Spin-3/2 baryons in lattice QCD

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We present first results for masses of spin-3/2 baryons in lattice QCD, using a novel fat-link clover fermion action in which only the irrelevant operators are constructed using fat links. In the isospin-1/2 sector, we observe, after appropriate spin and parity projection, a strong signal for the J{sup P} = 3/2{sup -} state, and find good agreement between the 1/2{sup +} mass and earlier nucleon mass simulations with a spin-1/2 interpolating field. For the isospin-3/2 Delta states, clear mass splittings are observed between the various 1/2{sup +/-} and the 3/2{sup +/-} channels, with the calculated level orderings in good agreement ... continued below

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178 Kilobytes pages

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Zanotti, J.M.; Choe, S.; Leinweber, D.B.; Melnitchouk, W.; Williams, A.G. & Zhang, J.B. June 1, 2002.

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We present first results for masses of spin-3/2 baryons in lattice QCD, using a novel fat-link clover fermion action in which only the irrelevant operators are constructed using fat links. In the isospin-1/2 sector, we observe, after appropriate spin and parity projection, a strong signal for the J{sup P} = 3/2{sup -} state, and find good agreement between the 1/2{sup +} mass and earlier nucleon mass simulations with a spin-1/2 interpolating field. For the isospin-3/2 Delta states, clear mass splittings are observed between the various 1/2{sup +/-} and the 3/2{sup +/-} channels, with the calculated level orderings in good agreement with those observed empirically.

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178 Kilobytes pages

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  • Lattice 2002, MIT, Cambridge, MA (US), 06/24/2002--06/29/2002

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  • Report No.: JLAB-THY-02-46
  • Report No.: DOE-ER/40150-2200
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 801523
  • Archival Resource Key: ark:/67531/metadc739246

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  • June 1, 2002

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 5, 2016, 8:31 p.m.

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Zanotti, J.M.; Choe, S.; Leinweber, D.B.; Melnitchouk, W.; Williams, A.G. & Zhang, J.B. Spin-3/2 baryons in lattice QCD, article, June 1, 2002; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc739246/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.