Sea contributions to hadron electric polarizabilities through reweighting

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

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We present the results of a reweighting calculation to compute the contribution of the charged quark sea to the neutron electric polarizability. The chief difficulty is the stochastic estimation of weight factors, and we present a hopping parameter expansion-based technique for reducing the stochastic noise, along with a discussion of why this particular reweighting is so difficult. We used this technique to estimate weight factors for 300 configurations of nHYP-clover fermions and compute the neutron polarizability, but the reweighting greatly inflates the overall statistical error, driven by the stochastic noise in the weight factors.

Original languageEnglish (US)
Article number288
JournalUnknown Journal
StatePublished - 2013
Externally publishedYes

ASJC Scopus subject areas

  • General

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