TY - JOUR

T1 - Sea contributions to hadron electric polarizabilities through reweighting

AU - Freeman, Walter

AU - Alexandru, Andrei

AU - Lee, Frank X.

AU - Lujan, Michael

N1 - Funding Information:
This work is supported in part by the NSF CAREER grant PHY-1151648 and the U.S. Department of Energy grant DE-FG02-95ER-40907.

PY - 2013

Y1 - 2013

N2 - 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.

AB - 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.

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M3 - Conference article

AN - SCOPUS:84976312054

VL - 29-July-2013

JO - Proceedings of Science

JF - Proceedings of Science

SN - 1824-8039

M1 - 288

T2 - 31st International Symposium on Lattice Field Theory, LATTICE 2013

Y2 - 29 July 2013 through 3 August 2013

ER -