Journal Article

FZJ-2015-03407

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electromagnetic form factors of the Ω − in lattice QCD

Alexandrou, C. (Corresponding Author) ; Korzec, T. ; Koutsou, G.FZJ* ; Negele, J. W. ; Proestos, Y.

2010
Soc. [S.l.]

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Please use a persistent id in citations: http://hdl.handle.net/2128/8734  doi:10.1103/PhysRevD.82.034504

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− magnetic moment, μΩ−, and the electric charge and magnetic radius, ⟨r2E0/M1⟩, are extracted for these pion masses. The electric quadrupole moment is determined for the first time using dynamical quarks.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)

Research Program(s):

1. 411 - Computational Science and Mathematical Methods (POF2-411) (POF2-411)

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Database coverage:
; ; ; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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