Electric polarizability of neutral hadrons from dynamical lattice QCD ensembles

M. Lujan, A. Alexandru, Walter Freeman, F. X. Lee

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

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 αK=0.269(43)×10-4fm3, (ii) quantitatively compare our neutron polarizability results with predictions from χPT, 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.

Original languageEnglish (US)
Article number074506
JournalPhysical Review D
Volume89
Issue number7
DOIs
StatePublished - Apr 8 2014
Externally publishedYes

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hadrons
quantum chromodynamics
extrapolation
pions
quarks
valence
neutrons
confidence
statistics
predictions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Electric polarizability of neutral hadrons from dynamical lattice QCD ensembles. / Lujan, M.; Alexandru, A.; Freeman, Walter; Lee, F. X.

In: Physical Review D, Vol. 89, No. 7, 074506, 08.04.2014.

Research output: Contribution to journalArticle

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