Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Claudio Parrinello"'
Publikováno v:
Physical Review D. 50:3059-3075
Motivated by the possibility of experimental determination of top quark form factors in upcoming [ital e][sup +][ital e][sup [minus]] experiments, as recently discussed by Atwood and Soni, we show at the one loop level that the conventionally defined
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2856e4fd1837deecd06080a44611021c
https://doi.org/10.1103/physrevd.50.3059
https://doi.org/10.1103/physrevd.50.3059
Publikováno v:
Progress of Theoretical Physics Supplement. 111:83-113
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ee10c51b36f60af232057a749be3d8c
https://doi.org/10.1143/ptps.111.83
https://doi.org/10.1143/ptps.111.83
Publikováno v:
Physics Letters B. 289:405-410
We study the influence of Gribov copies in the Coulomb gauge on the smeared hadronic correlation functions that are involved in the determination of the B meson decay constant. We find that the residual gauge freedom associated to Gribov copies induc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bb5ea42401a13bfe548b6c865cdb9e4a
https://doi.org/10.1016/0370-2693(92)91240-a
https://doi.org/10.1016/0370-2693(92)91240-a
Autor:
Stefano Fachin, Claudio Parrinello
Publikováno v:
Physical Review D. 44:2558-2564
We propose a covariant, nonperturbative gauge-fixing procedure for lattice gauge theories that avoids the problem of Gribov copies. This is closely related to a recent proposal for a gauge fixing in the continuum that we review. The lattice gauge-fix
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::232c846e416b973c64da7ac2cd4271e4
https://doi.org/10.1103/physrevd.44.2558
https://doi.org/10.1103/physrevd.44.2558
Publikováno v:
Physics Letters B. 268:236-240
We report on simulations of pure SU(3) gauge theory on a 10 3 ×20 lattice at β =6.0 in the Coulomb gauge, from which the Gribov ambiguity appears to be maximal, in the sense that the gauge-fixing process is highly unstable with respect to variation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a193550e95d2d9b39abb72f9fc3c9a27
https://doi.org/10.1016/0370-2693(91)90810-d
https://doi.org/10.1016/0370-2693(91)90810-d
Publikováno v:
Nuclear Physics B. 362:487-497
We unambiguously show the existence of Gribov copies in a pure SU(3) gauge lattice model, with Wilson action. We show that the usual steepest-descent algorithms used for implementing the lattice Landau gauge lead to ambiguities, which are related to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19ad0f83397c08f9b1a6d49e86a914bb
https://doi.org/10.1016/0550-3213(91)90570-n
https://doi.org/10.1016/0550-3213(91)90570-n
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 20:199-202
We give numerical evidence of gauge-fixing ambiguities in the standard lattice implementation of the Landau gauge
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ed791e9cd62a2b43470423a2a703db6
https://doi.org/10.1016/0920-5632(91)90908-w
https://doi.org/10.1016/0920-5632(91)90908-w
Publikováno v:
Scopus-Elsevier
Scaling of the Landau gauge gluon propagator calculated at beta=6.0 and at beta=6.2 is demonstrated. A variety of functional forms for the gluon propagator calculated on a large (32^3x64) lattice at beta=6.0 are investigated.
LATTICE98(confine),
LATTICE98(confine),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f2f03923c243931fad53fc67646aacf
https://doi.org/10.1016/s0920-5632(99)85157-3
https://doi.org/10.1016/s0920-5632(99)85157-3
Autor:
Claudio Parrinello
Publikováno v:
Nuclear Physics B - Proceedings Supplements. 53:331-333
We report on some attempts to use lattice QCD to investigate topics in strong interactions phenomenology which are usually interpreted in terms of soft Pomeron exchange.
Talk presented at LAT96, 3 pages, Latex, one style file and 2 PostScript pi
Talk presented at LAT96, 3 pages, Latex, one style file and 2 PostScript pi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1639a0105b50f18603403133a5448b80
https://doi.org/10.1016/s0920-5632(96)00652-4
https://doi.org/10.1016/s0920-5632(96)00652-4
We review many topics and results about numeric gauge fixing in lattice QCD.
Comment: 47 pages, 16 eps figures. Review article sent to IJMPA
Comment: 47 pages, 16 eps figures. Review article sent to IJMPA
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef169a3f9e7ce195a216e7d54649e0ca
http://hdl.handle.net/10281/24733
http://hdl.handle.net/10281/24733
