanch and F.J. Llanes Estrada, Phys. Lett. B 653, 216 (2007). 9. W.-M. Yao et al., J. Phys. G 33, 1 (2006). 10. P. Bicudo, S.R. Cotanch, F.J. Llanes-Estrada and D.G. Robertson, Eur. Phys. J. C 52, 363 (2007). 11. S.R. Cotanch and P. Maris, Phys. Rev. D 66, 116010 (2002); Phys. Rev. D 68, 036006 (2003).978-0-7354-0554-710.1063/1.2973493https://hdl.handle.net/20.500.14352/53321© 2008 American Institute of Physics. The authors wish to commend the organizers of Scadron70 for a very productive workshop. Steve Cotanch also thanks George Rupp and Pedro Bicudo for their kind assistance and hospitality, and the Fundação para a Ciência e a Tecnologia of the Ministério da Ciência, Tecnologia e Ensino Superior of Portugal for partial financial support, under contract POCI/FP/81913/2007. Work further supported by grants DOE DE FG02- 03ER41260, BSCH-PR34/07-15875, FPA 2004 02602, FPA 2005-02327 and Acción Integrada Hispano-Portuguesa HP2006 0018. Workshop on Scalar Mesons and Related Topics (2008. Lisbon, Portugal)The Coulomb gauge model, involving an effective QCD Hamiltonian in the Coulomb gauge, is applied to scalar hadrons. Mass predictions are presented for both conventional q ¯ q meson and q ¯ qq ¯ q tetra-quark states. Mixing matrix elements between these states were also computed and diagonalized to provide a reasonable description of the scalar spectrum below 2 GeV.engbook parthttp://dx.doi.org/10.1063/1.2973493http://arxiv.org/abs/0804.3837http://scitation.aip.orgopen access53MesonsFísica (Física)22 Física