Gauge-invariant smearing and matrix correlators using Wilson fermions at <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>β</mi><mo>=</mo><mn>6.2</mn><mn></mn></math></span>

C. R. Allton; C. T. Sachrajda; R. M. Baxter; S. P. Booth; K. C. Bowler; S. Collins; D. S. Henty; R. D. Kenway; B. J. Pendleton; D. G. Richards; J. N. Simone; A. D. Simpson; B. E. Wilkes; UKQCD Collaboration; C. Michael

doi:10.1103/PhysRevD.47.5128

Gauge-invariant smearing and matrix correlators using Wilson fermions at $β = 6.2$

C. R. Allton, C. T. Sachrajda, R. M. Baxter, S. P. Booth, K. C. Bowler, S. Collins, D. S. Henty, R. D. Kenway, B. J. Pendleton, D. G. Richards, J. N. Simone, A. D. Simpson, B. E. Wilkes, and C. Michael (UKQCD Collaboration)

Phys. Rev. D 47, 5128 – Published 1 June 1993

Abstract

We present an investigation of gauge-invariant smearing for Wilson fermions in quenched lattice QCD on a $24^{3}$ ×48 lattice at $β = 6.2$ . We demonstrate a smearing algorithm that allows a substantial improvement in the determination of the baryon spectrum obtained using propagators smeared at both source and sink, at only a small computational cost. We investigate the matrix of correlators constructed from local and smeared operators, and are able to expose excited states of both the mesons and baryons.

Received 8 January 1993

DOI:https://doi.org/10.1103/PhysRevD.47.5128

Authors & Affiliations

C. R. Allton^* and C. T. Sachrajda

Physics Department, University of Southampton, Southampton SO9 5NH, United Kingdom

R. M. Baxter, S. P. Booth, K. C. Bowler, S. Collins, D. S. Henty, R. D. Kenway, B. J. Pendleton, D. G. Richards, J. N. Simone, A. D. Simpson, and B. E. Wilkes

Department of Physics, University of Edinburgh, Edinburgh EH9 3JZ, Scotland

C. Michael (UKQCD Collaboration)

Department of Applied Mathematics and Theoretical Physics (DAMTP), University of Liverpool, Liverpool L69 3BX, United Kingdom

^*Present address: Dipartimento di Fisica, Università di Roma I, La Sapienza, 00185 Roma, Italy.

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Vol. 47, Iss. 11 — 1 June 1993

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Physical Review D

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