Structure functions and form factors close to the chiral limit from lattice QCD

T. Bakeyev; G. Galletly; M. Göckeler; M. Gürtler; R. Horsley; B. Joó; A. D. Kennedy; B. Pendleton; H. Perlt; D. Pleiter; P. E.L. Rakow; G. Schierholz; A. Schiller; T. Streuer; H. Stüben

doi:10.1016/S0920-5632(03)02462-9

Structure functions and form factors close to the chiral limit from lattice QCD

T. Bakeyev, G. Galletly, M. Göckeler, M. Gürtler, R. Horsley, B. Joó, A. D. Kennedy, B. Pendleton, H. Perlt, D. Pleiter, P. E.L. Rakow, G. Schierholz, A. Schiller, T. Streuer, H. Stüben

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Abstract

Results for nucleon matrix elements (arising from moments of structure functions) and form factors from a mixture of runs using Wilson, clover and overlap fermions (both quenched and unquenched) are presented and compared in an effort to explore the size of the chiral 'regime', lattice spacing errors and quenching artefacts. While no run covers this whole range of effects the partial results indicate a picture of small lattice spacing errors, small quenching effects and only reaching the chiral regime at rather light quark masses.

Original language	English
Pages (from-to)	82-88
Number of pages	7
Journal	Nuclear Physics B - Proceedings Supplements
Volume	128
DOIs	https://doi.org/10.1016/S0920-5632(03)02462-9
State	Published - Feb 2004
Externally published	Yes

Funding

The Wilson and clover numerical calculations were performed on the Hitachi SR8000a t LRZ (Munich), the Cray T.3Es at EPCC (Edinburgh), NIC (Jiilich) and ZIB (Berlin) as well as the APE/Quadrics at NIC (Zeuthen). The overlap numerical calculations were performed at NIC Jiilich, HLRN/ZIB Berlin and NeSC Edinburgh (IBM Regattas), NIC Zeuthen and Southampton (PC Clusters), and HPCF Cran-field (SunFire). We thank all these institutions for support. This work is supported by the European Community’s Human Potential Program under contract HPRN-CT-2000-00145 Hadrons/Lattice QCD and by the DFG under contract FOR 465 (Forschergruppe Gitter-Hadronen-Phanomenologie) .

Funders	Funder number
European Community’s Human Potential Program	HPRN-CT-2000-00145 Hadrons/Lattice QCD
Deutsche Forschungsgemeinschaft	FOR 465

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Bakeyev, T., Galletly, G., Göckeler, M., Gürtler, M., Horsley, R., Joó, B., Kennedy, A. D., Pendleton, B., Perlt, H., Pleiter, D., Rakow, P. E. L., Schierholz, G., Schiller, A., Streuer, T., & Stüben, H. (2004). Structure functions and form factors close to the chiral limit from lattice QCD. Nuclear Physics B - Proceedings Supplements, 128, 82-88. https://doi.org/10.1016/S0920-5632(03)02462-9

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title = "Structure functions and form factors close to the chiral limit from lattice QCD",

abstract = "Results for nucleon matrix elements (arising from moments of structure functions) and form factors from a mixture of runs using Wilson, clover and overlap fermions (both quenched and unquenched) are presented and compared in an effort to explore the size of the chiral 'regime', lattice spacing errors and quenching artefacts. While no run covers this whole range of effects the partial results indicate a picture of small lattice spacing errors, small quenching effects and only reaching the chiral regime at rather light quark masses.",

author = "T. Bakeyev and G. Galletly and M. G{\"o}ckeler and M. G{\"u}rtler and R. Horsley and B. Jo{\'o} and Kennedy, {A. D.} and B. Pendleton and H. Perlt and D. Pleiter and Rakow, {P. E.L.} and G. Schierholz and A. Schiller and T. Streuer and H. St{\"u}ben",

year = "2004",

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doi = "10.1016/S0920-5632(03)02462-9",

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Bakeyev, T, Galletly, G, Göckeler, M, Gürtler, M, Horsley, R, Joó, B, Kennedy, AD, Pendleton, B, Perlt, H, Pleiter, D, Rakow, PEL, Schierholz, G, Schiller, A, Streuer, T & Stüben, H 2004, 'Structure functions and form factors close to the chiral limit from lattice QCD', Nuclear Physics B - Proceedings Supplements, vol. 128, pp. 82-88. https://doi.org/10.1016/S0920-5632(03)02462-9

TY - JOUR

T1 - Structure functions and form factors close to the chiral limit from lattice QCD

AU - Bakeyev, T.

AU - Galletly, G.

AU - Göckeler, M.

AU - Gürtler, M.

AU - Horsley, R.

AU - Joó, B.

AU - Kennedy, A. D.

AU - Pendleton, B.

AU - Perlt, H.

AU - Pleiter, D.

AU - Rakow, P. E.L.

AU - Schierholz, G.

AU - Schiller, A.

AU - Streuer, T.

AU - Stüben, H.

PY - 2004/2

Y1 - 2004/2

N2 - Results for nucleon matrix elements (arising from moments of structure functions) and form factors from a mixture of runs using Wilson, clover and overlap fermions (both quenched and unquenched) are presented and compared in an effort to explore the size of the chiral 'regime', lattice spacing errors and quenching artefacts. While no run covers this whole range of effects the partial results indicate a picture of small lattice spacing errors, small quenching effects and only reaching the chiral regime at rather light quark masses.

AB - Results for nucleon matrix elements (arising from moments of structure functions) and form factors from a mixture of runs using Wilson, clover and overlap fermions (both quenched and unquenched) are presented and compared in an effort to explore the size of the chiral 'regime', lattice spacing errors and quenching artefacts. While no run covers this whole range of effects the partial results indicate a picture of small lattice spacing errors, small quenching effects and only reaching the chiral regime at rather light quark masses.

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VL - 128

SP - 82

EP - 88

JO - Nuclear Physics B - Proceedings Supplements

JF - Nuclear Physics B - Proceedings Supplements

ER -

Structure functions and form factors close to the chiral limit from lattice QCD

Abstract

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