Electromagnetic form factors of the Ω- in lattice QCD
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 d...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2011
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| Online Access: | http://hdl.handle.net/1721.1/60886 https://orcid.org/0000-0002-5713-0039 |
| _version_ | 1826217373204480000 |
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| author | Negele, John W. Alexandrou, Constantia Korzec, Tomasz Koutsou, Giannis Proestos, Y. |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Negele, John W. Alexandrou, Constantia Korzec, Tomasz Koutsou, Giannis Proestos, Y. |
| author_sort | Negele, John W. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T17:02:38Z |
| format | Article |
| id | mit-1721.1/60886 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T17:02:38Z |
| publishDate | 2011 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/608862022-09-29T23:16:22Z Electromagnetic form factors of the Ω- in lattice QCD Electromagnetic form factors of the Ω- [omega baryon] in lattice QCD Negele, John W. Alexandrou, Constantia Korzec, Tomasz Koutsou, Giannis Proestos, Y. Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Negele, John W. Negele, John W. 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. Cyprus Research Promotion Foundation (RPF) (Contract no. ΠENEK/ENIΣX/0505-39) (Contract no. EPYAN/0506/08) United States. Dept. of Energy. (Grant no. DE-FG02-94ER-40818) 2011-02-03T19:47:13Z 2011-02-03T19:47:13Z 2010-08 2010-06 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/60886 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 https://orcid.org/0000-0002-5713-0039 en_US http://dx.doi.org/10.1103/PhysRevD.82.034504 Physical review D 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. application/pdf American Physical Society APS |
| spellingShingle | Negele, John W. Alexandrou, Constantia Korzec, Tomasz Koutsou, Giannis Proestos, Y. Electromagnetic form factors of the Ω- in lattice QCD |
| title | Electromagnetic form factors of the Ω- in lattice QCD |
| title_full | Electromagnetic form factors of the Ω- in lattice QCD |
| title_fullStr | Electromagnetic form factors of the Ω- in lattice QCD |
| title_full_unstemmed | Electromagnetic form factors of the Ω- in lattice QCD |
| title_short | Electromagnetic form factors of the Ω- in lattice QCD |
| title_sort | electromagnetic form factors of the ω in lattice qcd |
| url | http://hdl.handle.net/1721.1/60886 https://orcid.org/0000-0002-5713-0039 |
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