Wed·Sep 19, 2007Wednesday·September 19, 2007

1. 01*

   The complete lowest order chiral Lagrangian from a little box

   Thomas DeGrand🇺🇸 · Stefan Schaefer🇩🇪

   We recently performed a pilot study determining the parameters of the leading order chiral Lagrangian from distributions of the eigenvalues of a quenched Dirac operator coupled to an imaginary isospin chemical potential. We complement a quick survey of our recent preprint arXiv:0708.1731 [hep-lat] by addressing some points raised during discussions at the conference.

   hep-latPoS(2007)·7 citations
2. 02*

   B(Ds^+ -> l^+ nu) and the Decay Constant f_(D_s^+)

   Sheldon Stone🇺🇸

   I report final CLEO-c results on the purely leptonic decays of the D_s^+ -> l^+ nu, for the cases when l^+ is a mu^+ or tau^+, when it decays into pi^+ anti-nu, using 314/pb of data at 4.170 GeV. I also include preliminary results from the tau^+ -> e^+ nu anti-nu channel using 195/pb. Combining both we measure f_{D_s}= 275 +/- 10 +/- 5 MeV, and f_{D_s^+}/{f_{D^+}=1.24 +/- 0.10 =/- 0.03 .

   ↳ hep-exhep-lathep-ph3 citations
3. 03*

   The Color Antisymmetric Ghost Propagator and One-Loop Vertex Renormalization

   Sadataka Furui🇯🇵

   The color matrix elements of the ghost triangle diagram that appears in the triple gluon vertex and the ghost-ghost-gluon triangle diagram that appears in the ghost-gluon-ghost vertex are calculated. The ghost-ghost-gluon triangle contains a loop consisting of two color diagonal ghosts and one gluon and a loop consisting of two color antisymmetric ghosts and one gluon. Consequently, the pQCD argument in the infrared region based on the one particle irreducible diagram should be modified. Implications for the Kugo-Ojima color confinement and the QCD running coupling are discussed.

   ↳ hep-phhep-latProg.Theor.Phys.(2008)·4 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.