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

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

M. Lujan
(
- Jaycor, McLean
)
,
A. Alexandru
(
- George Washington U. and
- Maryland U., College Park
)
,
W. Freeman
(
- Syracuse U.
)
,
F.X. Lee
(
- George Washington U.
)

Jun 25, 2016

10 pages

Published in:

Phys.Rev.D 94 (2016) 7, 074506

Published: Oct 25, 2016

e-Print:

1606.07928 [hep-lat]

DOI:

10.1103/PhysRevD.94.074506

View in:

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Abstract: (APS)

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)×10-4 fm3. 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.

Note:

9 pages, 6 figures, 6 tables. Version to appear in Phys. Rev. D

12.38.Gc
finite size: effect
polarizability: electric
pi: polarizability
K: polarizability
n: polarizability
correction: finite size
quantum chromodynamics: lattice
numerical calculations
quark: Wilson

References(23)

Figures(12)

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