Flavor twisted boundary conditions and the nucleon vector current

F. J. Jiang, B. C. Tiburzi

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Using flavor twisted boundary conditions, we study nucleon matrix elements of the vector current. We twist only the active quarks that couple to the current. Finite volume corrections due to twisted boundary conditions are determined using partially twisted, partially quenched, heavy baryon chiral perturbation theory, which we develop for the graded group SU(7|5). Asymptotically these corrections are exponentially small in the volume, but can become pronounced for small twist angles. Utilizing the Breit frame does not mitigate volume corrections to nucleon vector current matrix elements. The derived expressions will allow for better controlled extractions of the isovector magnetic moment and the electromagnetic radii from simulations at zero lattice momentum. Our formalism, moreover, can be applied to any nucleon matrix elements.

Original languageEnglish
Article number114505
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume78
Issue number11
DOIs
Publication statusPublished - 2008 Dec 1

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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