Download or read book Heavy Quark Symmetry and the Electromagnetic Decays of Excited Charmed Strange Mesons written by and published by . This book was released on 2004 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy-hadron chiral perturbation theory (HH[chi]PT) is applied to the decays of the even-parity charmed strange mesons, D{sub s0}(2317) and D{sub s1}(2460). Heavy-quark spin symmetry predicts the branching fractions for the three electromagnetic decays of these states to the ground states D{sub s} and D{sub s}* in terms of a single parameter. The resulting predictions for two of the branching fractions are significantly higher than current upper limits from the CLEO experiment. Leading corrections to the branching ratios from chiral loop diagrams and spin-symmetry violating operators in the HH[chi]PT Lagrangian can naturally account for this discrepancy. Finally the proposal that the D{sub s0}(2317) (D{sub s1}(2460)) is a hadronic bound state of a D (D*) meson and a kaon is considered. Leading order predictions for electromagnetic branching ratios in this molecular scenario are in very poor agreement with existing data.
Download or read book Heavy Quark Symmetry in the Soft Collinear Effective Theory written by Gautam Mantry and published by . This book was released on 2005 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: We study strong interaction effects in nonleptonic decays of ... mesons with energetic particles in the final state. An introduction to Soft Collinear Effective Theory (SCET), the appropriate effective field theory of QCD for such decays, is given. We focus on decays of the type ... where M is a light energetic meson of energy E. The SCET formulates the problem as an expansion in powers of where Q [approx.] ... A factorization theorem is proven at leading order that separates the physics of the scales ... In addition, the factorization theorem decouples energetic degrees of freedom associated with the light meson allowing us to derive heavy quark symmetry relations between the ... type amplitudes. A new mechanism for the generation of non-perturbative strong phases is shown within the framework of factorization. Heavy quark symmetry relations are shown to apply for these strong phases as well. Furthermore, the strong phases for certain light mesons in the final state are shown to be universal. The analysis is extended to ... type decays with isosinglet light mesons and excited charmed mesons in the final state respectively. A host of other phenomenological relations are derived and found to be in good agreement with available data.
Download or read book Radiative Transitions in Heavy Mesons in a Relativistic Quark Model written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The radiative decays of D*, B*, and other excited heavy mesons are analyzed in a relativistic quark model for the light degrees of freedom and in the limit of heavy quark spin-flavor symmetry. The analysis of strong decays carried out in the corresponding chiral quark model is used to calculate the strong decays and determine the branching ratios of the radiative D* decays. Consistency with the observed branching ratios requires the inclusion of the heavy quark component of the electromagnetic current and the introduction of an anomalous magnetic moment for the light quark. It is observed that not only D, but also B meson transitions within a heavy quark spin multiplet are affected by the presence of the heavy quark current.
Download or read book Nuclear Physics written by National Research Council and published by National Academies Press. This book was released on 1999-03-31 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dramatic progress has been made in all branches of physics since the National Research Council's 1986 decadal survey of the field. The Physics in a New Era series explores these advances and looks ahead to future goals. The series includes assessments of the major subfields and reports on several smaller subfields, and preparation has begun on an overview volume on the unity of physics, its relationships to other fields, and its contributions to national needs. Nuclear Physics is the latest volume of the series. The book describes current activity in understanding nuclear structure and symmetries, the behavior of matter at extreme densities, the role of nuclear physics in astrophysics and cosmology, and the instrumentation and facilities used by the field. It makes recommendations on the resources needed for experimental and theoretical advances in the coming decade.
Download or read book Heavy Quark Physics written by Aneesh V. Manohar and published by Cambridge University Press. This book was released on 2000-03-28 with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt: A clear and original introductory 2000 text on the physics of heavy quarks, written by two world leading experts.
Download or read book Top Quark Heavy Flavor Physics And Symmetry Breaking The Proceedings Of The Xxiii International Meeting On Fundamental Physics written by Teresa Rodrigo and published by World Scientific. This book was released on 1996-03-31 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This meeting discussed the experimental results and theoretical aspects in the field of high energy physics, with special reference to the top quark observation, heavy flavor physics and symmetry-breaking mechanisms. The major topics are developed in a series of course lectures.
