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Title: Exploring Hyperons and Hypernuclei with Lattice QCD

In this work we outline a program for lattice QCD that would provide a first step toward understanding the strong and weak interactions of strange baryons. The study of hypernuclear physics has provided a significant amount of information regarding the structure and weak decays of light nuclei containing one or two Lambda's, and Sigma's. From a theoretical standpoint, little is known about the hyperon-nucleon interaction, which is required input for systematic calculations of hypernuclear structure. Furthermore, the long-standing discrepancies in the P-wave amplitudes for nonleptonic hyperon decays remain to be understood, and their resolution is central to a better understanding of the weak decays of hypernuclei. We present a framework that utilizes Luscher's finite-volume techniques in lattice QCD to extract the scattering length and effective range for Lambda-N scattering in both QCD and partially-quenched QCD. The effective theory describing the nonleptonic decays of hyperons using isospin symmetry alone, appropriate for lattice calculations, is constructed.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
836836
Report Number(s):
JLAB-THY-03-229; DOE/ER/40150-3135; nucl-th/0311027
Journal ID: ISSN 0375-9474; NUPABL; TRN: US0500809
DOE Contract Number:
AC05-84ER40150
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Physics, A; Journal Volume: 747; Other Information: PBD: 1 Jan 2005
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
Sponsoring Org:
US Department of Energy; USDOE Office of Energy Research (ER) (US)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; AMPLITUDES; HYPERNUCLEI; HYPERONS; ISOSPIN; LIGHT NUCLEI; PHYSICS; QUANTUM CHROMODYNAMICS; RESOLUTION; SCATTERING; SCATTERING LENGTHS; SYMMETRY; WEAK HADRONIC DECAY; WEAK INTERACTIONS