| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403419 |
| ISSN: | 0103-9733 |
| Authors: | Matheus, R.D1 |
| Institutions: | 1Universidade de Sao Paulo, Instituto de Fisica, Sao Paulo. Brasil |
| Year: | 2007 |
| Season: | Mar |
| Volumen: | 37 |
| Number: | 1 |
| Pages: | 63-66 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | QCD spectral sum rules is used to test the nature of the meson X(3872), assumed to be an exotic fourquark (ccq¯ q¯) state with J PC = 1 ++. For definiteness, the current proposed recently by Maiani et al [1] is used, at leading order in αs, considering the contributions of higher dimension condensates. The value MX = (3.94 ± 0.11) GeV is found which is compatible, within the errors, with the experimental candidate X(3872). The uncertainties of our estimates are mainly due to the one from the c quark mass |
| Disciplines: | Física y astronomía |
| Keyword: | Física de partículas y campos cuánticos, Teoría cuántica de campos, Cromodinámica cuántica, Tetraquarks |
| Keyword: | Physics and astronomy, Particle physics and quantum fields, Quantum field theory, Quantum chromodynamics (QCD), Tetraquarks |
| Full text: | Texto completo (Ver PDF) |
