Exploring hyperons and hypernuclei with lattice QCD

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In this work we outline a program for lattice QCD that wouldprovide a first step toward understanding the strong and weakinteractions of strange baryons. The study of hypernuclear physics hasprovided a significant amount of information regarding the structure andweak decays of light nuclei containing one or two Lambda's, and Sigma's.From a theoretical standpoint, little is known about the hyperon-nucleoninteraction, which is required input for systematic calculations ofhypernuclear structure. Furthermore, the long-standing discrepancies inthe P-wave amplitudes for nonleptonic hyperon decays remain to beunderstood, and their resolution is central to a better understanding ofthe weak decays of hypernuclei. We present a framework ... continued below

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Beane, S.R.; Bedaque, P.F.; Parreno, A. & Savage, M.J. January 1, 2003.

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In this work we outline a program for lattice QCD that wouldprovide a first step toward understanding the strong and weakinteractions of strange baryons. The study of hypernuclear physics hasprovided a significant amount of information regarding the structure andweak decays of light nuclei containing one or two Lambda's, and Sigma's.From a theoretical standpoint, little is known about the hyperon-nucleoninteraction, which is required input for systematic calculations ofhypernuclear structure. Furthermore, the long-standing discrepancies inthe P-wave amplitudes for nonleptonic hyperon decays remain to beunderstood, and their resolution is central to a better understanding ofthe weak decays of hypernuclei. We present a framework that utilizesLuscher's finite-volume techniques in lattice QCD to extract thescattering length and effective range for Lambda-N scattering in both QCDand partially-quenched QCD. The effective theory describing thenonleptonic decays of hyperons using isospin symmetry alone, appropriatefor lattice calculations, is constructed.

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  • Journal Name: Nuclear Physics; Journal Volume: A747; Related Information: Journal Publication Date: 2005

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  • Report No.: LBNL--53972
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 909506
  • Archival Resource Key: ark:/67531/metadc890624

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  • January 1, 2003

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 29, 2016, 2:43 p.m.

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Beane, S.R.; Bedaque, P.F.; Parreno, A. & Savage, M.J. Exploring hyperons and hypernuclei with lattice QCD, article, January 1, 2003; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc890624/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.