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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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47 papers · 1 filter
Weil Algebras and Supersymmetry
Mauri Miettinen
We give a new interpretation for the super loop space that has been used to formulate supersymmetry. The fermionic coordinates in the super loop space are identified as the odd gen…
Systematic effects in the determination of the piNN Coupling from pbar p -> nbar n differential cross section
T. E. O. Ericson, B. Loiseau
We show that the coupling constant extracted model-independently from charge exchange is subject to a systematic correction, and, more importantly, that the strong…
Modified Artificial Viscosity in Smooth Particle Hydrodynamics
Magnus Selhammar
Artificial viscosity is needed in Smooth Particle Hydrodynamics to prevent interparticle penetration, to allow shocks to form and to damp post shock oscillations. Artificial viscos…
X-rays and gamma-rays from accretion flows onto black holes in Seyferts and X-ray binaries
Andrzej A. Zdziarski, W. Neil Johnson, Juri Poutanen +2
We review observations and theoretical models of X-ray/gamma-ray spectra of radio-quiet Seyfert galaxies and of Galactic black-hole candidates (in the hard spectral state). The obs…
Comparison of the Near-Threshold Production of eta- and K-Mesons in Proton-Proton Collisions
Goran Faldt, Colin Wilkin
The pp -> pp eta and pp -> pLambda K^+ reactions near threshold are dominated by the first and second S_11 resonance respectively. It is shown that a one-pion-exchange model exciti…
Dimensionally Reduced Yang-Mills Theories in Noncommutative Geometry
Jussi Kalkkinen
We study a class of noncommutative geometries that give rise to dimensionally reduced Yang-Mills theories. The emerging geometries describe sets of copies of an even dimensional ma…
Accurate Measurement of F2d/F2p and Rd-Rp
The New Muon Collaboration
Results are presented for F2d/F2p and Rd-Rp from simultaneous measurements of deep inelastic muon scattering on hydrogen and deuterium targets, at 90, 120, 200 and 280 GeV. The dif…
Carbon Stars and Nucleosynthesis in Galaxies
Bengt Gustafsson, Nils Ryde
The role of carbon stars in the build-up of chemical elements in galaxies is discussed on the basis of stellar evolution calculations and estimated stellar yields, abundance analys…
Knots and Particles
L. Faddeev, Antti J. Niemi
Using methods of high performance computing, we have found indications that knotlike structures appear as stable finite energy solitons in a realistic 3+1 dimensional model. We hav…
Scattering Wave Functions at Bound State Poles
Goeran Faeldt, Colin Wilkin
The normalisation relation between the bound and scattering S-state wave functions, extrapolated to the bound state pole, is derived from the Schroedinger equation. It is shown tha…
BRST Formulation of Partition Function Constraints
J. Alfaro, K. Bering, P. H. Damgaard
We show that constraints on the generating functional have direct BRST-extensions in terms of nilpotent operators that annihilate this generating functional, and which may be o…
The Heterotic Life of the D-particle
Ulf H. Danielsson, Gabriele Ferretti
We study the dynamics of D-particles (D0-branes) in type I' string theory and of the corresponding states in the dual heterotic description. We account for the presence of the two…
Measurement of the proton and deuteron structure functions, F2p and F2d, and of the ratio sigma(L)/sigma(T)
The New Muon Collaboration
The muon-proton and muon-deuteron inclusive deep inelastic scattering cross sections were measured in the kinematic range 0.002 < x < 0.60 and 0.5 < Q2 < 75 GeV2 at incident muon e…
Galilean non-invariance of geometric phase
Erik Sjoeqvist, Henrik Carlsen, Harvey R. Brown
It is shown that geometric phase in non-relativistic quantum mechanics is not Galilean invariant.
Triplet np Final State Interactions at Large Momentum Transfers
A. Boudard, G. Faeldt, C. Wilkin
Using the simple relation between the np scattering and bound state wave functions, the spin-triplet contributions to the pp -> pi+ (pn) and backward dp -> p(pn) reactions are esti…
Metallicities and kinematics of G and K dwarfs
Chris Flynn, Olof Morell
We have developed a photometric abundance indicator for G and K dwarfs, based on accurate, spectroscopically determined abundances for G and K dwarfs of Morell, Källander and Butch…
Distortion of the acoustic peaks in the CMBR due to a primordial magnetic field
Jenni Adams, Ulf H. Danielsson, Dario Grasso +1
In this paper we study the effect of a magnetic field on the fluctuation spectrum of the cosmic microwave background. We find that upcoming measurements might give interesting boun…
Natural Supergravity inflation
Jennifer A. Adams, Graham G. Ross, Subir Sarkar
We identify a new mechanism in supergravity theories which leads to successful inflation without any need for fine tuning. The simplest model yields a spectrum of density fluctuati…
Comparing conductance quantization in quantum wires and Quantum Hall systems
Anton Yu. Alekseev, Vadim V. Cheianov, Jürg Fröhlich
We propose a new calculation of the DC conductance of a 1-dimensional electron system described by the Luttinger model. Our approach is based on the ideas of Landauer and Büttiker…
The Critical Exponents Of The Matrix Valued Gross-Neveu Model
Gabriele Ferretti
We study the large N limit of the MATRIX valued Gross-Neveu model in 2<d<4 dimensions. The method employed is a combination of the approximate recursion formula of Polyakov and Wil…
Indirect Neutralino Detection Rates in Neutrino Telescopes
L. Bergstrom, J. Edsjo, P. Gondolo
Neutralinos annihilating in the center of the Sun or the Earth may give rise to a detectable signal of neutrinos. We derive the indirect detection rates for neutrino telescopes in…
Threshold Production of the Hypertriton
Anders Gardestig
The cross section for threshold production of the hypertriton in the reaction pd->^3_ΛH K^+ is calculated in a two-step model and compared to the break-up process pd -> d\LambdaK^+…
Antibrackets, Supersymmetric -Model and Localization
Mauri Miettinen
We consider supersymmetrization of Hamiltonian dynamics via antibrackets for systems whose Hamiltonian generates an isometry of the phase space. We find that the models are closely…
Properties of HERA Events from DIS on Pions in the Proton
M. Przybycien, A. Szczurek, G. Ingelman
Recently the concept of the pion cloud in the nucleon turned out to be successful in understanding the Gottfried sum rule violation observed by the New Muon Collaboration and the D…