Electromagnetic form factors of the Ω- in lattice QCD
Name
Alexandrou-2010-Electromagnetic form.pdf
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1.02 MB
Format
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Author(s)
Negele, John W.
Alexandrou, Constantia
Korzec, Tomasz
Koutsou, Giannis
Proestos, Y.
Alternative Title
Electromagnetic form factors of the Ω- [omega baryon] in lattice QCD
Date Issued
August 2010
Journal
Physical review D
Publisher
American Physical Society
Citation
Alexandrou, C. et al. “Electromagnetic form factors of the Ω^{-} in lattice QCD.” Physical Review D 82.3 (2010): n. pag. © 2010 The American Physical Society
Version
Final published version
Abstract
We present results on the omega baryon (Ω-) electromagnetic form factors using Nf=2+1 domain-wall fermion configurations for three pion masses in the range of about 350 to 300 MeV. We compare results obtained using domain-wall fermions with those of a mixed-action (hybrid) approach, which combines domain-wall valence quarks on staggered sea quarks, for a pion mass of about 350 MeV. We pay particular attention in the evaluation of the subdominant electric quadrupole form factor to sufficient accuracy to exclude a zero value, by constructing a sequential source that isolates it from the dominant form factors. The Ω-[omega baryon] magnetic moment, μΩ- [mu omega baryon], and the electric charge and magnetic radius,(r[superscript 2 subscript E0/M1),are extracted for these pion masses. The electric quadrupole moment is determined for the first time using dynamical quarks.
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
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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
https://doi.org/10.1103/PhysRevD.82.034504
