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Publikováno v:
Nuclear Physics B. 496:377-407
We explore the first stage of the Symanzik improvement program for lattice Dirac fermions, namely the construction of doubler-free, highly improved classical actions on isotropic as well as anisotropic lattices (where the temporal lattice spacing, a_
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19189ce612b8b337dacb8f9726dddef7
https://doi.org/10.1016/s0550-3213(97)00249-6
https://doi.org/10.1016/s0550-3213(97)00249-6
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 53:861-866
We describe two ideas useful in the construction of highly improved quark actions for simulations on coarse lattices: (1) Field transformations to solve the doubler problem without destroying tree-level improvement for on- or off-shell quantities. (2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::60f8c658155e71fd0a0c60b682ac72c7
https://doi.org/10.1016/s0920-5632(96)00803-1
https://doi.org/10.1016/s0920-5632(96)00803-1
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 47:370-373
We investigate a new light fermion action (the ``D234'' action), which is accurate up to $\O(a^3)$ and tadpole-improved $\O(a \alpha_s)$ errors. Using D234 with Symanzik- and tadpole-improved glue we find evidence that continuum results for the quenc
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f14e3807b22d71b484e3f688a0f89b7
https://doi.org/10.1016/0920-5632(96)00076-x
https://doi.org/10.1016/0920-5632(96)00076-x
Publikováno v:
International Journal of Modern Physics B. :3617-3648
We review recent results concerning the representation of conformal field theory characters in terms of fermionic quasi-particle excitations, and describe in detail their construction in the case of the integrable three-state Potts chain. These fermi
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93c2f13bea4dcfa6ab47e14b7d3609a4
https://doi.org/10.1142/s0217979293003437
https://doi.org/10.1142/s0217979293003437
Publikováno v:
Physics Letters B. 304:263-270
We present fermionic quasi-particle sum representations for some of the characters (or branching functions) of ~${(G^{(1)})_1 \times (G^{(1)})_1 \o (G^{(1)})_2}$ ~for all simply-laced Lie algebras $G$. For given $G$ the characters are written as the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ebf54f06464279e877071a25ec4281f
https://doi.org/10.1016/0370-2693(93)90292-p
https://doi.org/10.1016/0370-2693(93)90292-p
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 63:862-864
We investigate a tadpole-improved tree-level-O(a^3)-accurate action, D234c, on coarse lattices, using the mean link in Landau gauge to measure the tadpole contribution. We find that D234c shows much better rotational invariance than Sheikholeslami-Wo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99838d243ec78332851f91c3694b0dfe
https://doi.org/10.1016/s0920-5632(97)00922-5
https://doi.org/10.1016/s0920-5632(97)00922-5
Autor:
T.R. Klassen
Publikováno v:
Physical review. D, Particles and fields. 51(9)
We present a simple parametrization of the running coupling constant {alpha}{sub {ital V}}({ital q}), defined via the static potential, that interpolates between two-loop QCD in the UV and the string prediction {ital V}({ital r})={sigma}{ital r}{minu
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecc8465dda6425259368c021db17bd70
https://pubmed.ncbi.nlm.nih.gov/10018986
https://pubmed.ncbi.nlm.nih.gov/10018986
Autor:
T.R. Klassen
By (a) using an expression for the LATTICE potential of QCD in terms of a CONTINUUM running coupling and (b) globally parameterizing this coupling to interpolate between 2- (or higher-) loop QCD in the UV and the flux tube prediction in the IR, we ca
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee3531da96a5ef43f506456e968f08b6
http://arxiv.org/abs/hep-lat/9412022
http://arxiv.org/abs/hep-lat/9412022
We present sum representations for all characters of the unitary Virasoro minimal models. They can be viewed as fermionic companions of the Rocha-Caridi sum representations, the latter related to the (bosonic) Feigin-Fuchs-Felder construction. We als
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https://explore.openaire.eu/search/publication?articleId=doi_dedup___::648872b80bff3d64e11a63874bee9b6a