منابع مشابه
Heavy Hybrids with Constituent Gluons
Hybrid meson energies are calculated in the static quark limit with the Dynamical Quark Model (DQM). In the DQM, transverse gluons are represented as effective constituents with a dynamically generated mass. Hybrid masses are determined within the Tamm-Dancoff approximation for the resulting relativistic Salpeter equation. Although the general features of the adiabatic potential surfaces corres...
متن کاملGlueballs and Hybrids (Gluons as Constituents)
In addition to the familiar baryons made from three quarks and mesons made from a quark and an antiquark, the spectrum of QCD is expected to contain glueballs, hybrids and multiquark states. Since the earliest lattice QCD calculations it has been recognized that lattice QCD should be used to calculate the properties of these particles. Hopefully, lattice results will help to sort out which of t...
متن کاملSe p 19 95 CONSTITUENT GLUONS FROM QCD
The notion of constituent gluon is introduced as a gluon propagating in the vacuum background field. The Hamiltonian approach for a system containing such gluon and a q ¯ qg pair is formulated, and the masses of lowest q ¯ qg hybrids are estimated. In the QCD–motivated constituent models not only quarks but also glu-ons should be confined, so that the states containing constituent glue should e...
متن کاملSoft Gluons Are Heavy and Rowdy *
We study dynamical mass generation in pure Yang-Mills theory and report on a recently developed ansatz that exactly solves the tower of Dyson-Schwinger equations in Landau gauge at low Euclidean momentum, featuring enhanced gluon-gluon vertices, a finite ghost-gluon vertex in agreement with an old argument of Taylor, and an IR suppressed gluon propagator. This ansatz reinforces arguments in fav...
متن کاملHeavy Hybrids from NRQCD
We present a quenched lattice calculation for the lowest lying bb̄g-hybrid states in the framework of NRQCD using the leading order Hamiltonian up to O(mv). We demonstrate the existence of a nearly degenerate rotational band of states with an excitation energy approximately 1.6 GeV above the Υ ground state. This lies around the BB̄ J threshold but well above the BB̄-threshold. Therefore a heavy hy...
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: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.59.014035