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Quark disconnected diagrams in chiral perturbation theory
| Content Provider | Semantic Scholar |
|---|---|
| Author | Morte, Michele Della Jüttner, Andreas |
| Copyright Year | 2010 |
| Abstract | We show how quark-disconnected and quark-connected contributions to hadronic n-point functions can be written as independent correlators for which one can derive expressions in partially quenched chiral effective theory. As an example we apply the idea to the case of the hadronic vacuum polarisation. In particular, we consider the cases of the Nf = 2 theory without and with a partially quenched strange quark and also the Nf = 2+1 theory. In the latter two cases a parameter-free prediction for the disconnected contribution at NLO in the effective theory is given. Finally we show how twisted boundary conditions can then be used in lattice QCD to improve the q2 resolution in the connected contributions even when flavour singlet operators are considered. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://cds.cern.ch/record/1293378/files/JHEP11.154.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Chirality (chemistry) Diagram Flavoring Lattice QCD Like button Perturbation theory Population Parameter Quenched approximation Singlet state Twisted |
| Content Type | Text |
| Resource Type | Article |
