Excited nucleon spectrum from lattice QCD with maximum entropy method
نویسندگان
چکیده
منابع مشابه
Excited nucleon spectrum from lattice QCD with maximum entropy method
We study excited states of the nucleon in quenched lattice QCD with the spectral analysis using the maximum entropy method. Our simulations are performed on three lattice sizes 16 × 32, 24 × 32 and 32 × 32, at β = 6.0 to address the finite volume issue. We find a significant finite volume effect on the mass of the Roper resonance for light quark masses. After removing this systematic error, its...
متن کاملSpectral function and excited states in lattice QCD with the maximum entropy method
~CP-PACS Collaboration! Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan Center for Computational Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8577, Japan Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582, Japan High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan ~Received 30 May 2001; published...
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We study the mass spectra of excited baryons with the use of the lattice QCD simulations. We focus our attention on the problem of the level ordering between the positive-parity excited stateN (1440) (the Roper resonance) and the negative-parity excited state N(1535). Nearly perfect parity projection is accomplished by combining the quark propagators with periodic and anti-periodic boundary con...
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We propose a method to calculate the QCD level density directly from the thermodynamic quantities obtained by lattice QCD simulations with the use of the maximum entropy method (MEM). Understanding QCD thermodynamics from QCD spectral properties has its own importance. Also it has a close connection to phenomenological analyses of the lattice data as well as experimental data on the basis of ha...
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Recent advances in lattice field theory, in computer technology and in chiral perturbation theory have enabled lattice QCD to emerge as a powerful quantitative tool in understanding hadron structure. I describe recent progress in the computation of the nucleon form factors and moments of parton distribution functions, before proceeding to describe lattice studies of the Generalized Parton Distr...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2004
ISSN: 0920-5632
DOI: 10.1016/s0920-5632(03)02533-7