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Highly Excited And Exotic Meson Spectroscopy From Lattice Qcd
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Book Synopsis Highly Excited and Exotic Meson Spectroscopy from Lattice QCD. by :
Download or read book Highly Excited and Exotic Meson Spectroscopy from Lattice QCD. written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I will discuss recent progress in extracting highly excited and exotic meson spectra using lattice QCD. New results in the light meson sector will be presented, where a combination of techniques have enabled us to confidently identify the spin of extracted states. Highlights include many states with exotic quantum numbers and, for the first time in a lattice QCD calculation, spin-four states. I will conclude with comments on future prospects.
Book Synopsis Highly Excited and Exotic Meson Spectrum from Dynamical Lattice QCD. by :
Download or read book Highly Excited and Exotic Meson Spectrum from Dynamical Lattice QCD. written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a new quark-field construction algorithm and a large variational basis of operators, we extract a highly excited isovector meson spectrum on dynamical anisotropic lattices. We show how carefully constructed operators can be used to identify the continuum spin of extracted states. This method allows us to extract, with confidence, excited states, states of high spin and states with exotic quantum numbers, including, for the first time, spin-four states.
Book Synopsis Exotic and Excited-state Meson Spectroscopy and Radiative Transitions from Lattice QCD. by :
Download or read book Exotic and Excited-state Meson Spectroscopy and Radiative Transitions from Lattice QCD. written by and published by . This book was released on 2010 with total page 1512 pages. Available in PDF, EPUB and Kindle. Book excerpt: We discuss recent progress in extracting the excited meson spectrum and radiative transition form factors using lattice QCD. We mention results in the charmonium sector, including the first lattice QCD calculation of radiative transition rates involving excited charmonium states, highlighting results for high spin and exotic states. We present recent results on a highly excited isovector meson spectrum from dynamical anisotropic lattices. Using carefully constructed operators we show how the continuum spin of extracted states can be reliably identified and confidently extract excited states, states with exotic quantum numbers and states of high spin. This spectrum includes the first spin-four state extracted from lattice QCD. We conclude with some comments on future prospects.
Book Synopsis Excited Light Meson Spectroscopy from Lattice QCD. by :
Download or read book Excited Light Meson Spectroscopy from Lattice QCD. written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: I report on recent progress in calculating excited meson spectra using lattice QCD, emphasizing results and phenomenology. With novel techniques we can now extract extensive spectra of excited mesons with high statistical precision, including spin-four states and those with exotic quantum numbers. As well as isovector meson spectra, I will present new calculations of the spectrum of excited light isoscalar mesons, something that has up to now been a challenge for lattice QCD. I show determinations of the flavor content of these mesons, including the eta-eta' mixing angle, providing a window on annihilation dynamics in QCD. I will also discuss recent work on using lattice QCD to map out the energy-dependent phase shift in pi-pi scattering and future applications of the methodology to the study of resonances and decays.
Book Synopsis Toward the Excited Meson Spectrum of Dynamical QCD. by :
Download or read book Toward the Excited Meson Spectrum of Dynamical QCD. written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a detailed description of the extraction of the highly excited isovector meson spectrum on dynamical anisotropic lattices using a new quark-field construction algorithm and a large variational basis of operators. With careful operator construction, the combination of these techniques is used to identify the continuum spin of extracted states reliably, overcoming the reduced rotational symmetry of the cubic lattice. Excited states, states with exotic quantum numbers (0+-, 1-+ and 2+- ) and states of high spin are resolved, including, for the first time in a lattice QCD calculation, spin-four states. The determinations of the spectrum of isovector mesons and kaons are performed on dynamical lattices with two volumes and with pion masses down to ~ 400 MeV, with statistical precision typically at or below 1% even for highly excited states.
Book Synopsis Isoscalar Meson Spectroscopy from Lattice QCD. by :
Download or read book Isoscalar Meson Spectroscopy from Lattice QCD. written by and published by . This book was released on 2011 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: We extract to high statistical precision an excited spectrum of single-particle isoscalar mesons using lattice QCD, including states of high spin and, for the first time, light exotic JPC isoscalars. The use of a novel quark field construction has enabled us to overcome the long-standing challenge of efficiently including quark-annihilation contributions. Hidden-flavor mixing angles are extracted and while most states are found to be close to ideally flavor mixed, there are examples of large mixing in the pseudoscalar and axial sectors in line with experiment. The exotic JPC isoscalar states appear at a mass scale comparable to the exotic isovector states.
