| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000344269 |
| ISSN: | 0103-9733 |
| Authors: | Domínguez, Cesáreo A1 Loewe, Marcelo2 Rojas, Juan Cristóbal3 |
| Institutions: | 1University of Cape Town, Centre for Theoretical Physics and Astrophysics, Rondebosch. Sudáfrica 2Pontificia Universidad Católica de Chile, Facultad de Física, Santiago de Chile. Chile 3Universidad Católica del Norte, Departamento de Física, Antofagasta. Chile |
| Year: | 2008 |
| Season: | Sep |
| Volumen: | 38 |
| Number: | 3B |
| Pages: | 437-442 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Conferencia o discurso |
| Approach: | Analítico, descriptivo |
| English abstract | The thermal behaviour of the mass, leptonic decay constant, and width of heavy-light quark peseudoscalar and vector mesons is analized in the framework of thermal Hilbert moment QCD sum rules. In all the cases, the meson leptonic decay constants decrease with increasing T, and vanish at a critical temperature Tc, while the mesons develop a width which increases dramatically, diverging when T !Tc, where Tc is the temperature for chiral-symmetry restoration. The spectral function becomes a smooth function of the energy. This is interpreted as a signal for deconfinement at T = Tc. In contrast, the thermal masses are stable, except when T !Tc, where the pseudoscalar meson mass increases slightly by 10-20 %, and the vector meson mass decreases by some 20-30 % |
| Disciplines: | Física y astronomía |
| Keyword: | Física de partículas y campos cuánticos, Mesones vectoriales, Constante de caída leptónica, Cromodinámica cuántica, Cuarks |
| Keyword: | Physics and astronomy, Particle physics and quantum fields, Vector mesons, Lepton decay constant, Quantum chromodynamics (QCD), Quarks |
| Full text: | Texto completo (Ver PDF) |
