ar X iv : 0 70 8 . 34 27 v 1 [ he p - la t ] 2 5 A ug 2 00 7 Meson masses at large N c
نویسندگان
چکیده
We analyze the meson spectrum in SU(N c) lattice gauge theory. We use Wilson quarks to measure the pseudoscalar and vector masses in SU(2), SU(3), SU(4) and SU(6), and extrapolate to the large–N c limit. We find that finite–N c corrections are small at all values of the quark mass.
منابع مشابه
ar X iv : 0 80 8 . 10 17 v 1 [ he p - la t ] 7 A ug 2 00 8 Efficient use of the Generalized Eigenvalue Problem
We analyze the systematic errors made when using the generalized eigenvalue problem to extract energies and matrix elements in lattice gauge theory. Effective theories such as HQET are also discussed. Numerical results are shown for the extraction of ground-state and excited B-meson masses and the ground-state decay constant in the static approximation.
متن کاملar X iv : 0 70 8 . 22 46 v 1 [ he p - la t ] 1 6 A ug 2 00 7 10 TEV monopoles and topology of the Standard Model
It is shown that unification of strong and Electroweak interactions at Tev scale may lead to appearance of topologically stable monopoles with masses of the order of 10 Tev. In particlular, in the realistic Petite Unification Theory (PUT) such objects appear as a result of the breakdown SU(4)⊗SU(2)3 → SU(3)×SU(2)×U(1)/Z3. Those monopoles may play an important role in the early Universe, at fini...
متن کاملar X iv : 0 70 8 . 12 95 v 1 [ he p - la t ] 9 A ug 2 00 7 Why rooting fails
I explore the origins of the unphysical predictions from rooted staggered fermion algorithms. Before rooting, the exact chiral symmetry of staggered fermions is a flavored symmetry among the four "tastes." The rooting procedure averages over tastes of different chiralities. This averaging forbids the appearance of the correct 't Hooft vertex for the target theory.
متن کاملar X iv : 0 70 8 . 17 19 v 1 [ he p - th ] 1 3 A ug 2 00 7 Characters of the Unitarizable Highest Weight Modules over the N =
The N=2 superconformal (or super-Virasoro) algebras in two dimensions are three complex Lie superalgebras: the Neveu-Schwarz superalgebra [1], the Ramond superal-gebra [1], the twisted superalgebra [2], which are denoted as A, P, T , resp., or G when a statement holds for all three superalgebras. They have the following nontrivial super-Lie brackets :
متن کاملar X iv : 0 71 0 . 09 63 v 1 [ he p - la t ] 4 O ct 2 00 7 Screening masses of mesons in 2 + 1 flavour QCD
We present results for screening masses of light and strange mesons in 2 + 1 flavour QCD using improved (p4fat3) staggered fermions on 6×243 lattices. We have studied the screening masses of scalar, pseudo-scalar, vector and axial-vector mesons along the line of constant physics, determined by a pion mass ≈ 220 MeV and a kaon mass ≈ 500 MeV. In order to investigate the cut-off and volume depend...
متن کامل