QCD determination of the pion nucleon σ term and the strangeness content of the proton
| Autor: | Shukla Basu, Subhra Niyogi |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Quantum chromodynamics
Physics Quark Nuclear and High Energy Physics Particle physics Meson High Energy Physics::Lattice High Energy Physics::Phenomenology Nuclear Theory Strangeness Atomic and Molecular Physics and Optics Nuclear physics Pion High Energy Physics::Experiment Sum rule in quantum mechanics Nuclear Experiment Chiral symmetry breaking Nucleon |
| Zdroj: | Nuclear Physics B - Proceedings Supplements. 23:115-118 |
| ISSN: | 0920-5632 |
| DOI: | 10.1016/0920-5632(91)90674-4 |
| Popis: | A strong violation of the Quark Line Rule is observed if we allow the pion nucleon σ term to attain the present experimental value. This in turn indicates the possibility of a large strangeness content in the proton. In this work we have shown that the value of the σ term is seen to be raised from what is expected from the GMOR scheme of chiral symmetry breaking through a sum rule which shows that the ratio of the meson wave function renormalization constants ZK12/Zπ12 may deviate considerably from unity by using the recent QCD estimate on the quark vacuum condensate ratio O/ O |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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