Journal
PHYSICS LETTERS B
Volume 714, Issue 2-5, Pages 312-316Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2012.07.004
Keywords
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Funding
- DFG [SFB/TR 55]
- EU [283286, 238353]
- Australian Research Council [FT100100005]
- Australian Research Council [FT100100005] Funding Source: Australian Research Council
- Science and Technology Facilities Council [ST/J000493/1] Funding Source: researchfish
- STFC [ST/J000493/1] Funding Source: UKRI
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By introducing an additional operator into the action and using the Feynman-Hellmann theorem we describe a method to determine both the quark line connected and disconnected terms of matrix elements. As an illustration of the method we calculate the gluon contribution (chromo-electric and chromo-magnetic components) to the nucleon mass. (C) 2012 Elsevier B.V. All rights reserved.
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