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Maximal variance reduction for stochastic propagators with applications to the static quark spectrum

Michael, C. and Peisa, J. (1998) Maximal variance reduction for stochastic propagators with applications to the static quark spectrum. Physical Review D, 58 . Article Number: 034506. ISSN 1550-2368 (online); 1550-7998 (print)

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Official URL: http://link.aps.org/abstract/PRD/v58/e034506

Cited 59 times in WoS

Abstract

We study a new method-maximal variance reduction-for reducing the variance of stochastic estimators for quark propagators. We find that while this method is comparable to the usual iterative inversion for light-light mesons, a considerable improvement is achieved for systems containing at least one infinitely heavy quark. Such systems are needed for heavy quark effective theory. As an illustration of the effectiveness of the method we present results for the masses of the ground state and excited states of (Q) over bar q masons and (Q) over bar qq baryons. We compare these results with the experimental spectra involving b quarks. [S0556-2821(98)0017-0].

Item Type:Article
Additional Information:LTH 420. Additional citation information: PHYSICAL REVIEW D, VOLUME 58, 034506; 0556-2821/98/58(3)/034506(15). 15 pages. Published 7 July 1998. Issue: August 1998.
Uncontrolled Keywords:CONTINUUM-LIMIT; LATTICE QCD; HEAVY; APPROXIMATION; SPECTROSCOPY; MESONS; SU(3); FIELD
Subjects:Q Science > QC Physics
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Science > Department of Mathematical Sciences
DOI:10.1103/PhysRevD.58.034506
Publisher's Statement:©1998 The American Physical Society
Related URLs:
Refereed:Yes
Status:Published
ID Code:647
Deposited On:03 Nov 2008 11:12
Last Modified:20 May 2011 09:22

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