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nucl-th2000★ 28 cited

Nucleon Polarisabilities from Compton Scattering on the Deuteron

Harald W. Griesshammer, Gautam Rupak

An analytic calculation of the differential cross section for elastic Compton scattering on the deuteron at photon energies ωin the range of 25-50 MeV is presented to next-to-next-…

math-ph2000★ 43 cited

The Vlasov-Poisson system with radiation damping

Markus Kunze, Alan D. Rendall

We set up and analyze a model of radiation damping within the framework of continuum mechanics, inspired by a model of post-Newtonian hydrodynamics due to Blanchet, Damour and Scha…

hep-ph2000★ 5 cited

Chargino searches at LEP for complex MSSM parameters

Nabil Ghodbane, Stavros Katsanevas, Imad Laktineh +1

We reanalyze the results of the chargino searches at LEP (on the basis of the DELPHI 189 GeV data sample), including the possibility of complex MSSM parameters. We point out the po…

nucl-th2000★ 19 cited

Photoproduction of quasi-bound omega mesons in nuclei

E. Marco, W. Weise

We propose the (gamma,p) reaction as a means of producing possible quasi-bound states of omega mesons in nuclei. We use an effective Lagrangian, based on chiral SU(3) symmetry and…

cond-mat.mes-hall2000★ 12 cited

Analysis of the temperature-dependent quantum point contact conductance in view of the metal-insulator transition in two dimensions

V. Senz, T. Heinzel, T. Ihn +5

The temperature dependence of the conductance of a quantum point contact has been measured. The conductance as a function of the Fermi energy shows temperature-independent fixed po…

cond-mat.str-el2000

Polarized Neutron Scattering

B. Roessli, P. Böni

The technique of polarized neutron scattering is reviewed with emphasis on applications. Many examples of the usefulness of the method in various fields of physics are given like t…

hep-ph2000★ 3 cited

Coordinate Space Distributions of Antiquark Flavor Asymmetries in the Proton

Ernest M. Henley, Thorsten Renk, Wolfram Weise

We examine the space-time properties of the distribution (dbar - ubar) and dbar/ubar in the proton. The difference of the antiquark distributions shows the expected peak at the app…

hep-ph2000★ 37 cited

Is nonperturbative inflatino production during preheating a real threat to cosmology?

Rouzbeh Allahverdi, Mar Bastero-Gil, Anupam Mazumdar

We discuss toy models where supersymmetry is broken due to non-vanishing time-varying vacuum expectation value of the inflaton field during preheating. We discuss the production of…

math.FA2000

Orthonormal bases of polynomials in one complex variable

D. P. L. Castrigiano, W. Klopfer

Let a sequence of polynomials in one complex variable satisfy a recurre ce relation with length growing slowlier than linearly. It is shown that is an orthonormal…

math-ph2000★ 1 cited

The infrared behaviour in Nelson's model of a quantum particle coupled to a massless scalar field

Jozsef Lorinczi, Robert A. Minlos, Herbert Spohn

We prove that Nelson's massless scalar field model is infrared divergent in three dimensions. In particular, the Nelson Hamiltonian and the Hamiltonian obtained from Euclidean quan…

cond-mat.mtrl-sci2000★ 498 cited

First-principles prediction of structure, energetics, formation enthalpy, elastic constants, polarization, and piezoelectric constants of AlN, GaN, and InN: comparison of local and gradient-corrected density-functional theory

A. Zoroddu, F. Bernardini, P. Ruggerone +1

A number of diverse bulk properties of the zincblende and wurtzite III-V nitrides AlN, GaN, and InN, are predicted from first principles within density functional theory using the…

nucl-th2000★ 45 cited

Moments of Inertia of Nuclei in the Rare Earth Region: A Relativistic versus Non-Relativistic Investigation

