Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing

C. R. Allton; S. P. Booth; K. C. Bowler; J. Garden; A. Hart; D. Hepburn; A. C. Irving; B. Joó; R. D. Kenway; C. M. Maynard; C. McNeile; C. Michael; S. M. Pickles; J. C. Sexton; K. J. Sharkey; Z. Sroczynski; M. Talevi; M. Teper; H. Wittig

doi:10.1103/PhysRevD.65.054502

Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing

C. R. Allton^*, S. P. Booth, K. C. Bowler, J. Garden, A. Hart, D. Hepburn, A. C. Irving, B. Joó, R. D. Kenway, C. M. Maynard, C. McNeile, C. Michael, S. M. Pickles, J. C. Sexton, K. J. Sharkey, Z. Sroczynski, M. Talevi, M. Teper, H. Wittig

^*Corresponding author for this work

School of Engineering, Computing and Mathematics

Research output: Contribution to journal › Article › peer-review

Abstract

We present results for the static interquark potential, lightest glueballs, light hadron spectrum, and topological susceptibility using a nonperturbatively improved action on a 16³×32 lattice at a set of values of the bare gauge coupling and bare dynamical quark mass chosen to keep the lattice size fixed in physical units (∼1.7 fm). By comparing these measurements with a matched quenched ensemble, we study the effects due to two degenerate flavors of dynamical quarks. With the greater control over residual lattice spacing effects which these methods afford, we find some evidence of charge screening and some minor effects on the light hadron spectrum over the range of quark masses studied (M_PS/M_v ≥ 0.58, where PS denotes pseudoscalar and V denotes vector). More substantial differences between quenched and unquenched simulations are observed in measurements of topological quantities.

Original language	English
Article number	054502
Journal	Physical Review D
Volume	65
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.65.054502
Publication status	Published - 2002

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Allton, C. R., Booth, S. P., Bowler, K. C., Garden, J., Hart, A., Hepburn, D., Irving, A. C., Joó, B., Kenway, R. D., Maynard, C. M., McNeile, C., Michael, C., Pickles, S. M., Sexton, J. C., Sharkey, K. J., Sroczynski, Z., Talevi, M., Teper, M., & Wittig, H. (2002). Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing. Physical Review D, 65(5), Article 054502. https://doi.org/10.1103/PhysRevD.65.054502

@article{5aeb5bdc09ad436ca43b3b8a1d936aa4,

title = "Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing",

abstract = "We present results for the static interquark potential, lightest glueballs, light hadron spectrum, and topological susceptibility using a nonperturbatively improved action on a 163×32 lattice at a set of values of the bare gauge coupling and bare dynamical quark mass chosen to keep the lattice size fixed in physical units (∼1.7 fm). By comparing these measurements with a matched quenched ensemble, we study the effects due to two degenerate flavors of dynamical quarks. With the greater control over residual lattice spacing effects which these methods afford, we find some evidence of charge screening and some minor effects on the light hadron spectrum over the range of quark masses studied (MPS/Mv ≥ 0.58, where PS denotes pseudoscalar and V denotes vector). More substantial differences between quenched and unquenched simulations are observed in measurements of topological quantities.",

author = "Allton, {C. R.} and Booth, {S. P.} and Bowler, {K. C.} and J. Garden and A. Hart and D. Hepburn and Irving, {A. C.} and B. Jo{\'o} and Kenway, {R. D.} and Maynard, {C. M.} and C. McNeile and C. Michael and Pickles, {S. M.} and Sexton, {J. C.} and Sharkey, {K. J.} and Z. Sroczynski and M. Talevi and M. Teper and H. Wittig",

year = "2002",

doi = "10.1103/PhysRevD.65.054502",

language = "English",

volume = "65",

journal = "Physical Review D",

issn = "0556-2821",

publisher = "American Institute of Physics",

number = "5",

}

Allton, CR, Booth, SP, Bowler, KC, Garden, J, Hart, A, Hepburn, D, Irving, AC, Joó, B, Kenway, RD, Maynard, CM, McNeile, C, Michael, C, Pickles, SM, Sexton, JC, Sharkey, KJ, Sroczynski, Z, Talevi, M, Teper, M & Wittig, H 2002, 'Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing', Physical Review D, vol. 65, no. 5, 054502. https://doi.org/10.1103/PhysRevD.65.054502

TY - JOUR

T1 - Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing

AU - Allton, C. R.

AU - Booth, S. P.

AU - Bowler, K. C.

AU - Garden, J.

AU - Hart, A.

AU - Hepburn, D.

AU - Irving, A. C.

AU - Joó, B.

AU - Kenway, R. D.

AU - Maynard, C. M.

AU - McNeile, C.

AU - Michael, C.

AU - Pickles, S. M.

AU - Sexton, J. C.

AU - Sharkey, K. J.

AU - Sroczynski, Z.

AU - Talevi, M.

AU - Teper, M.

AU - Wittig, H.

PY - 2002

Y1 - 2002

N2 - We present results for the static interquark potential, lightest glueballs, light hadron spectrum, and topological susceptibility using a nonperturbatively improved action on a 163×32 lattice at a set of values of the bare gauge coupling and bare dynamical quark mass chosen to keep the lattice size fixed in physical units (∼1.7 fm). By comparing these measurements with a matched quenched ensemble, we study the effects due to two degenerate flavors of dynamical quarks. With the greater control over residual lattice spacing effects which these methods afford, we find some evidence of charge screening and some minor effects on the light hadron spectrum over the range of quark masses studied (MPS/Mv ≥ 0.58, where PS denotes pseudoscalar and V denotes vector). More substantial differences between quenched and unquenched simulations are observed in measurements of topological quantities.

AB - We present results for the static interquark potential, lightest glueballs, light hadron spectrum, and topological susceptibility using a nonperturbatively improved action on a 163×32 lattice at a set of values of the bare gauge coupling and bare dynamical quark mass chosen to keep the lattice size fixed in physical units (∼1.7 fm). By comparing these measurements with a matched quenched ensemble, we study the effects due to two degenerate flavors of dynamical quarks. With the greater control over residual lattice spacing effects which these methods afford, we find some evidence of charge screening and some minor effects on the light hadron spectrum over the range of quark masses studied (MPS/Mv ≥ 0.58, where PS denotes pseudoscalar and V denotes vector). More substantial differences between quenched and unquenched simulations are observed in measurements of topological quantities.

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U2 - 10.1103/PhysRevD.65.054502

DO - 10.1103/PhysRevD.65.054502

M3 - Article

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SN - 0556-2821

VL - 65

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 054502

ER -

Effects of nonperturbatively improved dynamical fermions in QCD at fixed lattice spacing

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