Excited hadrons from improved interpolating fields

The calculation of quark propagators for Ginsparg-Wilson-type Dirac operators is costly and thus limited to a few different sources. We present a new approach for determining spatially optimized operators for lattice spectroscopy of excited hadrons. Jacobi smeared quark sources with different widths...

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Bibliographic Details
Published in:arXiv.org 2004-09
Main Authors: Burch, Tommy, Gattringer, Christof, Leonid Ya Glozman, Kleindl, Reinhard, Lang, C B, Schäfer, Andreas
Format: Article
Language:English
Subjects:
Excitation spectra
Hadrons
Mesons
Operators
Quarks
Wave functions
Online Access:Get full text
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Summary:The calculation of quark propagators for Ginsparg-Wilson-type Dirac operators is costly and thus limited to a few different sources. We present a new approach for determining spatially optimized operators for lattice spectroscopy of excited hadrons. Jacobi smeared quark sources with different widths are combined to construct hadron operators with different spatial wave functions. We study the Roper state and excited rho and pion mesons.
ISSN:2331-8422
DOI:10.48550/arxiv.0409014