The Ix International Conference On Quark Confinement And The Hadron Spectrum Qchs Ix

This conference is the ninth in a biennial series dedicated to QCD and strong-interaction dynamics. Plenary talks cover both experiments, including the latest LHC results, and the most recent theoretical developments on hadron spectroscopy, lattice calculations, confinement and deconfinement. Parallel sessions are devoted to: Vacuum structure and confinement, light and heavy quarks, deconfinement, QCD and new Physics as well as nuclear and astroparticle Physics.

The 20-year-old problem of the confinement and the resulting spectrum of the bound states is central to quantum chromodynamics (QCD). Many approaches have been tried starting from different points of view: the potential theory, the Bethe-Salpeter equation, string and flux tube models, bag models, vacuum structure, current algebra, lattice theory, and numerical simulations. Phenomenological assumptions and first-principle theoretical results or indications have been combined. Many partial successes have been attained, but a unified and comprehensive treatment is still lacking.In recent years, new attention has been given to the problem, both in terms of theoretical developments and for the purpose of evaluating the spectrum and other properties of the particles. In particular, attention has been focussed on areas like numerical simulations, the derivation of the potential, the use of the Bethe-Salpeter equation, the connection between the potential and the chiral symmetry approach.This workshop was an opportunity for a synthesis and a comparison of the different points of view.

This book provides an update on our understanding of strong interaction, with theoretical and experimental highlights included. It is divided into five sections. The first section is devoted to the investigations into and the latest results on the mechanism of quark confinement. The second and third sections focus respectively on light and heavy quarks (effective field theories, Schwinger–Dyson approach and lattice QCD results). The fourth section deals with the deconfinement mechanism and quark–gluon plasma formation signals. The last section presents highlights of experiments, new physics beyond QCD, and nonperturbative approaches in other theories (strings and SUSY) that may be useful in QCD. Contents:Vortices, Confinement and Higgs Fields (R Bertle & M Faber)Hadronic Signature of Quark–Gluon Plasma (J Rafelski & J Letessier)Topology of Center Vortices (H Reinhardt)The Nonperturbative Quark-Gluon Vertex (J Skullerud et al.)Equivalence in Minkowski and Euclidean Field Theories (K M Maung et al.)Criterium for the Index Theorem on the Lattice (P Bicudo)Isospin Breaking in the Goldberger–Treiman Discrepancies (J L Goity & J Saez)Quantum Field Theory Approach to the Vacuum Replica in QCD (A V Nefediev & J E F T Ribeiro)Charm and Bottom Quark Masses from QCD Moment Sum Rules (M Eidemüller)Dilepton Production in Heavy-Ion Collisions: A Probe of Deconfinement (E Scomparin)Deuteron Photodisintegration at High Energy (F Ronchetti)Semianalytical Bounds on Spinless–Salpeter Energy Levels (R L Hall et al.)String Breaking and Monopoles in the 3D Abelian Higgs Model (M N Chernodub et al.)and other papers Readership: Researchers in high-energy, particle, theoretical, accelerator and experimental physics. Keywords:Gauge Field Theories;Models beyond the Standard Model;Chiral Symmetries;Perturbative and Nonperturbative QCD;Deconfinement;Hadrons

This book addresses the confinement problem, which concerns the behavior of non-abelian gauge theories, and the force which is mediated by gauge fields, at large distances. The word “confinement” in the context of hadronic physics originally referred to the fact that quarks and gluons appear to be trapped inside mesons and baryons, from which they cannot escape. There are other, and possibly deeper meanings that can be attached to the term, and these will be explored in this book. Although the confinement problem is far from solved, much is now known about the general features of the confining force, and there are a number of very well motivated theories of confinement which are under active investigation. This volume gives a both pedagogical and concise introduction and overview of the main ideas in this field, their attractive features, and, as appropriate, their shortcomings. This second edition summarizes some of the developments in this area which have occurred since the first edition of this book appeared in 2011. These include new results in the caloron/dyon picture of confinement, in functional approaches, and in studies of the Yang-Mills vacuum wave functional. Special attention, in two new chapters, is given to recent numerical investigations of the center vortex theory, and to the varieties of confinement which may exist in gauge-Higgs theories. Reviews of the first edition: “This is indeed a very good book. I enjoyed reading it and... I learned a lot from it.... It is definitely a research book that provides readers with a guide to the most updated confinement models.” (Giuseppe Nardelli, Mathematical Reviews, Issue 2012 d) “The book is beautifully produced with special emphasis on the relevance of center symmetry and lattice formulation as well as an introduction to current research on confinement.” (Paninjukunnath Achuthan, Zentralblatt MATH, Vol. 1217, 2011)

The QNP series of international conferences on Quarks and Nuclear Physics is by now a well established and highly respected forum where the most recent developments in the field are discussed and communicated. QNP 2006 is the forth edition of this biennial meeting. Selected and refereed original contributions of QNP 2006 have been published in The European Physical Journal A - Hadrons and Nuclei (EPJ A), while the present proceedings book, in addition to reprinting the articles published in EPJ A, further includes all other contributions selected and accepted by the organizing committee for publication and archiving.