Showing papers in "Progress in Particle and Nuclear Physics in 2003"

TL;DR: The Gaussian Expansion Method (GEM) as discussed by the authors was proposed for bound and scattering states of few-body systems and has been applied to a variety of fewbody systems, such as the determination of antiproton mass by the analysis of laser spectroscopic data for antiproptonic helium atoms, predictions and experimental verifications on the structure of hypernuclei and hyperon-nucleon interactions.

TL;DR: In this article, the authors summarize the theoretical properties of the Standard Model Higgs boson and the Higgs sector of the minimal super-symmetric extension of the standard model (MSSM).

TL;DR: In this article, the authors review investigations of the quark confinement mechanism that have been carried out in the framework of SU(N) lattice gauge theory and emphasize the special role of ZN center symmetry.

TL;DR: In this article, a short exposition of the relevant ideas, techniques and applications of conformal symmetry to various problems of interest is given. But the Lagrangian of Quantum Chromodynamics is invariant under conformal transformations.

TL;DR: In this article, the authors demonstrate that there exists a coherent picture of strong interactions, based on instantons, for soft high-energy scattering in light hadrons, with no fitting parameters.

TL;DR: In this article, a review of the state-of-the-art results for low-lying nucleon resonances can be found, focusing on experiments aiming at precise studies of the low lying nucleon resonance.

TL;DR: In this article, the authors review recent progress on understanding QCD dynamics involved in exclusive B meson decays, including light-cone sum rules, QCD factorization, perturbative QCD, softcollinear effective theory, light-front QCD and lattice QCD.

TL;DR: In this paper, the mass of the nucleon as a function of pion mass within chiral perturbation theory was formulated using a number of different ultra-violet regularisation schemes; including dimensional regularisation and various finite-ranged regulators.

TL;DR: A review of the recent results from parametric studies, astrophysical models, and observational studies of the r-process can be found in this article, where the interplay between nuclear physics and astrophysics is emphasized.

TL;DR: In this article, the results of the hypercentral Constituent Quark Model (hCQM) with spin independent three-quark interaction have been reported for the S11(1535) resonance.

TL;DR: In this article, the neutron electric form factor GE,n has been measured at three different four-momentum transfer in a D(|e|→, e′| e|→)p experiment.

TL;DR: In this article, a summary of results for exclusive decays of single and double heavy-flavored baryons in the relativistic three-quark model is presented.

TL;DR: A review of searches for physics beyond the Standard Model carried out at high energy leptonhadron and hadron-hadron facilities is presented, with emphasis on topics of interest for future data taking at the upgraded Tevatron p p and HERA ep colliders.

TL;DR: In this article, the authors summarize recent progress in soft QCD modeling based on the set of Dyson-Schwinger equations truncated to ladder-rainbow level, and compare the dressed quark propagator, pseudoscalar and vector meson masses as a function of quark mass.

TL;DR: In this paper, it is shown how the QCD sum rules can be applied for the investigation of the density dependence of the nucleon parameters, expressed through the expectation values of QCD operators in nuclear matter.

TL;DR: In this article, a new facility for GeV γ-ray beams in an energy range of 1.5-2.4 GeV has been constructed for developing hadron physics at SPring-8.

TL;DR: In this paper, a tree-level analysis of the p ( γ, K ) Y and e, e, e 'k ) Y observables is presented, and it is shown that the background diagrams play a predominant role in the reaction dynamics.

TL;DR: An overview of the idea behind the physics of the MAMI laboratory and its realization is given in this paper, where some highlights of results at MAMI are presented illustrating this idea and new significant experiments to proceed with this approach to QCD are discussed.

TL;DR: In this article, the K-meson production in elementary proton induced reactions is studied exclusively at the external COSY beam using the time-of-flight spectrometer TOF.

TL;DR: In this article, the authors measured the reaction γp → π ° γ ′ p with the TAPS BaF 2 calorimeter at the Mainz Microtron accelerator facility MAMI for energies between √2 = 1221 − 1331 MeV.

TL;DR: In this article, the Kugo-Ojima confinement criterion and its relation to the infrared behavior of the gluon and ghost propagators are reviewed and the results are in good agreement with corresponding lattice data obtained recently.

TL;DR: In recent years, it has been realized that effective interactions, those valid over a limited range of energymomentum, are often preferable even when more complete theories are available as mentioned in this paper.

TL;DR: In this article, the theoretical justification of chiral symmetry restoration in high-lying hadrons is presented, and the evidence and theoretical justification for chiral symmetrized hadrons are presented.

TL;DR: In this paper, a unified quark and gluon description of mesons, glueballs and exotic hybrids is presented for a relativistic field theoretical Hamiltonian in the Coulomb gauge.

TL;DR: In this article, the spectral properties of hadrons in hot and dense matter are discussed with focus on spontaneously broken chiral symmetry in the vacuum and its restoration in the medium, and the authors propose a spectral model of the hadrons.

TL;DR: A brief review of the structure of the nucleon as determined through parity-violating electron scattering is presented in this paper, where the relationship between the electromagnetic and neutral weak currents is developed in a pedagogical introduction.

TL;DR: In this article, the authors summarized the results obtained by the Paris group during the last few years on the effects of quark degrees of freedom in the NN interaction and showed that quark degree of freedom has a strong effect on NN interactions.

TL;DR: In this paper, the ideas of lattice QCD are presented, and the status for hadron phenomenology is illustrated by a few examples, with special emphasis given to recent developments allowing for an exact implementation of chiral symmetry on the lattice.

TL;DR: The perturbative chiral quark model (PCQM) as discussed by the authors is based on an effective Lagrangian, where baryons are described by relativistic valence quarks and a perturbation cloud of Goldstone bosons as required by chiral symmetry.

TL;DR: In this paper, the problem of establishing a chiral effective field theory in nuclear matter with explicit pion fields and in the presence of external sources has been tackled and the standard power counting rules for the calculation of in-medium pion properties if the residual nucleon energies are of the order of the pion mass are derived.