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Author Morningstar, Colin ♦ Wong, Chik Him ♦ Juge, Keisuke J. ♦ Lenkner, David ♦ Bulava, John ♦ Foley, Justin ♦ Jhang, You-Cyuan
Source CERN Document Server
Content type Text
File Format PDF
Date Created 2011-11-04
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics ♦ Modern physics ♦ Technology ♦ Engineering & allied operations ♦ Applied physics
Subject Keyword Particle Physics - Lattice
Abstract 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.
Description Presented at: PoS LATTICE2011 (2011) pp.31 29th International Symposium on Lattice Field Theory, Squaw Valley, Lake Tahoe, CA, USA, 10 - 16 Jul 2011, pp.131
Learning Resource Type Article
Publisher Date 2011-01-01
Page Count 8