Recent striking lattice results on bound states above T c are shown to be due to the strong nonconfining Q ¯ Q potential, predicted more than a decade ago in the framework of the field correlator method. Explicit expressions and quantitative estimates are given for Polyakov loop correlators and limiting temperature T D , when bound states dissociate. New theoretical predictions for glueballs an...

Recent striking lattice results on bound states above T c are shown to be due to the strong nonconfining Q ¯ Q potential, predicted more than a decade ago in the framework of the field correlator method. Explicit expressions and quantitative estimates are given for Polyakov loop correlators and limiting temperature T D , when bound states dissociate. New theoretical predictions for glueballs an...

We study the fluctuation spectrum of linearized gravity around non-fine-tuned branes. We focus on the case of an AdS4 brane in AdS5. In this case, for small cosmological constant, the warp factor near the brane is essentially that of a Minkowski brane. However, far from the brane, the metric differs substantially. The space includes the AdS5 boundary, so it has infinite volume. Nonetheless, for...

We review an approach to the construction and classification of p-brane solitons in arbitrary dimensions, with an emphasis on those that arise in toroidally-compactified M-theory. Procedures for constructing the low-energy supergravity limits in arbitrary dimensions, and for studying the supersymmetry properties of the solitons are presented. Wide classes of p-brane solutions are obtained, and ...

We use a bag model to study flavoured mesonic (Qqq̄q̄) and baryonic (Qqqqq) states, where one heavy quark Q is associated with light quarks or antiquarks, and search for possible stable multiquarks. No bound state is found. However some states lie not too high above their dissociation threshold, suggesting the possibility of resonances, or perhaps bound states in improved models. 12.40. Aa, 14.20...

The Coulomb potential is derived in " one space-one time " dimension, and introduced into Dirac and Klein-Gordon equations. The equations are solved, and somewhat surprising result-nonexistence of bound state solutions in the lower dimension-discussed and identified as another fine example of the " Klein paradox " .

Two methods for the nonperturbative solution of field-theoretic bound-state problems, based on light-front coordinates, are briefly reviewed. One uses Pauli–Villars regularization and the other supersymmetry. Applications to Yukawa theory and super Yang–Mills theory with fundamental matter are emphasized .

QCD describes hadrons as valence quarks in a sea of gluons and q̄q pairs. At distances above ∼ 1 GeV quarks acquire an effective constituent mass due to chiral symmetry breaking. A hadron can then be thought of as a bound state of constituent quarks. In the simplest approximation the hadron mass M is then given by the sum of the masses of its constituent quarks mi, first written down by Sakharov...

A baryonic bound state with a mass of O(100) TeV, which is composed of strongly interacting messenger quarks in the low scale gauge mediation, can naturally be the cold dark matter. Interestingly, we find that such a baryonic dark matter is generically metastable, and the decay of this dark matter can naturally explain the anomalous positron flux recently observed by the PAMELA collaboration.

We show that baryons carrying heavy flavors, such as strangeness and charm, can be described by bound states of the corresponding heavy mesons in the background field of the basic SU(2) skyrmion. This method is quantitatively successful to O(N~ ~), in the sense of the large-N c expansion, but at O(1/N,.) it experiences problems associated with our lack of knowledge of higher-derivative terms in...