Download or read book Constructing Quarks written by Andrew Pickering and published by University of Chicago Press. This book was released on 1999-12 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Widely regarded as a classic in its field, Constructing Quarks recounts the history of the post-war conceptual development of elementary-particle physics. Inviting a reappraisal of the status of scientific knowledge, Andrew Pickering suggests that scientists are not mere passive observers and reporters of nature. Rather they are social beings as well as active constructors of natural phenomena who engage in both experimental and theoretical practice. "A prodigious piece of scholarship that I can heartily recommend."—Michael Riordan, New Scientist "An admirable history. . . . Detailed and so accurate."—Hugh N. Pendleton, Physics Today
Download or read book Introduction to High Energy Physics written by Donald H. Perkins and published by Cambridge University Press. This book was released on 2000-04-13 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: This highly-regarded text provides a comprehensive introduction to modern particle physics. Extensively rewritten and updated, this 4th edition includes developments in elementary particle physics, as well as its connections with cosmology and astrophysics. As in previous editions, the balance between experiment and theory is continually emphasised. The stress is on the phenomenological approach and basic theoretical concepts rather than rigorous mathematical detail. Short descriptions are given of some of the key experiments in the field, and how they have influenced our thinking. Although most of the material is presented in the context of the Standard Model of quarks and leptons, the shortcomings of this model and new physics beyond its compass (such as supersymmetry, neutrino mass and oscillations, GUTs and superstrings) are also discussed. The text includes many problems and a detailed and annotated further reading list.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heavy Quark Symmetry and D1 2420 D Pi Decay written by and published by . This book was released on 1992 with total page 1553 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy-quark symmetry relates the D-wave amplitude for D1(2420) --> D*pi to the amplitudes for the decays D2*(2460) --> D*pi and D2*(2460) --> D pi. We discuss the extraction of the S and D partial wave amplitudes for D1 --> D*pi and their significance as tests of the applicability of heavy-quark symmetry for charm quarks.
Download or read book Mesons and Quarks written by A. B. Santra and published by Alpha Science Int'l Ltd.. This book was released on 2004 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This monograph "Mesons and Quarks" includes a wide range of topics in the frontier areas of research in the overlapping field of nuclear and particle physics. It discusses various aspects of Quantum Chromodynamics (QCD) at different regimes of energy and density."--BOOK JACKET.
Download or read book Spin orbit Inversion of Excited Heavy Quark Mesons written by and published by . This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The mesonic heavy quark spin multiplets with s{sub l}{sup {pi}{sub l}}=1/2 and (3/2) are expected to be the lowest-lying excitations about the pseudoscalar and vector ground states with s{sub l}{sup {pi}{sub l}}=1/2−. The author shows that for charm and bottom these multiplets are probably inverted, with the 2+ and 1+ states with s{sub l}{sup {pi}{sup l}}=(3/2)+ about 150 MeV below the 1+ and 0+ states with s{sub l}{sup {pi}{sub l}}=1/2+. If verified, such an inversion would both support the expectation that confinement has no dynamical spin-dependence and indicate that heavy and light quark systems may be characterized by the same effective low-energy degrees of freedom. As an important byproduct, this work establishes the dynamics of the strange quark as a critical link between heavy- and light-quark hadrons, justifying efforts toward a much more complete experimental and theoretical understanding of strange mesons and baryons and of strangeonia.
Download or read book Particle Physics Reference Library written by Herwig Schopper and published by Springer Nature. This book was released on 2020 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first open access volume of the handbook series contains articles on the standard model of particle physics, both from the theoretical and experimental perspective. It also covers related topics, such as heavy-ion physics, neutrino physics and searches for new physics beyond the standard model. A joint CERN-Springer initiative, the "Particle Physics Reference Library" provides revised and updated contributions based on previously published material in the well-known Landolt-Boernstein series on particle physics, accelerators and detectors (volumes 21A, B1,B2,C), which took stock of the field approximately one decade ago. Central to this new initiative is publication under full open access
Download or read book A Lattice Investigation of Heavy Quark Symmetry in Semi leptonic Decays of B Mesons written by Henning Hoeber and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Properties of Heavy Quark Jets Produced by E e Annihilation at 29 GeV written by Peter Cavanagh Rowson and published by . This book was released on 1985 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Quarks and Partons written by F. E. Close and published by . This book was released on 1979 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
