BKusing HYP-smeared staggered fermions inNf=2+1unquenched QCD
نویسندگان
چکیده
منابع مشابه
Improvement of the pion spectrum with HYP-smeared staggered fermions
We extend our previous study of taste-symmetry breaking using HYP-smeared staggered fermions in two ways. First, we improve the statistics of a comparison of unimproved and HYP-smeared staggered fermions on quenched lattices with a ≈ 0.1 fm. This allows us to obtain a signal for all pion tastes, rather than just a subset, and thus to make a complete comparison. In addition, it allows us to diff...
متن کاملScaling behavior and sea quark dependence of pion spectrum with HYP-smeared staggered fermions
We study the pion spectrum (and in particular taste-symmetry breaking within it) using HYPsmeared valence staggered fermions on the coarse and fine MILC lattices (which have asqtad staggered sea quarks). We focus on the dependence on lattice spacing and sea-quark mass. We also update our results on source dependence. Our main conclusion is that on the MILC fine lattices the appropriate power-co...
متن کاملDynamical Simulations with Smeared Link Staggered Fermions
One of the most serious problems of the staggered fermion lattice action is flavor symmetry violation. Smeared link staggered fermions can improve flavor symmetry by an order of magnitude relative to the standard thin link action. Over the last few years different smearing transformations have been proposed, both with perturbatively and non-perturbatively determined coefficients. What hindered ...
متن کاملPenguin Diagrams for the Hyp Staggered Fermions *
The low energy effective Hamiltonian of the standard model includes ∆S = 1 four-fermion operators with corresponding Wilson coefficients, which contains all the short-distance physics. The low energy effects of the electroweak and strong interactions can be expressed in terms of matrix elements of the four-fermion operators between hadronic states. Lattice QCD is wellsuited to calculate these m...
متن کاملCalculating BK using HYP staggered fermions
We give an update on our calculation of BK using HYP-smeared valence staggered quarks. We have results for BK at tree-level on several coarse MILC lattices (a ≈ 0.12fm) and one of the fine lattices (a ≈ 0.09fm), using 10 light valence quarks ranging down to m s /10. We have generalized staggered chiral perturbation theory to our mixed action setup, and outline the results. We explain our presen...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review D
سال: 2010
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.82.114509