Lattice evidence for the family of decoupling solutions of Landau gauge Yang-Mills theory
详细信息    查看全文
文摘
We show that the low-momentum behavior of the lattice Landau-gauge gluon and ghost propagators is sensitive to the lowest non-trivial eigenvalue () of the Faddeev-Popov operator. If the gauge fixing favors Gribov copies with small the ghost dressing function rises more rapidly towards zero momentum than on copies with large . This effect is seen for momenta below 1 GeV, and interestingly also for the gluon propagator at momenta below 0.2 GeV: For large the gluon propagator levels out to a lower value at zero momentum than for small . For momenta above 1 GeV no dependence on Gribov copies is seen. Although our data is only for a single lattice size and spacing, a comparison to the corresponding (decoupling) solutions from the DSE/FRGE study of Fischer, Maas and Pawlowski (2009) yields already a good qualitative agreement.
NGLC 2004-2010.National Geological Library of China All Rights Reserved.
Add:29 Xueyuan Rd,Haidian District,Beijing,PRC. Mail Add: 8324 mailbox 100083
For exchange or info please contact us via email.