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Title: Excited State Effects in Nucleon Matrix Element Calculations

Abstract

We perform a high-statistics precision calculation of nucleon matrix elements using an open sink method allowing us to explore a wide range of sink-source time separations. In this way the influence of excited states of nucleon matrix elements can be studied. As particular examples we present results for the nucleon axial charge g{sub A} and for the first moment of the isovector unpolarized parton distribution x{sub u-d}. In addition, we report on preliminary results using the generalized eigenvalue method for nucleon matrix elements. All calculations are performed using N{sub f} = 2+1+1 maximally twisted mass Wilson fermions.

Authors:
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1043047
Report Number(s):
JLAB-THY-12-1410; DOE/OR/23177-1945; arXiv:1112.2931
TRN: US1202997
DOE Contract Number:
AC05-06OR23177
Resource Type:
Conference
Resource Relation:
Journal Name: PoS(LATTICE2011); Conference: Lattice 2011 - The 29th International Symposium on Lattice Field Theory, July 11-16, 2011, Lake Tahoe, CA
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCURACY; DISTRIBUTION; EIGENVALUES; EXCITED STATES; FERMIONS; ISOVECTORS; LATTICE FIELD THEORY; MATRIX ELEMENTS; NUCLEONS

Citation Formats

Constantia Alexandrou, Martha Constantinou, Simon Dinter, Vincent Drach, Karl Jansen, Theodoros Leontiou, Dru B Renner. Excited State Effects in Nucleon Matrix Element Calculations. United States: N. p., 2011. Web.
Constantia Alexandrou, Martha Constantinou, Simon Dinter, Vincent Drach, Karl Jansen, Theodoros Leontiou, Dru B Renner. Excited State Effects in Nucleon Matrix Element Calculations. United States.
Constantia Alexandrou, Martha Constantinou, Simon Dinter, Vincent Drach, Karl Jansen, Theodoros Leontiou, Dru B Renner. Thu . "Excited State Effects in Nucleon Matrix Element Calculations". United States. doi:. https://www.osti.gov/servlets/purl/1043047.
@article{osti_1043047,
title = {Excited State Effects in Nucleon Matrix Element Calculations},
author = {Constantia Alexandrou, Martha Constantinou, Simon Dinter, Vincent Drach, Karl Jansen, Theodoros Leontiou, Dru B Renner},
abstractNote = {We perform a high-statistics precision calculation of nucleon matrix elements using an open sink method allowing us to explore a wide range of sink-source time separations. In this way the influence of excited states of nucleon matrix elements can be studied. As particular examples we present results for the nucleon axial charge g{sub A} and for the first moment of the isovector unpolarized parton distribution x{sub u-d}. In addition, we report on preliminary results using the generalized eigenvalue method for nucleon matrix elements. All calculations are performed using N{sub f} = 2+1+1 maximally twisted mass Wilson fermions.},
doi = {},
journal = {PoS(LATTICE2011)},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 01 00:00:00 EST 2011},
month = {Thu Dec 01 00:00:00 EST 2011}
}

Conference:
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