Download or read book Chiral Symmetry and Pentaquarks written by Dmitri Diakonov and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Spontaneous chiral symmetry breaking, mesons and baryons are illustrated in the language of the Dirac theory. Various forces acting between quarks inside baryons are discussed. I explain why the naive quark models typically overestimate pentaquark masses by some 500 MeV and why in the fully relativistic approach to baryons pentaquarks turn out to be light. I discuss briefly why it can be easier to produce pentaquarks at low than at high energies.
Download or read book Stable Pentaquarks from Strange Chiral Multiplets written by and published by . This book was released on 2004 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assumption of strong diquark correlations in the QCD spectrum suggests flavor multiplets of hadrons that are degenerate in the chiral limit. Generally it would be unnatural for there to be degeneracy in the hadron spectrum that is not protected by a QCD symmetry. Here we show--for pentaquarks constructed from diquarks--that these degeneracies can be naturally protected by the full chiral symmetry of QCD. The resulting chiral multiplet structure recovers the ideally-mixed pentaquark mass spectrum of the diquark model, and interestingly, requires that the axial couplings of the pentaquarks to states outside the degenerate multiplets vanish in the chiral limit. This result suggests that if these hadrons exist, they are stable in the chiral limit and therefore have widths that scale as the fourth power of the kaon mass over the chiral symmetry breaking scale. Natural-size widths are of order a few MeV.
Download or read book A Review of Pentaquark Calculations on the Lattice written by Nilmani Mathur and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We review lattice calculations of pentaquarks and discuss issues pertaining to interpolation fields, distinguishing the signal of pentaquarks from those of the KN scattering states, chiral symmetry, and ghost state contaminations.
Download or read book Chiral Symmetry In Hadrons And Nuclei Proceedings Of The Seventh International Symposium written by Li-sheng Geng and published by World Scientific. This book was released on 2014-10-03 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume collected papers presented at a recent symposium on Chiral Symmetry in Hadrons and Nuclei — the seventh in a series of international symposia — with an aim of providing a platform for discussions among the experts and an overview of the present status in the hadron and nuclear physics related to the chiral symmetry.The recent past years have seen a remarkable progress towards a unified description of nonperturbative strong interaction phenomena based on the fundamental theory of the strong interaction, Quantum ChromoDynamics, and Effective Field Theories. The topics discussed in these proceedings include: chiral and heavy-quark spin symmetry; chiral dynamics of few-body hadron systems; chiral symmetry and hadrons in a nuclear medium; chiral dynamics in nucleon-nucleon interaction and atomic nuclei; chiral symmetry in rotating nuclei; hadron structure and interactions; exotic hadrons, heavy flavor hadrons and nuclei; mesonic atoms and nuclei.
Download or read book International Workshop on Chiral Symmetry in Hadrons and Nuclei written by Juan M. Nieves and published by American Institute of Physics. This book was released on 2011-01-25 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiral symmetry, a basic symmetry of the strong interaction and thus of QCD, plays a major role in low energy hadron physics. This workshop highlighted its importance for the understanding of hadron properties, hadron matter and recent precise lattice and experimental results. Besides, heavy quark physics was also addressed.
Download or read book Unification and Supersymmetry written by Rabindra N. Mohapatra and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: The theoretical understanding of elementary particle interactions has under gone a revolutionary change during the past one and a half decades. The spontaneously broken gauge theories, which in the 1970s emerged as a prime candidate for the description of electro-weak (as weIl as strong) interactions, have been confirmed by the discovery of neutral weak currents as weIl as the w- and Z-bosons. We now have a field theory of electro-weak interactions at energy scales below 100 GeV-the Glashow-Weinberg-Salam theory. It is a renormalizable theory which enables us to do calculations without en countering unnecessary divergences. The burning question now is: Wh at lies ahead at the next level of unification? As we head into the era of supercolliders and ultrahigh energy machines to answer this question, many ap, pealing possi bilities exist: left-right symmetry, technicolor, compositeness, grand unifica ti on, supersymmetry, supergravity, Kaluza-Klein models, and most recently superstrings that even unify gravity along with other interactions. Experi ments will decide if any one or any combination of these is to be relevant in the description of physics at the higher energies. As an outcome of our con fidence in the possible scenerios for elementary particle physics, we have seen our understanding of the early uni verse improve significantly.
