Cargando…
Excited-state hadron masses using the stochastic LapH method
Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of spatially-extended hadron operators are used. The need for multi-hadron operators in addition to single-hadron operators is emphasized, necessitating the use of a new stochastic method of trea...
Autores principales: | , , , , , , |
---|---|
Lenguaje: | eng |
Publicado: |
2011
|
Materias: | |
Acceso en línea: | https://dx.doi.org/10.22323/1.139.0131 http://cds.cern.ch/record/1396057 |
_version_ | 1780923521022558208 |
---|---|
author | Bulava, John Foley, Justin Jhang, You-Cyuan Juge, Keisuke J. Lenkner, David Morningstar, Colin Wong, Chik Him |
author_facet | Bulava, John Foley, Justin Jhang, You-Cyuan Juge, Keisuke J. Lenkner, David Morningstar, Colin Wong, Chik Him |
author_sort | Bulava, John |
collection | CERN |
description | Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of spatially-extended hadron operators are used. The need for multi-hadron operators in addition to single-hadron operators is emphasized, necessitating the use of a new stochastic method of treating the low-lying modes of quark propagation which exploits Laplacian Heaviside quark-field smearing. A new glueball operator is tested and computing the mixing of this glueball operator with a quark-antiquark operator and multiple two-pion operators is shown to be feasible. Some of our initial results show warning signs about extracting high-lying resonance energies using only single-hadron operators. |
id | cern-1396057 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2011 |
record_format | invenio |
spelling | cern-13960572023-03-14T19:03:05Zdoi:10.22323/1.139.0131http://cds.cern.ch/record/1396057engBulava, JohnFoley, JustinJhang, You-CyuanJuge, Keisuke J.Lenkner, DavidMorningstar, ColinWong, Chik HimExcited-state hadron masses using the stochastic LapH methodParticle Physics - LatticeProgress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of spatially-extended hadron operators are used. The need for multi-hadron operators in addition to single-hadron operators is emphasized, necessitating the use of a new stochastic method of treating the low-lying modes of quark propagation which exploits Laplacian Heaviside quark-field smearing. A new glueball operator is tested and computing the mixing of this glueball operator with a quark-antiquark operator and multiple two-pion operators is shown to be feasible. Some of our initial results show warning signs about extracting high-lying resonance energies using only single-hadron operators.Progress in computing the spectrum of excited baryons and mesons in lattice QCD is described. Large sets of spatially-extended hadron operators are used. The need for multi-hadron operators in addition to single-hadron operators is emphasized, necessitating the use of a new stochastic method of treating the low-lying modes of quark propagation which exploits Laplacian Heaviside quark-field smearing. A new glueball operator is tested and computing the mixing of this glueball operator with a quark-antiquark operator and multiple two-pion operators is shown to be feasible. Some of our initial results show warning signs about extracting high-lying resonance energies using only single-hadron operators.arXiv:1111.0845oai:cds.cern.ch:13960572011-11-04 |
spellingShingle | Particle Physics - Lattice Bulava, John Foley, Justin Jhang, You-Cyuan Juge, Keisuke J. Lenkner, David Morningstar, Colin Wong, Chik Him Excited-state hadron masses using the stochastic LapH method |
title | Excited-state hadron masses using the stochastic LapH method |
title_full | Excited-state hadron masses using the stochastic LapH method |
title_fullStr | Excited-state hadron masses using the stochastic LapH method |
title_full_unstemmed | Excited-state hadron masses using the stochastic LapH method |
title_short | Excited-state hadron masses using the stochastic LapH method |
title_sort | excited-state hadron masses using the stochastic laph method |
topic | Particle Physics - Lattice |
url | https://dx.doi.org/10.22323/1.139.0131 http://cds.cern.ch/record/1396057 |
work_keys_str_mv | AT bulavajohn excitedstatehadronmassesusingthestochasticlaphmethod AT foleyjustin excitedstatehadronmassesusingthestochasticlaphmethod AT jhangyoucyuan excitedstatehadronmassesusingthestochasticlaphmethod AT jugekeisukej excitedstatehadronmassesusingthestochasticlaphmethod AT lenknerdavid excitedstatehadronmassesusingthestochasticlaphmethod AT morningstarcolin excitedstatehadronmassesusingthestochasticlaphmethod AT wongchikhim excitedstatehadronmassesusingthestochasticlaphmethod |