Mapping of composite hadrons into elementary hadrons and effective hadronic Hamiltonians
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Date
1998-09-01
Advisor
Coadvisor
Graduate program
Undergraduate course
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Volume Title
Publisher
Academic Press Inc.
Type
Artigo
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Acesso restrito
Abstract
A mapping technique is used to derive in the context of constituent quark models effective Hamiltonians that involve explicit hadron degrees of freedom. The technique is based on the ideas of mapping between physical and ideal Fock spaces and shares similarities with the quasiparticle method of Weinberg. Starting with the Fock-space representation of single-hadron states, a change of representation is implemented by a unitary transformation such that composites are redescribed by elementary Bose and Fermi field operators in an extended Fock space. When the unitary transformation is applied to the microscopic quark Hamiltonian, effective, hermitian Hamiltonians with a clear physical interpretation are obtained. Applications and comparisons with other composite-particle formalisms of the recent literature are made using the nonrelativistic quark model. (C) 1998 Academic Press.
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Language
English
Citation
Annals of Physics. San Diego: Academic Press Inc., v. 268, n. 1, p. 105-148, 1998.