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Negative Parity Baryon Decays In The 1 Nc Expansion
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Book Synopsis Negative Parity Baryon Decays in the 1/Nc Expansion by :
Download or read book Negative Parity Baryon Decays in the 1/Nc Expansion written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The $1/N_c$ expansion of QCD provides a useful framework for phenomenological studies of both ground state and excited baryons. Here, we focus on its application to the excited baryon strong decays via emission of single pseudoscalar meson. The S- and D-wave decay amplitudes of the negative parity baryons in the $[70,1^-]$ of $SU(6)$ are analyzed to subleading order in $1/N_c$ and to first order in SU(3) symmetry breaking. In particular, the SU(3) symmetry breaking is studied in detail through SU(3) breaking decay operators and state mixing.
Book Synopsis Decays of Negative Parity Non-strange Baryons in the 1/Nc Expansion by :
Download or read book Decays of Negative Parity Non-strange Baryons in the 1/Nc Expansion written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The decays of non-strange negative parity baryons via the emission of single [pi] and [eta] mesons are analyzed in the framework of the 1/N{sub c} expansion. A basis of spin-flavor operators is established to that order, and with this basis the different partial wave decay amplitudes are obtained. The unknown effective coefficients are determined by fitting to the S- and D-wave partial widths as provided by the PDG. A full set of relations between widths that result at the leading order, i.e. order N{sub c0}, is given and tested with the data. The rather large errors of the input partial widths, that result from the often discrepant results for the resonance parameters from different analyses of the data, lead to a rather good fit at the leading order N{sub c0}. The next to leading order fit fails for that reason to pin down with satisfactory accuracy the effective sub leading effective constants.
Download or read book Excited Baryon Decays in 1 written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The decays of excited baryons are analyzed using the 1/Nc expansion of QCD. These studies are performed up to order 1/Nc, and include positive and negative parity states.
Book Synopsis Analysis of 56-plet Positive Parity Baryon Decays in the 1/Nc Expansion by :
Download or read book Analysis of 56-plet Positive Parity Baryon Decays in the 1/Nc Expansion written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The partial decay widths of positive parity baryons belonging to 56-plets of SU(6) are analyzed in the framework of the 1/Nc expansion. The channels considered are those with emission of a single pion, K or K-bar mesons, and the analysis is carried out to subleading order in 1/Nc and to first order in SU(3) symmetry breaking. The results for the multiplet [56,0+], to which the Roper resonance belongs, indicate a poor description at leading order, requiring large next to leading order corrections. For the multiplet [56,2+], the P-wave decays in the non-strange sector are well described at leading order and important SU(3) breaking corrections are necessary to describe transitions involving strangeness, on the other hand, the F-wave decays require the next to leading order corrections, which turn out to be however of natural magnitude.
Book Synopsis Decays of Non-strange Positive Parity Excited Baryons in the 1 by :
Download or read book Decays of Non-strange Positive Parity Excited Baryons in the 1 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The decays of non-strange positive parity baryons via emission of a pseudo-scalar meson are studied in the framework of the 1/Nc expansion to order 1/Nc. In particular, the pionic decays of the l=0 Roper baryons and of the l=2 baryons in the mass interval 1680-1950 MeV are analyzed using the available partial decay widths. Decay widths by emission of an eta meson are shown to be suppressed by a factor 1/Nc2 with respect to the pionic ones.
Book Synopsis The IVth International Conference on Quarks and Nuclear Physics by : Antonio Dobado
Download or read book The IVth International Conference on Quarks and Nuclear Physics written by Antonio Dobado and published by Springer Science & Business Media. This book was released on 2008-11-07 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Large Nc Qcd 2004 - Proceedings Of The Workshop by : Jose Luis Goity
Download or read book Large Nc Qcd 2004 - Proceedings Of The Workshop written by Jose Luis Goity and published by World Scientific. This book was released on 2005-08-04 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: The large Nc limit plays a fundamental role in the study of non-abelian gauge theories such as quantum chromodynamics (QCD). Since its discovery in 1974 by 't Hooft, the 1/Nc expansion has provided crucial insights into the non-perturbative aspects of gauge theories. The expansion implemented at the effective theory level is one of the fundamental tools currently in use in hadronic physics; there are important effects and relations that follow from the 1/Nc expansion, which held remarkably well in the real world with Nc= 3. The 1/Ncexpansion also plays a central role in the recently discovered connections between non-Abelian gauge and string theories, promising new ways to analyze the non-perturbative domain of gauge theories.This volume contains contributions from leading theorists and covers the recent developments in the 1/Nc expansion in QCD. The topics addressed include confinement, AdS/CFT correspondence and the string-QCD connection, topology in large Nc, lattice QCD, and a variety of applications to mesons and baryons.
Book Synopsis Global Analysis Of The Negative Parity Non-Strange Baryons In The 1/N{sub C} Expansion by :
Download or read book Global Analysis Of The Negative Parity Non-Strange Baryons In The 1/N{sub C} Expansion written by and published by . This book was released on 2014 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A global study of the negative parity non-strange baryon observables is performed in the framework of the 1/N{sub c} expansion. Masses, partial decay widths and photo-couplings are simultaneously analyzed. A main objective is to determine the composition of the spin 1/2 and 3/2 nucleon states, which come in pairs and involve two mixing angles which can be determined and tested for consistency by the mentioned observables. The issue of the assignment of those nucleon states to the broken SU(4) X O(3) mixed-symmetry multiplet is studied in detail, with the conclusion that the assignment made in the old studies based on the non-relativistic quark model is the preferred one. In addition, the analysis involves an update of the input data with respect to previous works.
