Quark Dynamics And Constituent Masses In Heavy Quark Systems
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Quark Dynamics and Constituent Masses in Heavy Quark Systems
QCD is considered as the theory for the description of strong interaction between quark and gluons. Due to the nature of the gauge field, perturbative techniques cannot be applied to study long distance physics where some of the most important phenomena, like Dynamical Chiral Symmetry Breaking (DCSB) and quark and gluon confinement is realized. QCD's Dyson-Schwinger equations (DSE) framework and the Maris-Tandy effective kernel, containing phenomenology at large distance, have been successfully used to study light quark meson properties. Our goal here is to extend its use and study heavy quark mesons via calculated masses and electroweak decay constants. Differences in light-heavy and heavy-heavy quark systems are investigated. We explore the role of the infrared part of the effective kernel with increasing quark mass. Deviations from a constituent-like behavior for the heavy quark propagator were investigated within this framework. Some of these results might be related to Brodsky and Shrock's suggestion of a universal maximum wavelength of quarks and gluons in hadrons.
Quarks, Leptons, and Their Constituents
Author: Antonino Zichichi
language: en
Publisher: Springer Science & Business Media
Release Date: 2012-12-06
From 5 to 15 August 1984, a group of 79 physicists from 61 laboratories in 26 countries met in Erice for the 22nd Course of the International School of Subnuclear Physics. The countries represented were Austria, Belgium, Brazil, Bulgaria, Canada, People's Republic of China, Denmark, the Federal Republic of Germany, France, Greece, Hungary, Iran, Israel, Italy, Japan, Korea, Malaysia, Mexico, the Netherlands, Pakistan, Poland, Sweden, Switzerland, Turkey, the United Kingdom, the United States of America. The School was sponsored by the Italian Ministry of Public Education (MPI), the Italian Ministry of Scientific and Technologi cal Research (MRST), the Regional Sicilian Government (ERS), and the Weizmann Institute of Science. The programme of the School was devoted to a review of the most significant results in theoretical and experimental research work on the interactions between what we believe today are the point like constituents of the world: quarks and leptons. It should however not be forgotten that many problems are still to be understood: especially in the forefront of the correla tion between quarks and leptons. This game started in 1966 with the proposal for "leptonic quarks" and went on with "preons" and "rishons" just to quote the most famous attempts to unify these two worlds.
Concepts and Trends in Particle Physics
Author: Heimo Latal
language: en
Publisher: Springer Science & Business Media
Release Date: 2012-12-06
Twenty-five years of Schladming Winter School 1. The Start Twenty-five years ago P. Urban had the idea of organizing a winter school in the Austrian mountains. The very concept of a school was not new: to bring physicists together in an environment which differs totally from the daily world of institutes and laboratories, to contrast hard classroom work in lectures by distinguished speakers with a relaxed atmosphere, to provide opportunities for entering newly developing fields and exchanging ideas, all this had already resulted in a few summer schools in southern Europe and the US. The idea of combining physics with skiing rather than swimming was, however, new. After some sampling by a few younger members of Ur ban's group, Schladming was selected as an appropriate place. At that time skiing was not very much developed here; there were few lifts, but a road to Hochwurzen and a regular bus service opened at least one longer track. The first meeting took place in a classroom of the local school, w here some 40 participants were squeezed into benches designed for children. In the next year we moved into the dining hall of a small inn, which does not exist any more (an attempt to serve beer during the lectures was stopped by the orga nizing committee). Only in later years did we find a permanent home here in the Stadtsaal.