A. V. Afanasjev, J. Konig, P. Ring +2

A parameter free investigation of the moments of inertia of ground state rotational bands in well deformed rare-earth nuclei is carried out using Cranked Relativistic Hartree-Bogol…

nucl-th2000

Cranked relativistic Hartree-Bogoliubov theory: Superdeformation in the mass region

A. V. Afanasjev, P. Ring

A systematic investigation of the yrast superdeformed (SD) rotational bands in even-even nuclei of the mass region has been performed within the framework of the cranke…

math-ph2000★ 2 cited

Semi-classical motion of dressed electrons

Stefan Teufel, Herbert Spohn

We consider an electron coupled to the quantized radiation field and subject to a slowly varying electrostatic potential. We establish that over sufficiently long times radiation e…

cond-mat.mtrl-sci2000★ 209 cited

Accurate calculation of polarization-related quantities in semiconductors

F. Bernardini, V. Fiorentini, D. Vanderbilt

We demonstrate that polarization-related quantities in semiconductors can be predicted accurately from first-principles calculations using the appropriate approach to the problem,…

cond-mat.str-el2000

Spin Excitations in Localized and Itinerant Magnets

B. Roessli, P. Böni

Collective excitations in magnetic materials can be investigated by means of inelastic neutron scattering. We show that this experimental method gives access to the complete spectr…

cond-mat.mes-hall2000★ 74 cited

Quantum Hall Ferromagnetism in a Two-Dimensional Electron System

J. Eom, H. Cho, W. Kang +4

Experiments on a nearly spin degenerate two-dimensional electron system reveals unusual hysteretic and relaxational transport in the fractional quantum Hall effect regime. The tran…

hep-ph2000★ 50 cited

Direct Detection of Neutralino Dark Matter and the Anomalous Dipole Moment of the Muon

Manuel Drees, Yeong Gyun Kim, Tatsuo Kobayashi +1

We compare predictions for the spin-independent contribution to the neutralino-proton scattering cross section $\sig$ and for the anomalous magnetic dipole moment of the muon, $a_μ…

cond-mat.mes-hall2000★ 25 cited

Spin effects in the magneto-drag between double quantum wells

J. G. S. Lok, S. Kraus, M. Pohlt +4

We report on the selectivity to spin in a drag measurement. This selectivity to spin causes deep minima in the magneto-drag at odd fillingfactors for matched electron densities at…

nucl-th2000★ 1 cited

Chaos and isospin symmetry breaking in rotational nuclei

J. A. Sheikh, A. T. Kruppa, N. Rowley

For nuclei with N = Z, the isospin degree of freedom is important and, for deformed systems, rotational bands of different isospin may be expected at low excitation energies. We ha…

cond-mat.str-el2000★ 1 cited

Macroscopic and Local Magnetic Moments in Si-doped CuGeO with Neutron and SR Studies

F. Semadeni, A. Amato, B. Roessli +5

The temperature-concentration phase diagram of the Si-doped spin-Peierls compound CuGeO is investigated by means of neutron scattering and muon spin rotation spectroscopy in…

cond-mat.mtrl-sci2000★ 4 cited

Roughening of close-packed singular surfaces

F. Trudu, V. Fiorentini, P. Ruggerone +1

An upper bound to the roughening temperature of a close-packed singular surface, fcc Al (111), is obtained via free energy calculations based on thermodynamic integration using the…

hep-ph2000★ 3 cited

Twist-3 contribution to the amplitude in the Wandzura-Wilczek approximation

N. Kivel, L. Mankiewicz

We have calculated the Wandzura-Wilczek contribution to the twist-3 part of amplitude. It describes interaction of the longitudinally polarized virtual photon with the…

nucl-th2000

Nuclear Shadowing and the Optics of Hadronic Fluctuations

G. Piller, M. Vänttinen, L. Mankiewicz +1

A coordinate space description of shadowing in deep-inelastic lepton-nucleus scattering is presented. The picture in the laboratory frame is that of quark-gluon fluctuations of the…