ar X iv : h ep - l at / 0 40 90 43 v 1 1 1 Se p 20 04 Chiral extrapolations with small sea quark mass data in two - flavor lattice
نویسندگان
چکیده
We present results on the light hadron spectrum and quark mass in two-flavor QCD calculated with small sea quark masses down to mP S /mV = 0.35. The configurations are generated using the RG improved gauge and tadpole-improved clover quark action at β = 1.8, where a −1 ≃ 1 GeV. Chiral extrapolations are made using not only polynomials and ChPT in the continuum but also formulae of Wilson chiral perturbation theory (WChPT) including O(a 2) chiral breaking terms. We examine the viability of WChPT and its influence on quark masses.
منابع مشابه
ar X iv : h ep - l at / 0 40 90 95 v 1 1 5 Se p 20 04 Phenomenology of static - light mesons from unquenched lattice QCD calculations
We present results for the static-light meson from unquenched lattice QCD. The unquenched gauge configurations were generated using the non-perturbatively improved clover action. At the fixed lattice spacing of 0.1 fm the lightest sea quark mass used is a third of the strange quark mass. A comparison is made between heavy-light chiral perturbation theory and the f B decay constant. The mass of ...
متن کاملar X iv : h ep - l at / 0 40 90 75 v 1 1 4 Se p 20 04 Sea quark e ff ects in B K from N f = 2 clover - improved Wilson fermions
We report calculations of B K using two flavours of dynamical clover-improved Wilson lattice fermions and look for dependence on the dynamical quark mass at fixed lattice spacing. We see some evidence for dynamical quark effects. In particular B K decreases as the sea quark masses are reduced towards the up/down quark mass. Our meson masses are quite heavy and a firm prediction of B K is a task...
متن کاملar X iv : h ep - p h / 98 10 43 3 v 1 2 1 O ct 1 99 8 SPIN AND ORBITAL ANGULAR MOMENTUM IN THE CHIRAL QUARK MODEL
Quark spin and orbital angular momentum in the nucleon are calculated in symmetry-breaking chiral quark model. The results are compared with data and other models. Synopsis: Recent measurements show (1) strong flavor asymmetry of the antiquark sea 1 : ¯ d > ¯ u, (2) nonzero strange quark content 2 : < ¯ ss > = 0, (3) sum of quark spins is small 3 : < s z > q+¯ q = 0.1 − 0.2, and (4) antiquark s...
متن کاملar X iv : h ep - l at / 0 30 90 81 v 1 1 5 Se p 20 03 1 The mass of the charm quark from unquenched lattice QCD at fixed lattice spacing
We determine the mass of the charm quark (mc) from lattice QCD with two flavors of dynamical quarks with a mass around the strange quark. We compare this to a determination in quenched QCD which has the same lattice spacing (0.1 fm). We investigate different formulations of the quark mass, based on the Vector Ward Identity, PCAC relation and the FNAL heavy quark formalism. Based on these prelim...
متن کاملar X iv : h ep - l at / 0 20 80 37 v 2 1 2 Se p 20 02 1 Towards the Continuum Limit of the Overlap Quark Propagator in
The properties of the momentum space quark propagator in Landau gauge are examined for the overlap quark action in quenched lattice QCD. Numerical calculations were done on two lattices with different lattice spacing a and similar physical volumes to explore the quark propagator in the continuum limit. We have calculated the nonperturbative wavefunction renormalization function Z(p) and the non...
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 2004