Wed·Sep 26, 2001Wednesday·September 26, 2001

1. 01*

   Quark-gluon vertex in a momentum subtraction scheme

   J.Skullerud🇩🇪 · A.Kizilersu🇦🇺 · A.G.Williams🇦🇺

   We compute the quark-gluon vertex in quenched QCD, in the Landau gauge using an off-shell mean-field O(a)-improved fermion action. The running coupling is calculated in an `asymmetric' momentum subtraction scheme (MOM~). We obtain a crude estimate for Lambda_MSbar=170+/-65 MeV, which is considerably lower than other determinations of this quantity. However, substantial systematic errors remain.

   hep-lathep-phNucl.Phys.B Proc.Suppl.(2002)·20 citations
2. 02*

   The strangeness content of the nucleon

   C. Michael · C. McNeile · D. Hepburn · UKQCD Collaboration

   We evaluate the matrix element of $\bar{q}q$ in hadron states on a lattice. We find substantial mixing of the connected and disconnected contributions so that the lattice result that the disconnected contribution to the nucleon is large does not imply that the $\bar{s}s$ content is large. This has implications for dark matter searches.

   hep-latNucl.Phys.B Proc.Suppl.(2002)·39 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.