Excited state Effects in Nucleon Matrix Element Calculations
Date
2012-07-05Author
Dinter, S
Alexandrou, C
Constantinou, M
Drach, V
Jansen, K
Leontiou, T
Renner, DB
Subject
hep-lat hep-lat
Metadata
Show full item recordAbstract
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 gA and for the first moment of the isovector unpolarized parton distribution hxiu−d. In addition, we report on preliminary results using the generalized eigenvalue method for nucleon matrix elements. All calculations are performed using Nf = 2 + 1 + 1 maximally twisted mass Wilson fermions.
Description
7 pages, 4 figures. Talk given at the XXIX International Symposium on
Lattice Field Theory - Lattice 2011, Lake Tahoe, California, USA
Collections
Publisher
Sissa Medialab
Journal
Proceedings of XXIX International Symposium on Lattice Field Theory — PoS(Lattice 2011)
Volume
139
Pagination
150-
Conference name
XXIX International Symposium on Lattice Field Theory
Start date
2011-07-10
Author URL
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