Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/76501
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DC Field | Value | Language |
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dc.contributor.author | Yamazaki, T. | - |
dc.contributor.author | Aoki, Y. | - |
dc.contributor.author | Blum, T. | - |
dc.contributor.author | Lin, H. | - |
dc.contributor.author | Ohta, S. | - |
dc.contributor.author | Sasaki, S. | - |
dc.contributor.author | Tweedie, R. | - |
dc.contributor.author | Zanotti, J. | - |
dc.date.issued | 2009 | - |
dc.identifier.citation | Physical Review D: Particles, Fields, Gravitation and Cosmology, 2009; 79(11):114505:1-114505:20 | - |
dc.identifier.issn | 1550-7998 | - |
dc.identifier.issn | 1550-2368 | - |
dc.identifier.uri | http://hdl.handle.net/2440/76501 | - |
dc.description.abstract | We report our numerical lattice QCD calculations of the isovector nucleon form factors for the vector and axial-vector currents: the vector, induced tensor, axial-vector, and induced pseudoscalar form factors. The calculation is carried out with the gauge configurations generated with Nf=2+1 dynamical domain-wall fermions and Iwasaki gauge actions at β=2.13, corresponding to a cutoff a-1=1.73GeV, and a spatial volume of (2.7fm)3. The up and down-quark masses are varied so the pion mass lies between 0.33 and 0.67 GeV while the strange quark mass is about 12% heavier than the physical one. We calculate the form factors in the range of momentum transfers, 0.2<q2<0.75GeV2. The vector and induced tensor form factors are well described by the conventional dipole forms and result in significant underestimation of the Dirac and Pauli mean-squared radii and the anomalous magnetic moment compared to the respective experimental values. We show that the axial-vector form factor is significantly affected by the finite spatial volume of the lattice. In particular in the axial charge, gA/gV, the finite-volume effect scales with a single dimensionless quantity, mπL, the product of the calculated pion mass and the spatial lattice extent. Our results indicate that for this quantity, mπL>6 is required to ensure that finite-volume effects are below 1%. © 2009 The American Physical Society. | - |
dc.description.statementofresponsibility | Takeshi Yamazaki, Yasumichi Aoki, Tom Blum, Huey-Wen Lin, Shigemi Ohta, Shoichi Sasaki, Robert Tweedie and James Zanotti (RBC and UKQCD Collaborations) | - |
dc.language.iso | en | - |
dc.publisher | American Physical Soc | - |
dc.rights | © 2009 The American Physical Society | - |
dc.source.uri | http://dx.doi.org/10.1103/physrevd.79.114505 | - |
dc.title | Nucleon form factors with 2+1 flavor dynamical domain-wall fermions | - |
dc.type | Journal article | - |
dc.identifier.doi | 10.1103/PhysRevD.79.114505 | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | Zanotti, J. [0000-0002-3936-1597] | - |
Appears in Collections: | Aurora harvest 4 Chemistry and Physics publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_76501.pdf | Published version | 1.26 MB | Adobe PDF | View/Open |
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