ar X iv : h ep - l at / 9 41 00 17 v 1 2 4 O ct 1 99 4 QCD STRINGS AS CONSTRAINED GRASSMANNIAN SIGMA MODEL
نویسندگان
چکیده
We present calculations for the effective action of string world sheet in R 3 and R 4 utilizing its correspondence with the constrained Grassmannian σ-model. Minimal surfaces describe the dynamics of open strings while harmonic surfaces describe that of closed strings. The one-loop effective action for these are calculated with instanton and anti-instanton background, representing N-string interactions at the tree level. The effective action is found to be the partition function of a classical modified Coulomb gas in the confining phase, with a dynamically generated mass gap.
منابع مشابه
ar X iv : h ep - l at / 9 91 00 40 v 1 2 5 O ct 1 99 9 RUHN - 99 - 3 The Overlap Dirac Operator ⋆
This introductory presentation describes the Overlap Dirac Operator, why it could be useful in numerical QCD, and how it can be implemented.
متن کاملar X iv : h ep - l at / 0 41 00 26 v 1 1 9 O ct 2 00 4 Kaon matrix elements in domain - wall QCD with DBW 2 gauge action
We present calculations of the decay constants and kaon B-parameter BK as the first stage of RBC Collabo-ration's quenched numerical simulations using DBW2 gauge action and domain-wall fermions. Some of potential systematic errors and consistency to previous works are discussed.
متن کاملar X iv : h ep - l at / 0 41 00 34 v 1 2 2 O ct 2 00 4 Hadron Spectrum and Decay Constant from N F = 2 Domain Wall QCD
We report on the first large-scale study of two flavor QCD with domain wall fermions (DWF). Simulation has been carried out at three dynamical quark mass values about 1/2, 3/4, and 1 mstrange on 16 3 × 32 volume with Ls = 12 and a −1 ≈ 1.7 GeV. After discussing the details of the simulation, we report on the light hadron spectrum and decay constants.
متن کاملar X iv : h ep - l at / 9 71 00 31 v 1 8 O ct 1 99 7 1 Finite - temperature chiral transitions in QCD with the Wilson quark
We investigate the finite-temperature phase structure and the scaling of the chiral condensate in lattice QCD with two degenerate light quarks, using a renormalization group improved gauge action and the Wilson quark action. We obtain a phase diagram which is consistent with that from the parity-flavor breaking scenario. The scaling relation for the chiral condensate assuming the critical expon...
متن کاملar X iv : h ep - l at / 9 41 21 00 v 1 2 3 D ec 1 99 4 1 Nonperturbative “ Lattice Perturbation Theory ” ∗
In principle, perturbation theory is unnecessary to solve QCD with lattice methods. Even the short distance calculations relating the lattice action to continuum actions could in principle be done by a → 0, V → ∞ brute force Monte Carlo calculations. In practise, perturbation theory has been essential to the progress of lattice methods. It is much easier and more powerful than Monte Carlo for s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1994