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Exploring Hadron Masses In Lattice Qcd With Light Quarks And An Improved Fermion Action
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Book Synopsis Exploring Hadron Masses in Lattice QCD with Light Quarks and an Improved Fermion Action by : Ph. de Forcrand
Download or read book Exploring Hadron Masses in Lattice QCD with Light Quarks and an Improved Fermion Action written by Ph. de Forcrand and published by . This book was released on 1987 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Exploration of the Role of Diquarks in Hadrons Using Lattice QCD by : Patrick S. Varilly
Download or read book Exploration of the Role of Diquarks in Hadrons Using Lattice QCD written by Patrick S. Varilly and published by . This book was released on 2006 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: We perform a number of measurements relevant to nuclear and particle physics by using the tools of lattice QCD. We verify our lattice calculations by reproducing published meson masses. We then study the light quark distribution in a meson with one heavy quark. After improving our methods in the meson case, we conclude by looking at the correlation between the two light quarks in a baryon. We find evidence for these quarks binding into spatially extended diquarks.
Book Synopsis Hadronic Physics from Lattice QCD by : Anthony M. Green
Download or read book Hadronic Physics from Lattice QCD written by Anthony M. Green and published by World Scientific. This book was released on 2004 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Particle and nuclear physicists frequently take results from Lattice QCD at their face value without probing into their reliability or sophistication. This attitude usually stems from a lack of knowledge of the field. The aim of the present volume is to rectify this by introducing in an elementary way several topics, which we believe are appropriate for, and of possible interest to, both particle and nuclear physicists who are non-experts in the field.
Book Synopsis Heavy Quark Physics on the Lattice with Improved Nonrelativistic Actions by : Stefan Meinel
Download or read book Heavy Quark Physics on the Lattice with Improved Nonrelativistic Actions written by Stefan Meinel and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hadrons containing heavy quarks, in particular b quarks, play an important role in high energy physics. Measurements of their electroweak interactions are used to test the Standard Model and search for new physics. For the comparison of experimental results with theoretical predictions, nonperturbative calculations of hadronic matrix elements within the theory of quantum chromodymanics are required. Such calculations can be performed from first principles by formulating QCD on a Euclidean spacetime grid and computing the path integral numerically. Including b quarks in lattice QCD calculations requires special techniques as the lattice spacing in present computations usually can not be chosen fine enough to resolve their Compton wavelength. In this work, improved nonrelativistic lattice actions for heavy quarks are used to perform calculations of the bottom hadron mass spectrum and of form factors for heavy-to-light decays. In heavy-to-light decays, additional complications arise at high recoil, when the momentum of the light meson reaches a magnitude comparable to the cutoff imposed by the lattice. Discretisation errors at high recoil can be reduced by working in a frame of reference where the heavy and light mesons move in opposite directions. Using a formalism referred to as moving nonrelativistic QCD (mNRQCD), the nonrelativistic expansion for the heavy quark can be performed around a state with an arbitrary velocity. This dissertation begins with a review of the fundamentals of lattice QCD. Then, the construction of effective Lagrangians for heavy quarks in the continuum and on the lattice is discussed in detail. A highly improved lattice mNRQCD action is derived and its effectiveness is demonstrated by nonperturbative tests involving both heavy-heavy and heavy-light mesons at several frame velocities. This mNRQCD action is then used in combination with a staggered action for the light quarks to calculate hadronic matrix elements relevant for rare B decays, including B --> K* gamma and B --> K l l. A major contribution to the uncertainty of the results also comes from statistical errors. The effectiveness of random-wall sources to reduce these errors is studied. As another application of a nonrelativistic heavy quark action, the spectrum of bottomonium is calculated and masses of several bottom baryons are predicted. In these computations, the light quarks are implemented with a domain wall action.
Book Synopsis Hadron Masses from Light Quarks and Improved Fermionic Actions by : R. Sommer
Download or read book Hadron Masses from Light Quarks and Improved Fermionic Actions written by R. Sommer and published by . This book was released on 1987 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Light Hadron Spectrum, Quark Masses and Meson Decay Constants from Lattice QCD with O(a)-improved Dynamical Wilson Fermions by : Derek John Hepburn
Download or read book Light Hadron Spectrum, Quark Masses and Meson Decay Constants from Lattice QCD with O(a)-improved Dynamical Wilson Fermions written by Derek John Hepburn and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Light Hadron Spectrum, Quark Masses and Meson Decay Constants from Lattice QCD with Wilson Fermions by : D. J. Hepburn
Download or read book Light Hadron Spectrum, Quark Masses and Meson Decay Constants from Lattice QCD with Wilson Fermions written by D. J. Hepburn and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hadron Mass Estimates in the Lattice Gauge Theory by :
Download or read book Hadron Mass Estimates in the Lattice Gauge Theory written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Some estimates for the hadron masses in lattice QCD are presented in the approximation of neglecting dynamic fermion loops. Both light and heavy quark systems are considered and their dependence on the coupling constant and the quark mass is studied. Some results for the decay amplitudes are also given. We discuss how the eta prime mass can be computed to lowest order in n/sub f/, the number of dynamic fermion flavors.
