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delta-baryon electromagnetic form factors in lattice QCD

Author(s)
Alexandrou, Constantia; Korzec, Tomasz; Koutsou, Giannis; Lorce, C.; Negele, John W.; Pascalutsa, V.; Tsapalis, A.; Vanderhaeghen, M.; ... Show more Show less
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Alternative title
Δ-baryon electromagnetic form factors in lattice QCD
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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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.
Date issued
2009-01
URI
http://hdl.handle.net/1721.1/52708
Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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
ISSN
1550-2368
1550-7998

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