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Photo of Johan Bijnens

Johan Bijnens

Professor

Photo of Johan Bijnens

Finite volume dependence of the quark-antiquark vacuum expectation value

Author

  • Johan Bijnens
  • Karim Ghorbani

Summary, in English

A general formula is derived for the finite volume dependence of vacuum expectation values analogous to Luscher's formula for the masses. The result involves no integrals over kinematic quantities and depends only on the matrix element between pions at zero momentum transfer thus presenting a new way to calculate the latter, i.e. pion sigma terms. The full order p(6) correction to the vacuum condensate <(q) over barq > is evaluated and compared with the result from the Luscher formula. Due to the size of the p(6) result no conclusion about the accuracy of the Luscher formula can be drawn.

Department/s

  • Theoretical Particle Physics

Publishing year

2006

Language

English

Pages

51-55

Publication/Series

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Volume

636

Issue

1

Document type

Journal article

Publisher

Elsevier

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0370-2693