This title appears in the Scientific Report :
2013
Please use the identifier:
http://hdl.handle.net/2128/10202 in citations.
Nucleon form factors with light Wilson quarks
Nucleon form factors with light Wilson quarks
We present nucleon observables - primarily isovector vector form factors - from calculations using 2+1 flavors of Wilson quarks. One ensemble is used for a dedicated high-precision study of excited-state effects using five source-sink separations between 0.7 and 1.6 fm. We also present results from...
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Personal Name(s): | Green, Jeremy (Corresponding author) |
---|---|
Engelhardt, Michael / Krieg, Stefan / Meinel, Stefan / Negele, John / Pochinsky, Andrew / Syritsyn, Sergey | |
Contributing Institute: |
Jülich Supercomputing Center; JSC |
Published in: | Proceedings of Science, LATTICE 2013 S. 276 |
Imprint: |
Trieste
SISSA
2013
|
Physical Description: |
276 |
Conference: | 31st International Symposium on Lattice Field Theory, Mainz (Germany), 2013-07-29 - 2013-08-03 |
Document Type: |
Contribution to a conference proceedings Journal Article |
Research Program: |
Computational Science and Mathematical Methods |
Link: |
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Publikationsportal JuSER |
We present nucleon observables - primarily isovector vector form factors - from calculations using 2+1 flavors of Wilson quarks. One ensemble is used for a dedicated high-precision study of excited-state effects using five source-sink separations between 0.7 and 1.6 fm. We also present results from a larger set of calculations that include an ensemble with pion mass 149 MeV and box size 5.6 fm, which nearly eliminates the uncertainty associated with extrapolation to the physical pion mass. The results show agreement with experiment for the vector form factors, which occurs only when excited-state contributions are reduced. Finally, we show results from a subset of ensembles that have pion mass 254 MeV with varying temporal and spatial box sizes, which we use for a controlled study of finite-volume effects and a test of the '$m_\pi L=4$' rule of thumb. |