Excited state contamination in nucleon structure calculations

Jeremy Green; John Negele; Andrew Pochinsky; Stefan Krieg; Sergey Syritsyn

Excited state contamination in nucleon structure calculations

Jeremy Green
, John Negele
, Andrew Pochinsky
, Stefan Krieg
, Sergey Syritsyn

Physics and Astronomy

Massachusetts Institute of Technology
University of Wuppertal

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

2 Scopus citations

Abstract

Among the sources of systematic error in nucleon structure calculations is contamination from unwanted excited states. In order to measure this systematic error, we vary the operator insertion time and source-sink separation independently. We compute observables for three source-sink separations between 0.93 fm and 1.39 fm using clover-improved Wilson fermions and pion masses as low as 150 MeV. We explore the use of a two-state model fit to subtract off the contribution from excited states.

Original language	English
Journal	Proceedings of Science
Volume	139
State	Published - 2011
Event	29th International Symposium on Lattice Field Theory, Lattice 2011 - Squaw Valley, Lake Tahoe, United States Duration: Jul 10 2011 → Jul 16 2011

Cite this

@article{e32c49d7c8244b489436bdf156818192,

title = "Excited state contamination in nucleon structure calculations",

abstract = "Among the sources of systematic error in nucleon structure calculations is contamination from unwanted excited states. In order to measure this systematic error, we vary the operator insertion time and source-sink separation independently. We compute observables for three source-sink separations between 0.93 fm and 1.39 fm using clover-improved Wilson fermions and pion masses as low as 150 MeV. We explore the use of a two-state model fit to subtract off the contribution from excited states.",

author = "Jeremy Green and John Negele and Andrew Pochinsky and Stefan Krieg and Sergey Syritsyn",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s).; 29th International Symposium on Lattice Field Theory, Lattice 2011 ; Conference date: 10-07-2011 Through 16-07-2011",

year = "2011",

language = "English",

volume = "139",

journal = "Proceedings of Science",

issn = "1824-8039",

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TY - JOUR

T1 - Excited state contamination in nucleon structure calculations

AU - Green, Jeremy

AU - Negele, John

AU - Pochinsky, Andrew

AU - Krieg, Stefan

AU - Syritsyn, Sergey

PY - 2011

Y1 - 2011

N2 - Among the sources of systematic error in nucleon structure calculations is contamination from unwanted excited states. In order to measure this systematic error, we vary the operator insertion time and source-sink separation independently. We compute observables for three source-sink separations between 0.93 fm and 1.39 fm using clover-improved Wilson fermions and pion masses as low as 150 MeV. We explore the use of a two-state model fit to subtract off the contribution from excited states.

AB - Among the sources of systematic error in nucleon structure calculations is contamination from unwanted excited states. In order to measure this systematic error, we vary the operator insertion time and source-sink separation independently. We compute observables for three source-sink separations between 0.93 fm and 1.39 fm using clover-improved Wilson fermions and pion masses as low as 150 MeV. We explore the use of a two-state model fit to subtract off the contribution from excited states.

UR - https://www.scopus.com/pages/publications/84995331898

M3 - Conference article

AN - SCOPUS:84995331898

SN - 1824-8039

VL - 139

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 29th International Symposium on Lattice Field Theory, Lattice 2011

Y2 - 10 July 2011 through 16 July 2011

ER -

Excited state contamination in nucleon structure calculations

Abstract

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