Thu·Aug 21, 2003Thursday·August 21, 2003

1. 01*

   How light can the Higgs be?

   K. Holland🇺🇸 · J. Kuti🇺🇸

   It is widely believed that, for a given Top mass, the Higgs mass has a lower bound: if m_Higgs is too small, the Higgs vacuum is unstable due to Top dynamics. From vacuum instability, the state-of-the-art calculation of the lower bound is close to the current experimental limit. Using non-perturbative simulations and large N calculations, we show that the vacuum is in fact never unstable. Instead, we investigate the existence of a new lower bound, based on the intrinsic cut-off of this trivial theory.

   hep-lathep-phNucl.Phys.B Proc.Suppl.(2004)·34 citations
2. 02*

   Mesons at finite baryon density in (2+1)d

   Costas G. Strouthos🇺🇸

   We discuss the critical properies of the three-dimensional Gross-Neveu model at nonzero temperature and nonzero chemical potential. We also present numerical and analytical results for the in-medium interaction due to scalar meson exchange. Further, we discuss in-medium modifications of mesonic dispersion relations and wavefunctions.

   hep-latProg.Theor.Phys.Suppl.(2004)·4 citations
3. 03*

   Naturally Light Fermions from Dimensional Reduction

   W. Bietenholz🇩🇪 · A. Gfeller🇨🇭 · U.-J. Wiese🇨🇭

   We consider the 3-d Gross-Neveu model in the broken phase and construct a stable brane world by means of a domain wall and an anti-wall. Fermions of opposite chirality are localized on the walls and coupled through the 3-d bulk. At large wall separation \beta the 2-d correlation length diverges exponentially, hence a 2-d observer cannot distinguish this situation from a 2-d space-time. The 3-d 4-fermion coupling and \beta fix the effective 2-d coupling such that the asymptotic freedom of the 2-d model arises. This mechanism provides criticality without fine tuning.

   hep-lathep-thNucl.Phys.B Proc.Suppl.(2004)·1 citation
4. 04*

   Zone Determinant Expansions for Nuclear Lattice Simulations

   Dean J. Lee (Physics, N.C. State Univ.)🇺🇸 · Ilse C.F. Ipsen (Mathematics, N.C. State Univ.)🇺🇸

   We introduce a new approximation to nucleon matrix determinants that is physically motivated by chiral effective theory. The method involves breaking the lattice into spatial zones and expanding the determinant in powers of the boundary hopping parameter.

   ↳ nucl-thcond-mathep-latPRC(2003)·6 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.