Book Synopsis Toward the Excited Isoscalar Meson Spectrum from Lattice QCD. by :
Download or read book Toward the Excited Isoscalar Meson Spectrum from Lattice QCD. written by and published by . This book was released on 2013 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report on the extraction of an excited spectrum of isoscalar mesons using lattice QCD. Calculations on several lattice volumes are performed with a range of light quark masses corresponding to pion masses down to about ~400 MeV. The distillation method enables us to evaluate the required disconnected contributions with high statistical precision for a large number of meson interpolating fields. We find relatively little mixing between light and strange in most JPC channels; one notable exception is the pseudoscalar sector where the approximate SU(3)F octet, singlet structure of the [eta], [eta]' is reproduced. We extract exotic JPC states, identified as hybrid mesons in which an excited gluonic field is coupled to a color-octet qqbar pair, along with non-exotic hybrid mesons embedded in a qqbar-like spectrum.
Book Synopsis Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference by : Feng-kun Guo
Download or read book Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference written by Feng-kun Guo and published by World Scientific. This book was released on 2020-07-28 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the conference proceedings for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019), held in Guilin, China. It is among the most important conference series in the field of hadron spectroscopy and structure. Collecting more than 130 contributions from this conference, the book spans over the topics of meson and baryon spectroscopy, exotic hadrons, hadron production and interactions, analysis tools, QCD and hadron structure, hadrons in nuclear environment and hypernuclei. Summaries of the recent discoveries from Belle, BESIII, LHCb and other high-energy experiments, as well as recent theoretical developments in the above mentioned topics, are contained in this volume, rendering it as a valuable resource for researchers working on hadron spectroscopy and structure.
Book Synopsis Experimental Status of Exotic Mesons and the GlueX Experiment by : Daniel Carman
Download or read book Experimental Status of Exotic Mesons and the GlueX Experiment written by Daniel Carman and published by . This book was released on 2006 with total page 12011 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the unanswered and most fundamental questions in physics regards the nature of the confinement mechanism of quarks and gluons in QCD. Exotic hybrid mesons manifest gluonic degrees of freedom and their spectroscopy will provide the data necessary to test assumptions in lattice QCD and the specific phenomenology leading to confinement. Within the past two decades a number of experiments have put forth tantalizing evidence for the existence of exotic hybrid mesons in the mass range below 2 GeV. This talk represents an overview of the available data and what has been learned. In looking toward the future, the GlueX experiment at Jefferson Laboratory represents a new initiative that will perform detailed spectroscopy of the light-quark meson spectrum. This experiment and its capabilities will be reviewed.
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 386 pages. Available in PDF, EPUB and Kindle. Book excerpt: - Several of the authors give elementary introductions that lead to some duplication. This we believe is a positive feature since each author presents a different viewpoint emphasizing the particular topic of that chapter - The topics chosen are the closest Lattice QCD comes to more conventional particle and nuclear physics - The numerical results presented in the various chapters are most up-to-date
Book Synopsis Meson Spectroscopy at Non-zero Temperature Using Lattice QCD. by : Sergio Garcia-Mascaraque
Download or read book Meson Spectroscopy at Non-zero Temperature Using Lattice QCD. written by Sergio Garcia-Mascaraque and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Higgs and Heavy Meson Lattice Spectroscopy by : Mark Bryan Wurtz
Download or read book Higgs and Heavy Meson Lattice Spectroscopy written by Mark Bryan Wurtz and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lattice simulations are a first principles method of numerically studying the spectrum of bound states. In quantum chromodynamics (QCD), lattice simulations have had tremendous success in accurately calculating the hadron spectrum. They also provide a non-perturbative description of the Higgs mechanism, where spontaneously broken gauge symmetry is substituted by Higgs-confinement complementarity. Presented are studies of two different sectors of the standard model of particle physics using the latest methods in lattice spectroscopy. A search for exotic states in the SU(2)-Higgs model is performed using a variational analysis. All parameters are tuned to match their experimental values, including the recently discovered Higgs mass. A vast spectrum of multi-particle states is found and all are consistent with weakly interacting Higgs and W bosons, with no exotic candidates. In the QCD sector, the spectrum of heavy mesons that contain at least one bottom quark is extracted using free-form smearing. A new "minimal-path" implementation is introduced which maintains the usefulness of the original free-form smearing method and reduces its computational time dramatically. First lattice results of assorted radially and orbitally excited bottomonium and bottom-charm meson masses are presented. Calculations of the bottom-strange and bottom-up/down mesons are also performed. The methodology and results presented within are a significant contribution to the field of lattice spectroscopy.
