Markus Stauf - Academia.edu (original) (raw)

Papers by Markus Stauf

Research paper thumbnail of Comparison of many-body theories for correlated fermion systems

Verhandlungen der Deutschen Physikalischen Gesellschaft, 1999

Research paper thumbnail of The 0 nu bb-decay nuclear matrix elements with self-consistent short-range correlations

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements

Research paper thumbnail of The expontential-S-method in the momentum representation

Ziel dieser Arbeit war es, die globalen Eigenschaften, wie Bindungsenergie und Radius, von Atomke... more Ziel dieser Arbeit war es, die globalen Eigenschaften, wie Bindungsenergie und Radius, von Atomkernen auf der Basis von realistischen Nukleon Nukleon (NN)Wechselwirkungen zu berechnen. Wegen der starken kurzreichweitigen Komponenten in solch realistischen NN Wechselwirkungen muss man dazu Methoden der Vielteilchentheorie benutzen, die über eine einfache Mean Field oder Hartree Fock Beschreibung hinausgeht.The aim of this work was, to describe the global characteristics like binding energy and radius of atomic nuclei on basis of realistic nucleon nucleon interactions. Because of the strong short-range components of the nucleon nucleon interaction, methods of many-body-theory have to be used, that go beyond mean field method or hartree fock method

Research paper thumbnail of The 0nbb-decay nuclear matrix elements with self-consistent short-range correlations

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements.

Research paper thumbnail of Die Exponential-S-Methode in der Impulsdarstellung

Research paper thumbnail of 0νββ-decay nuclear matrix elements with self-consistent short-range correlations

Physical Review C, 2009

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements.

Research paper thumbnail of 0-decay nuclear matrix elements with self-consistent short-range correlations

Physical Review C, 2009

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0νββ) of 76 Ge, 82 Se, 96 Zr, 100 M o, 116 Cd, 128 T e, 130 T e and 130 Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from chargedependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0νββ decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0νββ-decay matrix elements.

Research paper thumbnail of 0nubetabeta-decay nuclear matrix elements with self-consistent short-range correlations

Physical Review C, 2009

A self-consistent calculation of nuclear matrix elements of the neutrinoless double-beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double-beta decays (0νββ) of Ge76, Se82, Zr96, Mo100, Cd116, Te128, Te130, and Xe136 is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely, from the charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations, matrix elements for the 0νββ decay are obtained that are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0νββ-decay matrix elements.

Research paper thumbnail of Short-range and tensor correlations in the 16O(e,e'pn) reaction

Physical Review C, 1999

The cross sections for electron induced two-nucleon knockout reactions are evaluated for the exam... more The cross sections for electron induced two-nucleon knockout reactions are evaluated for the example of the 16^{16}16O(e,e$'$pn)$^{14}$N reaction leading to discrete states in the residual nucleus 14^{14}14N. These calculations account for the effects of nucleon-nucleon correlations and include the contributions of two-body meson exchange currents as the pion seagull, pion in flight and the isobar current contribution. The effects of short-range as well as tensor correlations are calculated within the framework of the coupled cluster method employing the Argonne V14 potential as a model for a realistic nucleon-nucleon interaction. The relative importance of correlation effects as compared to the contribution of the meson exchange currents depends on the final state of the residual nucleus. The cross section leading to specific states, like e.g. the ground state of 14^{14}14N, is rather sensitive to the details of the correlated wave function.

Research paper thumbnail of Comparison of many-body theories for correlated fermion systems

Verhandlungen der Deutschen Physikalischen Gesellschaft, 1999

Research paper thumbnail of The 0 nu bb-decay nuclear matrix elements with self-consistent short-range correlations

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements

Research paper thumbnail of The expontential-S-method in the momentum representation

Ziel dieser Arbeit war es, die globalen Eigenschaften, wie Bindungsenergie und Radius, von Atomke... more Ziel dieser Arbeit war es, die globalen Eigenschaften, wie Bindungsenergie und Radius, von Atomkernen auf der Basis von realistischen Nukleon Nukleon (NN)Wechselwirkungen zu berechnen. Wegen der starken kurzreichweitigen Komponenten in solch realistischen NN Wechselwirkungen muss man dazu Methoden der Vielteilchentheorie benutzen, die über eine einfache Mean Field oder Hartree Fock Beschreibung hinausgeht.The aim of this work was, to describe the global characteristics like binding energy and radius of atomic nuclei on basis of realistic nucleon nucleon interactions. Because of the strong short-range components of the nucleon nucleon interaction, methods of many-body-theory have to be used, that go beyond mean field method or hartree fock method

Research paper thumbnail of The 0nbb-decay nuclear matrix elements with self-consistent short-range correlations

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements.

Research paper thumbnail of Die Exponential-S-Methode in der Impulsdarstellung

Research paper thumbnail of 0νββ-decay nuclear matrix elements with self-consistent short-range correlations

Physical Review C, 2009

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0nbb) of 76Ge, 82Se, 96Zr, 100Mo, 116Cd, 128Te, 130Te and 130Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0nbb-decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0nbb-decay matrix elements.

Research paper thumbnail of 0-decay nuclear matrix elements with self-consistent short-range correlations

Physical Review C, 2009

A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double beta decays (0νββ) of 76 Ge, 82 Se, 96 Zr, 100 M o, 116 Cd, 128 T e, 130 T e and 130 Xe is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely from chargedependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations matrix elements for the 0νββ decay are obtained, which are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0νββ-decay matrix elements.

Research paper thumbnail of 0nubetabeta-decay nuclear matrix elements with self-consistent short-range correlations

Physical Review C, 2009

A self-consistent calculation of nuclear matrix elements of the neutrinoless double-beta decays (... more A self-consistent calculation of nuclear matrix elements of the neutrinoless double-beta decays (0νββ) of Ge76, Se82, Zr96, Mo100, Cd116, Te128, Te130, and Xe136 is presented in the framework of the renormalized quasiparticle random phase approximation (RQRPA) and the standard QRPA. The pairing and residual interactions as well as the two-nucleon short-range correlations are for the first time derived from the same modern realistic nucleon-nucleon potentials, namely, from the charge-dependent Bonn potential (CD-Bonn) and the Argonne V18 potential. In a comparison with the traditional approach of using the Miller-Spencer Jastrow correlations, matrix elements for the 0νββ decay are obtained that are larger in magnitude. We analyze the differences among various two-nucleon correlations including those of the unitary correlation operator method (UCOM) and quantify the uncertainties in the calculated 0νββ-decay matrix elements.

Research paper thumbnail of Short-range and tensor correlations in the 16O(e,e'pn) reaction

Physical Review C, 1999

The cross sections for electron induced two-nucleon knockout reactions are evaluated for the exam... more The cross sections for electron induced two-nucleon knockout reactions are evaluated for the example of the 16^{16}16O(e,e$'$pn)$^{14}$N reaction leading to discrete states in the residual nucleus 14^{14}14N. These calculations account for the effects of nucleon-nucleon correlations and include the contributions of two-body meson exchange currents as the pion seagull, pion in flight and the isobar current contribution. The effects of short-range as well as tensor correlations are calculated within the framework of the coupled cluster method employing the Argonne V14 potential as a model for a realistic nucleon-nucleon interaction. The relative importance of correlation effects as compared to the contribution of the meson exchange currents depends on the final state of the residual nucleus. The cross section leading to specific states, like e.g. the ground state of 14^{14}14N, is rather sensitive to the details of the correlated wave function.