Quantum Operator Design for Lattice Baryon Spectroscopy
Abstract
A previously-proposed method of constructing spatially-extended gauge-invariant three-quark operators for use in Monte Carlo lattice QCD calculations is tested, and a methodology for using these operators to extract the energies of a large number of baryon states is developed. This work is part of a long-term project undertaken by the Lattice Hadron Physics Collaboration to carry out a first-principles calculation of the low-lying spectrum of QCD. The operators are assemblages of smeared and gauge-covariantly-displaced quark fields having a definite flavor structure. The importance of using smeared fields is dramatically demonstrated. It is found that quark field smearing greatly reduces the couplings to the unwanted high-lying short-wavelength modes, while gauge field smearing drastically reduces the statistical noise in the extended operators.
- Authors:
-
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 917690
- Report Number(s):
- JLAB-THY-06-625; DOE/ER/40150-5017; hep-lat/0609019
TRN: US0805081
- DOE Contract Number:
- AC05-84ER40150
- Resource Type:
- Thesis/Dissertation
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BARYON SPECTROSCOPY; BARYONS; DESIGN; HADRONS; PHYSICS; QUANTUM CHROMODYNAMICS; QUANTUM OPERATORS; QUARKS
Citation Formats
Lichtl, Adam. Quantum Operator Design for Lattice Baryon Spectroscopy. United States: N. p., 2006.
Web. doi:10.2172/917690.
Lichtl, Adam. Quantum Operator Design for Lattice Baryon Spectroscopy. United States. https://doi.org/10.2172/917690
Lichtl, Adam. 2006.
"Quantum Operator Design for Lattice Baryon Spectroscopy". United States. https://doi.org/10.2172/917690. https://www.osti.gov/servlets/purl/917690.
@article{osti_917690,
title = {Quantum Operator Design for Lattice Baryon Spectroscopy},
author = {Lichtl, Adam},
abstractNote = {A previously-proposed method of constructing spatially-extended gauge-invariant three-quark operators for use in Monte Carlo lattice QCD calculations is tested, and a methodology for using these operators to extract the energies of a large number of baryon states is developed. This work is part of a long-term project undertaken by the Lattice Hadron Physics Collaboration to carry out a first-principles calculation of the low-lying spectrum of QCD. The operators are assemblages of smeared and gauge-covariantly-displaced quark fields having a definite flavor structure. The importance of using smeared fields is dramatically demonstrated. It is found that quark field smearing greatly reduces the couplings to the unwanted high-lying short-wavelength modes, while gauge field smearing drastically reduces the statistical noise in the extended operators.},
doi = {10.2172/917690},
url = {https://www.osti.gov/biblio/917690},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Sep 07 00:00:00 EDT 2006},
month = {Thu Sep 07 00:00:00 EDT 2006}
}