Computer Physics Communications Program LibraryPrograms in Physics & Physical Chemistry |

[Licence| Download | New Version Template] adpt_v1_0.gz(6 Kbytes) | ||
---|---|---|

Manuscript Title: Relativistic three-quark bound states in separable two-quark
approximation. | ||

Authors: M. Oettel, L. van Smekal, R. Alkofer | ||

Program title: BSE | ||

Catalogue identifier: ADPT_v1_0Distribution format: gz | ||

Journal reference: Comput. Phys. Commun. 144(2002)63 | ||

Programming language: Fortran. | ||

Computer: Workstation DEC Aplha, LINUX PCs (AMD K7). | ||

Operating system: True-Unixv5.0, SuSe Linux 7.1. | ||

RAM: 10M words | ||

Word size: 32 | ||

Peripherals: disc. | ||

Keywords: Linear integral equations, Bethe-Salpeter equation, Nucleon model, Diquarks, Elementary particle physics, Phenomenological model. | ||

Classification: 11.6. | ||

Nature of problem:Diquarks are introduced as separable correlations in the two-quark Green's function to facilitate the description of baryons as relativistic three-quark bound states. These states then emerge as solutions of Bethe-Salpeter equations for quarks and diquarks that interact via quark exchange. | ||

Solution method:Chebyshev polynomials are used for an expansion of the Bethe-Salpeter vertex and wave functions and an (approximative) representation of the interaction kernel and propagators. The resulting set of coupled one-dimensional integral equations for the corresponding moments of vertex and wave function is converted to a matrix equation by employing Gaussian quadrature grid points. This equation is then solved iteratively for a certain test mass of the bound state. A bisection method in the bound state mass variable is used to determine the correct mass corresponding to the chosen quark and diquark parameters. | ||

Restrictions:The separable quark-quark correlations are restricted to the leading covariants in the scalar and axialvector (i.e. positive parity) channels. | ||

Additional comments:Programming issue The program has been tested with the following
compilers: DEC-f90v5.3, Lahey-Fujitsu-f95-LINUX-Expressv5.5,
NagWare-f95. | ||

Running time:Depending on the parameters and the desired accuracy between one and ten minutes on 1.2 GHz AMD K7. |

Disclaimer | ScienceDirect | CPC Journal | CPC | QUB |