New ideas for g-2 on the lattice

Michele Della Morte; Andreas Juttner

New ideas for g-2 on the lattice

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

Abstrakt

Using iso-spin symmetry the quark-connected and disconnected contributions to the hadronic vacuum polarisation in a theory with N_f=2 flavours can be described as independent correlation functions, respectively. We show how this allows to use twisted boundary conditions for the connected contribution in order to improve the q^2-resolution in lattice QCD. Furthermore we derive an exact relation between the connected and the disconnected contributions at NLO in chiral perturbation theory. We discuss extensions to theories with more than 2 dynamical flavours.

Originalsprog	Udefineret/Ukendt
Tidsskrift	PoS LAT
Status	Udgivet - 20. okt. 2009

Bibliografisk note

7 pages, 1 figure, 1 table, Talk presented at The XXVII International Symposium on Lattice Field Theory, LATTICE 2009 - Peking University, Beijing, China / July 26 - 31, 2009

Emneord

hep-lat

Citationsformater

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AB - Using iso-spin symmetry the quark-connected and disconnected contributions to the hadronic vacuum polarisation in a theory with N_f=2 flavours can be described as independent correlation functions, respectively. We show how this allows to use twisted boundary conditions for the connected contribution in order to improve the q^2-resolution in lattice QCD. Furthermore we derive an exact relation between the connected and the disconnected contributions at NLO in chiral perturbation theory. We discuss extensions to theories with more than 2 dynamical flavours.

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