The calculation of nucleon strangeness form factors from Nf = 2+1 clover fermion lattice QCD

T. Doi; M. Deka; S. J. Dong; T. Draper; K. F. Liu; D. Mankame; N. Mathur; T. Streuer

The calculation of nucleon strangeness form factors from Nf = 2+1 clover fermion lattice QCD

T. Doi, M. Deka, S. J. Dong, T. Draper, K. F. Liu, D. Mankame, N. Mathur, T. Streuer

Research output: Contribution to journal › Conference article › peer-review

Abstract

We study the strangeness electromagnetic form factors of the nucleon from the Nf = 2 + 1 clover fermion lattice QCD calculation. The disconnected insertions are evaluated using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. In addition to increasing the number of Z(4) noises, we find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain Gs M(0) = 0.017(25)(07), where the first error is statistical, and the second is the uncertainties in Q2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error. We also study the strangeness second moment of the partion distribution function of the nucleon, hx2is s.

Original language	English
Journal	Proceedings of Science
Volume	91
State	Published - 2009
Event	27th International Symposium on Lattice Field Theory, LAT 2009 - Beijing, China Duration: Jul 26 2009 → Jul 31 2009

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© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

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title = "The calculation of nucleon strangeness form factors from Nf = 2+1 clover fermion lattice QCD",

abstract = "We study the strangeness electromagnetic form factors of the nucleon from the Nf = 2 + 1 clover fermion lattice QCD calculation. The disconnected insertions are evaluated using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. In addition to increasing the number of Z(4) noises, we find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain Gs M(0) = 0.017(25)(07), where the first error is statistical, and the second is the uncertainties in Q2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error. We also study the strangeness second moment of the partion distribution function of the nucleon, hx2is s.",

author = "T. Doi and M. Deka and Dong, {S. J.} and T. Draper and Liu, {K. F.} and D. Mankame and N. Mathur and T. Streuer",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 27th International Symposium on Lattice Field Theory, LAT 2009 ; Conference date: 26-07-2009 Through 31-07-2009",

year = "2009",

language = "English",

volume = "91",

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TY - JOUR

T1 - The calculation of nucleon strangeness form factors from Nf = 2+1 clover fermion lattice QCD

AU - Doi, T.

AU - Deka, M.

AU - Dong, S. J.

AU - Draper, T.

AU - Liu, K. F.

AU - Mankame, D.

AU - Mathur, N.

AU - Streuer, T.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2009

Y1 - 2009

N2 - We study the strangeness electromagnetic form factors of the nucleon from the Nf = 2 + 1 clover fermion lattice QCD calculation. The disconnected insertions are evaluated using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. In addition to increasing the number of Z(4) noises, we find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain Gs M(0) = 0.017(25)(07), where the first error is statistical, and the second is the uncertainties in Q2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error. We also study the strangeness second moment of the partion distribution function of the nucleon, hx2is s.

AB - We study the strangeness electromagnetic form factors of the nucleon from the Nf = 2 + 1 clover fermion lattice QCD calculation. The disconnected insertions are evaluated using the Z(4) stochastic method, along with unbiased subtractions from the hopping parameter expansion. In addition to increasing the number of Z(4) noises, we find that increasing the number of nucleon sources for each configuration improves the signal significantly. We obtain Gs M(0) = 0.017(25)(07), where the first error is statistical, and the second is the uncertainties in Q2 and chiral extrapolations. This is consistent with experimental values, and has an order of magnitude smaller error. We also study the strangeness second moment of the partion distribution function of the nucleon, hx2is s.

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UR - http://www.scopus.com/inward/citedby.url?scp=85055260702&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85055260702

VL - 91

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 27th International Symposium on Lattice Field Theory, LAT 2009

Y2 - 26 July 2009 through 31 July 2009

ER -

The calculation of nucleon strangeness form factors from Nf = 2+1 clover fermion lattice QCD

Abstract

Bibliographical note

ASJC Scopus subject areas

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