Mass and residue of $\Lambda (1405)$ Λ ( 1405 ) as hybrid and excited ordinary baryon
| Autor: | Kazem Azizi, Hayriye Sundu, B. Barsbay |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Fluid Flow and Transfer Processes
Physics QCD sum rules Particle physics Meson 010308 nuclear & particles physics Nuclear Theory High Energy Physics::Phenomenology Hadron General Physics and Astronomy Lambda Quantum number 01 natural sciences Gluon Baryon Excited state 0103 physical sciences High Energy Physics::Experiment Nuclear Experiment 010306 general physics |
| Zdroj: | The European Physical Journal Plus. 133 |
| ISSN: | 2190-5444 |
| Popis: | The nature of the $\Lambda (1405)$ has been a puzzle for decades, whether it is a standard three-quark baryon, a hybrid baryon or a baryon-meson molecule. More information on the decay channels of this particle and its strong, weak and electromagnetic interactions with other hadrons is needed to clarify its internal organization. The residue of this particle is one of the main inputs in investigation of its decay properties in many approaches. We calculate the mass and residue of the $\Lambda (1405)$ state in the context of QCD sum rules considering it as a hybrid baryon with three-quark-one-gluon content as well as an excited ordinary baryon with quantum numbers $I(J^{P})=0(1/2^{-})$ . The comparison of the obtained results on the mass with the average experimental value presented in PDG allows us to interpret this state as a hybrid baryon. |
| Databáze: | OpenAIRE |
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