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42 papers · 1 filter
Regular nilpotent elements and quantum groups
A. Sevostyanov
We suggest new realizations of quantum groups corresponding to complex simple Lie algebras, and of affine quantum groups. These new realizations are labeled by Coxeter elements of…
Dynamics of blue compact galaxies, as revealed by their H-alpha velocity fields I. The data, velocity fields and rotation curves
G. Östlin, P. Amram, J. Masegosa +2
Observations of six luminous blue compact galaxies (BCGs) and two star forming companion galaxies were carried out with the CIGALE scanning Fabry-Perot interferometer attached to t…
Spin dependent structure function at small and small
B. Badełek, J. Kwieciński
Theoretical expectations concerning the low and low behaviour of are summarized and compared with the recent SMC data.
Structure in two_pion production in the d d -> alpha X reaction
Anders Gardestig, Goran Faldt, Colin Wilkin
A model for the d d -> alpha pi pi reaction, based on two parallel N N -> d pi reactions, is extended to incorporate a complete set of input amplitudes. While low-energy cross sect…
D-branes in the WZW model
A. Yu. Alekseev, V. Schomerus
It is stated in the literature that D-branes in the WZW-model associated with the gluing condition J = - \bar{J} along the boundary correspond to branes filling out the whole group…
Vacua, Propagators, and Holographic Probes in AdS/CFT
Ulf H. Danielsson, Esko Keski-Vakkuri, Martin Kruczenski
In this paper we investigate the relation between the bulk and boundary in AdS/CFT. We first discuss the relation between the Poincare and the global vacua, and then study various…
Nonlinear dynamic susceptibilities of interacting and noninteracting nanoparticle systems
P. Jönsson, T. Jonsson, J. L. García-Palacios +1
The linear and cubic dynamic susceptibilities of solid dispersions of nano-sized maghemite particles have been measured for three samples with a volume concentration of magnetic pa…
Remarks on identical particles in de Broglie-Bohm theory
Harvey R. Brown, Erik Sjoeqvist, Guido Bacciagaluppi
It is argued that the topological approach to the (anti-)symmetrisation condition for the quantum state of a collection of identical particles, defined in the `reduced' configurati…
The nature of the circumstellar CO_2 emission from M giants
N. Ryde, K. Eriksson, B. Gustafsson
The 13-16 um region observed by the Infrared Space Observatory (ISO) of several ABG stars are discussed. We present and analyse spectra of seven M giants which show carbon dioxide…
The origin of carbon, investigated by spectral analysis of solar-type stars in the Galactic Disk
B. Gustafsson, T. Karlsson, E. Olsson +2
Abundance analysis of carbon has been performed in a sample of 80 late F and early G type dwarf stars in the metallicity range -1.06 < [Fe/H] < 0.26 using the forbidden [C I] line…
Higher Partial Waves in p+p->p+p+eta near Threshold
H. Calen, J. Dyring, G. Faldt +35
Exclusive measurements of the production of eta mesons in the p+p->p+p+eta reaction have been carried out at excess energies of 16 and 37 MeV above threshold. The deviations from p…
A Search for Heavy Stable and Long-Lived Squarks and Sleptons in e^+ e^- Collisions at Energies from 130 to 183 GeV
DELPHI Collaboration, P. Abreu et al
A search for stable and long-lived heavy charged particles used the data taken by the DELPHI experiment at energies from 130 to 183 GeV. The Cherenkov light detected in the Ring Im…
Generalized Calogero models through reductions by discrete symmetries
Alexios P. Polychronakos
We construct generalizations of the Calogero-Sutherland-Moser system by appropriately reducing a classical Calogero model by a subset of its discrete symmetries. Such reductions re…
Magnetic Relaxation Phenomena in a CuMn Spin Glass
C. Djurberg, K. Jonason, P. Nordblad
Experiments on the temperature and time dependence of the response function and the field cooled magnetisation of a Cu(Mn) spin glass at temperatures below the zero field spin glas…
Study of the ABC Enhancement in the d d -> alpha X reaction
R. Wurzinger, O. Bing, M. Boivin +13
The polarized d d -> alpha X reaction at beam energies close to the eta threshold shows very strong structure in the missing mass corresponding to the ABC enhancement. The deuteron…
Relaxation of the field-cooled magnetization of an Ising spin glass
T. Jonsson, K. Jonason, P. Nordblad
The time and temperature dependence of the field-cooled magnetization of a three dimensional Ising spin glass, Fe_{0.5}Mn_{0.5}TiO_{3}, has been investigated. The temperature and c…
Observation of strong final-state effects in pi+ production in pp collisions at 400 MeV
A. Betsch, R. Bilger, W. Brodowski +29
Differential cross sections of the reactions and have been measured at MeV by detecting the charged ejectiles in the angular range $4^0 \le…
Finite Type Invariants of Classical and Virtual Knots
M. Goussarov, M. Polyak, O. Viro
We observe that any knot invariant extends to virtual knots. The isotopy classification problem for virtual knots is reduced to an algebraic problem formulated in terms of an algeb…
The AMANDA Neutrino Telescope
F. Halzen
With an effective telescope area of order m for TeV neutrinos, a threshold near 50 GeV and a pointing accuracy of 2.5 degrees per muon track, the AMANDA detector r…
Bulk and Boundary Dynamics in BTZ Black Holes
Esko Keski-Vakkuri
Recently, the AdS/CFT conjecture of Maldacena has been investigated in Lorentzian signature by Balasubramanian et. al. We extend this investigation to Lorentzian BTZ black hole spa…
Investigation of the Critical Behavior of the Critical Point of the Z2 Gauge Lattice
Y. Blum, P. K. Coyle, S. Elitzur +3
We investigate, through Monte-Carlo simulations, the nature of the second order point in a (Bosonic) + gauge theory in four dimensions. Detailed analysis of the critica…
Sensitivity to temperature perturbations of the ageing states in a re-entrant ferromagnet
Kristian Jonason, Per Nordblad
Dynamic magnetic properties and ageing phenomena of the re-entrant ferromagnet (Fe0.20Ni0.80)75P16B6Al3 are investigated by time dependent zero field cooled magnetic relaxation, m…
Non-equilibrium dynamics in a 3d spin-glass
T. Jonsson, K. Jonason, P. Jonsson +1
Non-equilibrium dynamics in a Ag(11%Mn) spin-glass has been studied by low frequency ac-susceptibility and magnetic relaxation experiments. The results unequivocally show that spin…
Observable frequency shifts via spin-rotation coupling
Bahram Mashhoon, Richard Neutze, Mark Hannam +1
The phase perturbation arising from spin-rotation coupling is developed as a natural extension of the celebrated Sagnac effect. Experimental evidence in support of this phase shift…