Book Synopsis Hadron Masses From Novel Fat-Link Fermion Actions by :
Download or read book Hadron Masses From Novel Fat-Link Fermion Actions written by and published by . This book was released on 2001 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hadron mass spectrum is calculated in lattice QCD using a novel fat-link clover fermion action in which only the irrelevant operators in the fermion action are constructed using smeared links. The simulations are performed on a 163 x 32 lattice with a lattice spacing of a=0.125 fm. We compare actions with n=4 and 12 smearing sweeps with a smearing fraction of 0.7. The n=4 Fat-Link Irrelevant Clover (FLIC) action provides scaling which is superior to mean-field improvement, and offers advantages over nonperturbative 0(a) improvement, including a reduced exceptional configuration problem.
Book Synopsis Particle Physics Reference Library by : Herwig Schopper
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
Book Synopsis Light Hadron Masses with a Tadpole-improved Next-nearest-neighbour Lattice Fermion Action by : Fiebig, H. R
Download or read book Light Hadron Masses with a Tadpole-improved Next-nearest-neighbour Lattice Fermion Action written by Fiebig, H. R and published by . This book was released on 1996 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hadron Properties with FLIC Fermions by :
Download or read book Hadron Properties with FLIC Fermions written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fat-Link Irrelevant Clover (FLIC) fermion action provides a new form of nonperturbative O(a)-improvement in lattice fermion actions offering near continuum results at finite lattice spacing. It provides computationally inexpensive access to the light quark mass regime of QCD where chiral nonanalytic behavior associated with Goldstone bosons is revealed. The motivation and formulation of FLIC fermions, its excellent scaling properties and its low-lying hadron mass phenomenology are presented.
Book Synopsis Improvement of Wilson Fermions and Twisted Mass Lattice QCD by : Jackson M. S. Wu
Download or read book Improvement of Wilson Fermions and Twisted Mass Lattice QCD written by Jackson M. S. Wu and published by . This book was released on 2005 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Hadron Structure with Light Dynamical Quarks by :
Download or read book Hadron Structure with Light Dynamical Quarks written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Generalized parton distributions encompass a wealth of information concerning the three dimensional quark and gluon structure of the nucleon, and thus provide an ideal focus for the study of hadron structure using lattice QCD. The special limits corresponding to form factors and parton distributions are well explored experimentally, providing clear tests of lattice calculations, and the lack of experimental data for more general cases provides opportunities for genuine predictions and for guiding experiment. We present results from hybrid calculations with improved staggered (Asqtad) sea quarks and domain wall valence quarks at pion masses down to 350 MeV.
Download or read book Multiquark Hadrons written by Ahmed Ali and published by Cambridge University Press. This book was released on 2019-04-25 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive summary of current research into multiquark hadrons, describing them in terms of constituent quarks, gluons and compact diquarks.
Book Synopsis Quark Confinement And The Hadron Spectrum Iv by : Wolfgang Lucha
Download or read book Quark Confinement And The Hadron Spectrum Iv written by Wolfgang Lucha and published by World Scientific. This book was released on 2002-02-27 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum chromodynamics is generally accepted to be the quantum field theory which describes the strong interactions in elementary particle physics. However, the question of the mechanism responsible for the “confinement” of the color degrees of freedom of quarks and gluons into hadrons still ranks as one of the most interesting open problems in physics.This proceedings volume summarizes the state of the art in this area of research. Mathematically inclined readers will find the articles based on monopoles, vortices, and topology most interesting. Meanwhile, lattice calculations can be performed for many important physical quantities. Their results can be used as guidelines for developing models of quark confinement. These models are indispensable for theoretical physicists performing calculations with the Bethe-Salpeter equation, Dyson-Schwinger equations, effective Hamiltonians, and potential models. The cross-fertilization of all these subfields of research becomes evident from the articles in this book. A few experimental papers are also included.
Book Synopsis Lattice Gauge Theory - QCD from Quarks to Hadrons by :
Download or read book Lattice Gauge Theory - QCD from Quarks to Hadrons written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Lattice Gauge Theory enables an ab initio study of the low-energy properties of Quantum Chromodynamics, the theory of the strong interaction. The author begins these lectures by presenting the lattice formulation of QCD, and then outline the benchmark calculation of lattice QCD, the light-hadron spectrum. He then proceeds to explore the predictive power of lattice QCD, in particular as it pertains to hadronic physics. He discusses the spectrum of glueballs, exotics and excited states, before investigating the study of form factors and structure functions. He concludes by showing how lattice QCD can be used to study multi-hadron systems, and in particular provide insight into the nucleon-nucleon interaction.