delta-baryon electromagnetic form factors in lattice QCD
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Alexandrou-2009-Delta-baryon electro.pdf
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Author(s)
Alexandrou, Constantia
Korzec, Tomasz
Koutsou, Giannis
Lorce, C.
Negele, John W.
Pascalutsa, V.
Tsapalis, A.
Vanderhaeghen, M.
Alternative Title
Δ-baryon electromagnetic form factors in lattice QCD
Date Issued
January 2009
Journal
Physical Review D
Publisher
American Physical Society
Citation
Alexandrou, C. et al. "delta-baryon electromagnetic form factors in lattice QCD." Physical Review D 79.1 (2009): 014507.
Version
Final published version
Abstract
We develop techniques to calculate the four Δ electromagnetic form factors using lattice QCD, with particular emphasis on the subdominant electric quadrupole form factor that probes deformation of the Δ. Results are presented for pion masses down to approximately 350 MeV for three cases: quenched QCD, two flavors of dynamical Wilson quarks, and three flavors of quarks described by a mixed action combining domain-wall valence quarks and dynamical staggered sea quarks. The magnetic moment of the Δ is compared with chiral effective field theory calculations and the Δ charge density distributions are discussed.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevD.79.014507
