Finite volume effects on the electric polarizability of neutral hadrons in lattice QCD

M. Lujan, A. Alexandru, W. Freeman, and F. X. Lee
Phys. Rev. D 94, 074506 – Published 25 October 2016

Abstract

We study the finite volume effects on the electric polarizability for the neutron, neutral pion, and neutral kaon using eight dynamically generated two-flavor nHYP-clover ensembles at two different pion masses: 306(1) and 227(2) MeV. An infinite volume extrapolation is performed for each hadron at both pion masses. For the neutral kaon, finite volume effects are relatively mild. The dependence on the quark mass is also mild, and a reliable chiral extrapolation can be performed along with the infinite volume extrapolation. Our result is αK0phys=0.356(74)(46)×104fm3. In contrast, for neutron, the electric polarizability depends strongly on the volume. After removing the finite volume corrections, our neutron polarizability results are in good agreement with chiral perturbation theory. For the connected part of the neutral pion polarizability, the negative trend persists, and it is not due to finite volume effects but likely sea quark charging effects.

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  • Received 4 July 2016

DOI:https://doi.org/10.1103/PhysRevD.94.074506

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

M. Lujan1, A. Alexandru2,3, W. Freeman4, and F. X. Lee2

  • 1Math Modeling Group, LMĨ, Tysons Corner, Virginia 22102, USA
  • 2Department of Physics, The George Washington University, Washington, DC 20052, USA
  • 3Department of Physics, University of Maryland, College Park, Maryland 20742, USA
  • 4Department of Physics, Syracuse University, Syracuse, New York 13244, USA

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Issue

Vol. 94, Iss. 7 — 1 October 2016

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