Download or read book The 1/Nc Expansion in Baryons written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The 1/N_c expansion in baryons is discussed with two applications, namely baryon masses and partial decay widths. These applications provide the basic insights on the utility of the expansion.
Book Synopsis Analysis of Negative Parity Baryon Photoproduction Helicity Amplitudes in the 1 by :
Download or read book Analysis of Negative Parity Baryon Photoproduction Helicity Amplitudes in the 1 written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We study the photoproduction helicity amplitudes of negative parity baryons in the context of the 1/Nc expansion of QCD. A complete analysis to next-to-leading order is carried out. The results show sub-leading effects to be within the magnitude expected from the $1/N_c$ power counting. They also show significant deviations from the quark model, in particular the need for 2-body effects.
Book Synopsis Negative Parity 70-plet Baryon Masses in the 1 by :
Download or read book Negative Parity 70-plet Baryon Masses in the 1 written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The masses of the negative parity SU(6) 70-plet baryons are analyzed in the 1/N{sub c} expansion to order 1/N{sub c} and to first order in SU(3) breaking. At this level of precision there are twenty predictions. Among them there are the well known Gell-Mann Okubo and equal spacing relations, and four new relations involving SU(3) breaking splittings in different SU(3) multiplets. Although the breaking of SU(6) symmetry occurs at zeroth order in 1/N{sub c}, it turns out to be small. The dominant source of the breaking is the hyperfine interaction which is of order 1/N{sub c}. The spin-orbit interaction, of zeroth order in 1/N{sub c}, is entirely fixed by the splitting between the singlet states A(1405) and A(1520), and the spin-orbit puzzle is resolved by the presence of other zeroth order operators involving flavor exchange.
Book Synopsis Baryon Resonances and Their Decays in the 1/Nc Expansion by : Chandana Prasad Jayalath
Download or read book Baryon Resonances and Their Decays in the 1/Nc Expansion written by Chandana Prasad Jayalath and published by . This book was released on 2010 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis VI Latin American Symposium on Nuclear Physics and Applications by : Osvaldo Civitarese
Download or read book VI Latin American Symposium on Nuclear Physics and Applications written by Osvaldo Civitarese and published by American Institute of Physics. This book was released on 2007-03-09 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Sixth Latin American Symposium on Nuclear Applications covered the most active topics in basic nuclear physics which were grouped into four broad categories, namely, nuclear structure, nuclear reactions, subnuclear physics, and nuclear thermodynamics and dynamics. It also placed a significant emphasis on the applications of nuclear science and nuclear instrumentation to a wide range of fields of knowledge.
Book Synopsis Intersections of Particle and Nuclear Physics by : Zohreh Parsa
Download or read book Intersections of Particle and Nuclear Physics written by Zohreh Parsa and published by American Inst. of Physics. This book was released on 2004-03-09 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of this meeting, as with the seven previous conferences in this series, was to bring together particle and nuclear physicists to share scientific reports and discuss areas of research which overlap both their disciplines. Its relevance has steadily grown as the areas of overlap between particle and nuclear physics have increased. In addition, the success of the standard model has provided a common underpinning for both disciplines as well as similar fundamental goals. Indeed, Quantum Chromodynamics (QCD) has proven to be "the" theory of strong interactions. As such, it forms the basis for nuclear physics as well as high energy hadronic interactions. Topics included are: QCD spectroscopy and dynamics, relativistic heavy ions, QCD and nuclear structure, lepton-hadron and hadron-hadron scattering, heavy quark and heavy lepton physics, spin physics, nuclear and particle astrophysics, neutrinos, accelerators, facilities and detectors, as well as tests of fundamental symmetries.
Download or read book NSTAR 2005 written by Simon Capstick and published by World Scientific. This book was released on 2006 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together experts on the quark-gluon structure of matter as it applies to nucleon resonance physics. The contributions discuss the latest findings in areas such as meson production via electromagnetic and hadronic reactions, baryon resonance structure in chiral and lattice QCD approaches, and the extraction of resonance parameters from coupled-channels analysis of data.
Book Synopsis Nstar 2005 - Proceedings Of The Workshop On The Physics Of Excited Nucleons by : Simon Capstick
Download or read book Nstar 2005 - Proceedings Of The Workshop On The Physics Of Excited Nucleons written by Simon Capstick and published by World Scientific. This book was released on 2006-06-08 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume brings together experts on the quark-gluon structure of matter as it applies to nucleon resonance physics. The contributions discuss the latest findings in areas such as meson production via electromagnetic and hadronic reactions, baryon resonance structure in chiral and lattice QCD approaches, and the extraction of resonance parameters from coupled-channels analysis of data.
Book Synopsis Proceedings of the Conference on Continuous Advances in QCD 2006 by : Marco M. Peloso
Download or read book Proceedings of the Conference on Continuous Advances in QCD 2006 written by Marco M. Peloso and published by World Scientific. This book was released on 2007 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volume contains the proceedings of the workshop Continuous Advances in QCD 2006, hosted by the Wiliam I Fine Theoretical Physics Institute. This biennial workshop was the seventh meeting of the series, held at the University of Minnesota since 1994. The workshop gathered together about 110 scientists (a record number for the event), including most of the leading experts in quantum chromodynamics and non-Abelian gauge theories in general.
