Excited Baryons from the FLIC Fermion Action

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Masses of positive and negative parity excited nucleons and hyperons are calculated in quenched lattice QCD using an order (a{sup 2}) improved gluon action and a fat-link clover fermion action in which only the irrelevant operators are constructed with fat links. The results are in agreement with earlier N* simulations with improved actions, and exhibit a clear mass splitting between the nucleon and its parity partner, as well as a small mass splitting between the low-lying J{sup P}=1/2{sup -}N* states. Study of different Lambda interpolating fields suggests a similar splitting between the lowest two 1/2{sup -}Lambda* states, although the empirical ... continued below

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170 Kilobytes pages

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Melnitchouk, Wally; Hedditch, J.N.; Leinweber, D.B.; Williams, A.G.; Zanoti, J. & Zhang, J.B. June 1, 2002.

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Masses of positive and negative parity excited nucleons and hyperons are calculated in quenched lattice QCD using an order (a{sup 2}) improved gluon action and a fat-link clover fermion action in which only the irrelevant operators are constructed with fat links. The results are in agreement with earlier N* simulations with improved actions, and exhibit a clear mass splitting between the nucleon and its parity partner, as well as a small mass splitting between the low-lying J{sup P}=1/2{sup -}N* states. Study of different Lambda interpolating fields suggests a similar splitting between the lowest two 1/2{sup -}Lambda* states, although the empirical mass suppression of the Lambda*(1405) is not seen.

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170 Kilobytes pages

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  • Lattice 2002, Cambridge, MA (US), 06/24/2000--06/29/2000

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  • Report No.: JLAB-THY-02-45
  • Report No.: DOE-ER/40150-2199
  • Grant Number: AC05-84ER40150
  • Office of Scientific & Technical Information Report Number: 801522
  • Archival Resource Key: ark:/67531/metadc734741

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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, 9:28 p.m.

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Melnitchouk, Wally; Hedditch, J.N.; Leinweber, D.B.; Williams, A.G.; Zanoti, J. & Zhang, J.B. Excited Baryons from the FLIC Fermion Action, article, June 1, 2002; Newport News, Virginia. (digital.library.unt.edu/ark:/67531/metadc734741/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.