Journal
PHYSICAL REVIEW D
Volume 89, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.89.074506
Keywords
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Funding
- NSF CAREER [PHY-1151648]
- U.S. Department of Energy [DE-FG02-95ER40907]
- ARCS foundation
- Direct For Mathematical & Physical Scien
- Division Of Physics [1151648] Funding Source: National Science Foundation
- U.S. Department of Energy (DOE) [DE-FG02-95ER40907] Funding Source: U.S. Department of Energy (DOE)
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We present a valence calculation of the electric polarizability of the neutron, neutral pion, and neutral kaon on two dynamically generated nHYP-clover ensembles. The pion masses for these ensembles are 227(2) MeV and 306(1) MeV, which are the lowest ones used in polarizability studies. This is part of a program geared toward determining these parameters at the physical point. We carry out a high statistics calculation that allows us to: (i) perform an extrapolation of the kaon polarizability to the physical point; we find alpha(K) = 0.269(43) x 10(-4) fm(3), (ii) quantitatively compare our neutron polarizability results with predictions from chi PT, and (iii) analyze the dependence on both the valence and sea quark masses. The kaon polarizability varies slowly with the light quark mass and the extrapolation can be done with high confidence.
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