Excited nucleon spectrum with two flavors of dynamical fermions

Hadron Spectrum Collaboration

Excited nucleon spectrum with two flavors of dynamical fermions

Hadron Spectrum Collaboration

Research output: Contribution to journal › Conference article › peer-review

Abstract

We compute the spectrum of excited nucleons using the anisotropic Wilson lattice with two flavors of dynamical fermions. Using optimized sets of operators which transform irreducibly under the octahedral group, matrices of correlation functions are computed. We apply the variational method to these matrices to extract excited energy eigenstates. We obtain several states for each irrep and identify the continuum spin for the lowest-lying states, including a J^P =₂ ^{5 −} state.

Original language	English
Journal	Proceedings of Science
Volume	66
State	Published - 2008
Externally published	Yes
Event	26th International Symposium on Lattice Field Theory, LATTICE 2008 - Williamsburg, United States Duration: Jul 14 2008 → Jul 19 2008

Funding

This work was done using the Chroma software suite [7] on clusters at Jefferson Laboratory using time awarded under the USQCD Initiative. This research used resources of the National Center for Computational Sciences at Oak Ridge National Laboratory, which is supported by the Office of Science of the U.S. Department of Energy (DOE) Under contract DE-AC05-00OR22725 under the US DOE INCITE 2007 Program. This research was supported in part by the National Science Foundation through Teragrid Resources provided by the San Diego Supercomputing Center (Blue Gene). This work was also partially supported by National Science Foundation award PHY-0653315 and by the Department of Energy under contracts DE-AC05-06OR23177 and DE-FG02-93ER-40762. The U.S. Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce this manuscript for U.S. Government purposes.

Funders	Funder number
National Science Foundation	PHY-0653315
U.S. Department of Energy	DE-FG02-93ER-40762, DE-AC05-00OR22725, DE-AC05-06OR23177
Office of Science

Cite this

@article{38e8e5c8f7bc4eebb9c15f4aae28515b,

title = "Excited nucleon spectrum with two flavors of dynamical fermions",

abstract = "We compute the spectrum of excited nucleons using the anisotropic Wilson lattice with two flavors of dynamical fermions. Using optimized sets of operators which transform irreducibly under the octahedral group, matrices of correlation functions are computed. We apply the variational method to these matrices to extract excited energy eigenstates. We obtain several states for each irrep and identify the continuum spin for the lowest-lying states, including a JP =2 5 − state.",

author = "{Hadron Spectrum Collaboration} and Bulava, {John M.} and Edwards, {Robert G.} and Eric Engelson and B{\'a}lint Jo{\'o} and Adam Lichtl and Lin, {Huey Wen} and Nilmani Mathur and Colin Morningstar and Richards, {David G.} and Wallace, {Stephen J.}",

note = "Publisher Copyright: {\textcopyright} Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.; 26th International Symposium on Lattice Field Theory, LATTICE 2008 ; Conference date: 14-07-2008 Through 19-07-2008",

year = "2008",

language = "English",

volume = "66",

journal = "Proceedings of Science",

issn = "1824-8039",

publisher = "Sissa Medialab",

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TY - JOUR

T1 - Excited nucleon spectrum with two flavors of dynamical fermions

AU - Hadron Spectrum Collaboration

AU - Bulava, John M.

AU - Edwards, Robert G.

AU - Engelson, Eric

AU - Joó, Bálint

AU - Lichtl, Adam

AU - Lin, Huey Wen

AU - Mathur, Nilmani

AU - Morningstar, Colin

AU - Richards, David G.

AU - Wallace, Stephen J.

N1 - Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence.

PY - 2008

Y1 - 2008

N2 - We compute the spectrum of excited nucleons using the anisotropic Wilson lattice with two flavors of dynamical fermions. Using optimized sets of operators which transform irreducibly under the octahedral group, matrices of correlation functions are computed. We apply the variational method to these matrices to extract excited energy eigenstates. We obtain several states for each irrep and identify the continuum spin for the lowest-lying states, including a JP =2 5 − state.

AB - We compute the spectrum of excited nucleons using the anisotropic Wilson lattice with two flavors of dynamical fermions. Using optimized sets of operators which transform irreducibly under the octahedral group, matrices of correlation functions are computed. We apply the variational method to these matrices to extract excited energy eigenstates. We obtain several states for each irrep and identify the continuum spin for the lowest-lying states, including a JP =2 5 − state.

UR - http://www.scopus.com/inward/record.url?scp=85055337867&partnerID=8YFLogxK

M3 - Conference article

AN - SCOPUS:85055337867

SN - 1824-8039

VL - 66

JO - Proceedings of Science

JF - Proceedings of Science

T2 - 26th International Symposium on Lattice Field Theory, LATTICE 2008

Y2 - 14 July 2008 through 19 July 2008

ER -

Excited nucleon spectrum with two flavors of dynamical fermions

Abstract

Funding

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