Book Synopsis Light Meson Spectroscopy and Lattice QCD. by :
Download or read book Light Meson Spectroscopy and Lattice QCD. written by and published by . This book was released on 2008 with total page 114017 pages. Available in PDF, EPUB and Kindle. Book excerpt: I describe the status of lattice studies of mesons composed of light (u/d/s) quarks and of gluons, and describe the challenges and prospects for future calculations. I focus in particular on delineating single- and multiparticle states in the spectrum, and of discerning the properties of resonances.
Book Synopsis Exotic Hybrid Meson Spectroscopy with the GlueX Detector at Jlab by :
Download or read book Exotic Hybrid Meson Spectroscopy with the GlueX Detector at Jlab written by and published by . This book was released on 2014 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The GlueX experiment is scheduled to begin taking data in 2015. The goal is to discover evidence for the existence of exotic hybrid mesons and to map out their spectrum in the light quark sector. Recent theoretical developments using Lattice QCD predict exotic hybrid states in a mass range accessible using the newly upgraded 12GeV electron accelerator at Jefferson Lab. Hybrid mesons, and in particular exotic hybrid mesons, provide the ideal laboratory for testing QCD in the confinement regime since these mesons explicitly manifest the gluonic degrees of freedom. The experiment will use 9 GeV linearly polarized photons produced via coherent bremsstrahlung to produce the exotic hybrids. The decay products will be detected in the solenoid-based GlueX detector currently under construction at Jefferson Lab. The status of the GlueX experiment including detector parameters will be presented along with theoretical motivation for the experiment.
Book Synopsis The Meson Spectroscopy Program at the Jefferson Laboratory by :
Download or read book The Meson Spectroscopy Program at the Jefferson Laboratory written by and published by . This book was released on 2015 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: The experimental techniques that will be applied by the next generation meson spectroscopy experiments at JLab are described. For the first time, these experiments will be able to exploit the features of a photon beam of unprecedented intensity and momentum resolution, that will allow to perform precision studies of meson states with masses below 3 GeV/c2. Photon induced reactions will enhance the production of spin-1 mesons, that are of particular interest according to the most recent Lattice QCD calculations of the lightest exotic hybrid meson.
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: This work summarises the salient features of current and planned experiments into multiquark hadrons, describing various inroads to accommodate them within a theoretical framework. At a pedagogical level, authors review the salient aspects of quantum chromodynamics (QCD), the theory of strong interactions, which has been brought to the fore by high-energy physics experiments over recent decades. Compact diquarks as building blocks of a new spectroscopy are presented and confronted with alternative explanations of the XYZ resonances. Ways to distinguish among theoretical alternatives are illustrated, to be tested with the help of high luminosity LHC, electron-positron colliders, and the proposed Tera-Z colliders. Non-perturbative treatments of multiquark hadrons, such as large N expansion, lattice QCD simulations, and predictions about doubly heavy multiquarks are reviewed in considerable detail. With a broad appeal across high-energy physics, this work is pertinent to researchers focused on experiments, phenomenology or lattice QCD.
Book Synopsis Bπ Excited State Contamination in B Meson Observables Obtained from Lattice QCD by : Alexander Broll
Download or read book Bπ Excited State Contamination in B Meson Observables Obtained from Lattice QCD written by Alexander Broll and published by . This book was released on 2023* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Englische Version: Lattice simulations of Quantum Chromodynamics allow for a fully non-perturbative computation of hadronic correlation functions, but for a reliable extraction of physical quantities such as particle energies and matrix elements the contribution of excited states needs to be under control. In this thesis, an effective field theory known as Heavy Meson Chiral Perturbation Theory (HM ChPT) is used to analytically compute the dominant excited states contamination of B meson correlators which are relevant for the extraction of CKM matrix elements. First, the analogues of the quark bilinears which are used as interpolating fields in lattice simulations are derived in HM ChPT. These depend on a set of low energy constants (LECs) which are known for local fields. On the other hand, smeared interpolating fields can be incorporated in the effective theory by changing the values of these LECs, a fact that will be used throughout this thesis for investigating the effect of smearing. The interpolating fields are used to compute the B meson two-point function from which the B meson mass and decay constant as well as the respective excited states contamination can be extracted. From suitably chosen ratios of three-point functions and two-point functions, the HM ChPT LEC g, the form factors of semileptonic B meson decay, and the matrix elements of neutral B meson oscillations were determined. The computed excited states contamination of these ratios usually leads to an overestimation of the order of a few percent, depending on the values chosen for the LECs. Some results depend on so far unknown LECs, for which suitable correlation functions for a lattice determination are presented. In contrast, the excited states contamination of one of the semileptonic form factors is an order of magnitude larger and negative.
