Excited State Effects in Nucleon Matrix Element Calculations
Conference
·
· PoS(LATTICE2011)
OSTI ID:1043047
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-06OR23177
- OSTI ID:
- 1043047
- Report Number(s):
- JLAB-THY-12-1410; DOE/OR/23177-1945; arXiv:1112.2931; TRN: US1202997
- Journal Information:
- 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
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