Mon·Aug 29, 2005Monday·August 29, 2005

1. 01*

   Spontaneous chiral-symmetry breaking of lattice QCD with massless dynamical quarks

   Xiang-Qian Luo🇨🇳

   One of the most challenging issues in QCD is the investigation of spontaneous chiral-symmetry breaking, which is characterized by the non-vanishing chiral condensate when the bare fermion mass is zero. In standard methods, one has to perform expensive lattice simulations at multiple bare quark masses, and employ some modeled function to extrapolate the data to the chiral limit. This paper applies the probability distribution function method to computing the chiral condensate in lattice QCD with massless dynamical quarks, without any ambiguous mass extrapolation. The results for staggered quarks indicates that the method might be a more efficient alternative for investigating the spontaneous chiral-symmetry breaking in lattice QCD.

   hep-latSci.China G(2007)·1 citation
2. 02*

   Dynamical overlap fermions: techniques and results

   Stefan Schaefer🇺🇸 · Thomas DeGrand🇺🇸

   We summarize our recent investigations of lattice QCD with dynamical overlap fermions. We sketch algorithmic issues and our approach to solving them. We show our measurement of the topological susceptibility. We describe a computation of the chiral condensate using an analysis of the distribution of eigenmodes of the Dirac operator and Random Matrix Theory.

   hep-latPoS(2006)·16 citations
3. 03*

   Heavy cosmic strings

   M. Donaire🇬🇧 · A. Rajantie🇬🇧

   We argue that cosmic strings with high winding numbers generally form in first-order gauge symmetry breaking phase transitions, and we demonstrate this using computer simulations. These strings are heavier than single-winding strings and therefore more easily observable. Their cosmological evolution may also be very different.

   ↳ hep-phastro-phhep-lathep-thPRD(2006)·17 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.