Sea contributions to hadron electric polarizabilities through reweighting

Walter Freeman, Andrei Alexandru, Frank X. Lee, Michael Lujan

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations

Abstract

As part of our ongoing lattice study of the electric polarizabilities of hadrons using the background field approach, we use reweighting to examine the effect of the field on the sea quarks. As with other reweighting studies, the chief difficulty lies in the construction of a stochastic estimate of the ratio of the fermion determinants. In contrast to the case of reweighting in the quark mass, these estimators converge extremely slowly, and are resistant to common variance-reduction techniques such as low-mode subtraction. However, it is possible to construct an alternate estimator, taking advantage of the fact that we are interested in only perturbatively small fields; this estimator is susceptible to a variance-reduction technique based on a hopping parameter expansion.

Original languageEnglish (US)
Article number015
JournalProceedings of Science
VolumePart F130497
DOIs
StatePublished - 2012
Externally publishedYes
Event30th International Symposium on Lattice Field Theory, Lattice 2012 - Cairns, Australia
Duration: Jun 24 2012Jun 29 2012

ASJC Scopus subject areas

  • General

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