Download or read book Broken Chiral Symmetry and the Structure of Hadrons written by William Leonard Spence and published by . This book was released on 1982 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pentaquark04 Proceedings Of The International Workshop written by Atsushi Hosaka and published by World Scientific. This book was released on 2005-05-06 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers collected in this book represent an exciting contribution to the growing body of experimental and theoretical research into exotic hadrons. The prime focus of the volume is the latest work on pentaquark baryons.The in-depth experimental reports cover both positive and negative evidence for the existence of various combinations of particles, and photo-electro production, hadronic production and high-energy processes are discussed in detail.Important theoretical areas of current interest are considered, including chiral solitons, constituent quarks, the QCD sum rule, lattice QCD, production reactions, and the determination of spin and parity. The volume features the work of two pioneering theorists, H Lipkin and D Diakonov, among the comprehensive coverage of the latest theoretical ideas in the field.The proceedings have been selected for coverage in:• Index to Scientific & Technical Proceedings® (ISTP® / ISI Proceedings)• Index to Scientific & Technical Proceedings (ISTP CDROM version / ISI Proceedings)• CC Proceedings — Engineering & Physical Sciences
Download or read book Chiral Soliton Models for Baryons written by Herbert Weigel and published by Springer Science & Business Media. This book was released on 2007-12-07 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise research monograph introduces and reviews the concept of chiral soliton models for baryons. In these models, baryons emerge as (topological) defects of the chiral field. The many applications shed light on a number of bayron properties, ranging from static properties via nuclear resonances to even heavy ion collisions. This volume also features a number of appendices to help nonspecialist readers to follow in more detail some of the calculations in the main text.
Download or read book Excited D sub S and Pentaquarks in Chiral Perturbation Theory written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I present results of a heavy hadron chiral perturbation theory analysis of the decays and masses of the recently discovered excited charm mesons. The present data on the electromagnetic branching ratios are consistent with heavy quark symmetry predictions and disfavor a molecular interpretation of these states. I also discuss model independent predictions for the strong decays of pentaquarks in the 10-bar representation of SU(3) which can be used to constrain the angular momentum and parity quantum numbers of these states.
Download or read book Chiral Symmetry in Hadrons and Nuclei written by Jie Meng and published by Mathematical Soc of Japan. This book was released on 2014-10-03 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume collected papers presented at a recent symposium on Chiral Symmetry in Hadrons and Nuclei -- the seventh in a series of international symposia -- with an aim of providing a platform for discussions among the experts and an overview of the present status in the hadron and nuclear physics related to the chiral symmetry. The recent past years have seen a remarkable progress towards a unified description of nonperturbative strong interaction phenomena based on the fundamental theory of the strong interaction, Quantum ChromoDynamics, and Effective Field Theories. The topics discussed in these proceedings include: chiral and heavy-quark spin symmetry; chiral dynamics of few-body hadron systems; chiral symmetry and hadrons in a nuclear medium; chiral dynamics in nucleon-nucleon interaction and atomic nuclei; chiral symmetry in rotating nuclei; hadron structure and interactions; exotic hadrons, heavy flavor hadrons and nuclei; mesonic atoms and nuclei.
Download or read book International Workshop on Chiral Symmetry in Hadrons and Nuclei written by Juan Miguel Nieves and published by . This book was released on 2010 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral symmetry and Strange Four quark Matrix Elements written by Xiangdong Ji and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral Symmetry and Scattering in the Covariant Spectator Theory written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ?-? scattering amplitude calculated with a model for the quark-antiquark interaction in the framework of the Covariant Spectator Theory (CST) is shown to satisfy the Adler zero constraint imposed by chiral symmetry. The CST formalism is established in Minkowski space and our calculations are performed in momentum space. We prove that the axial-vector Ward-Takahashi identity is satisfied by our model. Then we show that, similarly to what happens within the Bethe-Salpeter formalism, application of the axial-vector Ward Takahashi identity to the CST ?-? scattering amplitude allows us to sum the intermediate quark-quark interactions to all orders. Thus, the Adler self-consistency zero for ?-? scattering in the chiral limit emerges as the result for this sum.
Download or read book Proceedings of the International Workshop on Chiral Symmetry in Hadron and Nuclear Physics CHIRAL07 Osaka University 13 16 November 2007 written by International Workshop on Chiral Symmetry in Hadron and Nuclear Physics and published by . This book was released on 2008 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral Dynamics written by Benjamin W. Lee and published by Gordon & Breach Science Publishers. This book was released on 1972 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chiral Dynamics Theory and Experiment written by Aron Bernstein and published by Springer. This book was released on 1998-07-20 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon Rich Compounds are defined here as carbon skeletons with a carbon to hydrogen ratio of 1:(=
