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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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178 papers · 1 filter
Search for anomalous top quark couplings with the D0 detector
D0 Collaboration, V. Abazov
Anomalous Wtb couplings modify the angular correlations of the top quark decay products and change the single top quark production cross section. We present limits on anomalous top…
Heterogeneous nucleation and adatom detachment at 1-D growth of Indium on Si(100)-2x1
Jakub Javorský, Martin Setvín, Ivan Ošt'ádal +2
Growth of atomic indium chains - 1D islands - on the Si(100)-2x1 surface was observed by scanning tunneling microscopy (STM) at room temperature and simulated by means of a kinetic…
General Kundt spacetimes in higher dimensions
Jiri Podolsky, Martin Zofka
We investigate a general metric of the Kundt class of spacetimes in higher dimensions. Geometrically, it admits a non-twisting, non-shearing and non-expanding geodesic null congrue…
Solution of Peter Winkler's Pizza Problem
Josef Cibulka, Jan Kynčl, Viola Mészáros +2
Bob cuts a pizza into slices of not necessarily equal size and shares it with Alice by alternately taking turns. One slice is taken in each turn. The first turn is Alice's. She may…
Structure of the curvature tensor on symplectic spinors
Svatopluk Krýsl
We study symplectic manifolds equipped with a symplectic torsion-free affine (also called Fedosov) connection and admitting a metaplectic structure. Let $\mat…
Simultaneous H.E.S.S. and Chandra observations of Sagittarius A* during an X-ray flare
H. E. S. S. Collaboration, :, F. Aharonian
The rapidly varying (~10 minute timescale) non-thermal X-ray emission observed from Sgr A* implies that particle acceleration is occuring close to the event horizon of the supermas…
Apparent horizons in D-dimensional Robinson-Trautman spacetime
Otakar Svitek
We derive the higher dimensional generalization of Penrose-Tod equation describing apparent horizons in Robinson-Trautman spacetimes. New results concerning the existence and uniqu…
Large-scale horizontal flows in the solar photosphere. IV. On the vertical structure of large-scale horizontal flows
Michal Svanda, Mirek Klvana, Michal Sobotka +2
In the recent papers, we introduced a method utilised to measure the flow field. The method is based on the tracking of supergranular structures. We did not precisely know, whether…
Very high energy gamma-ray observations of the galaxy clusters Abell 496 and Abell 85 with H.E.S.S
H. E. S. S. Collaboration, :, F. Aharonian
Aims: The nearby galaxy clusters Abell 496 and Abell 85 are studied in the very high energy (VHE, E > 100 GeV) band to investigate VHE cosmic rays (CRs) in this class of objects wh…
The warped young stellar disc in the Galactic Centre
L. Subr, J. Schovancova, P. Kroupa
Within the central parsec of the Galaxy, several tens of young stars orbiting a central supermassive black hole are observed. A subset of these stars forms a coherently rotating di…
Warping the young stellar disc in the Galactic Centre
Ladislav Subr, Jaroslava Schovancova
We examine influence of the circum-nuclear disc (CND) upon the orbital evolution of young stars in the Galactic Centre. We show that gravity of the CND causes precession of the orb…
SMBH feeding and star formation in massive accretion discs
Ladislav Subr
Galactic nuclei are unique laboratories for the study of processes connected with the accretion of gas onto supermassive black holes. At the same time, they represent challenging e…
Buchsteiner loops: associators and constructions
Ales Drapal, Michael Kinyon
Let be a Buchsteiner loop. We describe the associator calculus in three variables, and show that if is not conjugacy closed. We also show that if…
Lower bounds for weak epsilon-nets and stair-convexity
Boris Bukh, Jiří Matoušek, Gabriel Nivasch
A set N is called a "weak epsilon-net" (with respect to convex sets) for a finite set X in R^d if N intersects every convex set that contains at least epsilon*|X| points of X. For…
Skyrme-Random-Phase-Approximation description of E1 strength in 92-100Mo
J. Kvasil, P. Vesely, V. O. Nesterenko +3
The isovector dipole E1 strength in Mo isotopes with A=92,94,96,98,100 is analyzed within the self-consistent separable random-phase approximation (SRPA) model with Skyrme forces S…
The structure of Valdivia compact lines
Ondrej Kalenda, Wieslaw Kubis
We study linearly ordered spaces which are Valdivia compact in their order topology. We find an internal characterization of these spaces and we present a counter-example disprovin…
Coloring plane graphs with independent crossings
Daniel Král', Ladislav Stacho
We show that every plane graph with maximum face size four whose all faces of size four are vertex-disjoint is cyclically 5-colorable. This answers a question of Albertson whether…
Response of the CALICE Si-W Electromagnetic Calorimeter Physics Prototype to Electrons
CALICE Collaboration
A prototype Silicon-Tungsten electromagnetic calorimeter (ECAL) for an International Linear Collider (ILC) detector was installed and tested during summer and autumn 2006 at CERN.…
Factor analysis of the long gamma-ray bursts
Z. Bagoly, L. Borgonovo, A. Meszaros +2
We study statistically 197 long gamma-ray bursts, detected and measured in detail by the BATSE instrument of the Compton Gamma-Ray Observatory. In the sample 10 variables, describi…
The data mining: An analysis of 20 eclipsing binary light-curves observed by the INTEGRAL/OMC
P. Zasche
Twenty eclipsing binaries were selected for an analysis from a huge database of observations made by the INTEGRAL/OMC camera. The photometric data were processed and analyzed, resu…
Period changes in six contact binaries: WZ And, V803 Aql, DF Hya, PY Lyr, FZ Ori, and AH Tau
P. Zasche, A. Liakos, P. Niarchos +3
Six contact binaries lacking a period analysis have been chosen to search for the presence of a third body. The O-C diagrams of these binaries were analyzed with the least-squares…
Transient jets in the symbiotic prototype Z Andromedae
A. Skopal, T. Pribulla, J. Budaj +6
We present development of the collimated bipolar jets from the symbiotic prototype Z And that appeared and disappeared during its 2006 outburst. In 2006 July Z And reached its hist…
The energy spectrum of cosmic-ray electrons at TeV energies
H. E. S. S. Collaboration, :, F. Aharonian
The very large collection area of ground-based gamma-ray telescopes gives them a substantial advantage over balloon/satellite based instruments in the detection of very-high-energy…
Evidence for the decay B_s^0 --> D_s^(*)D_s^(*) and a measurement of Delta_Gamma_s^CP/Gamma_s
D0 Collaboration, V. M. Abazov
We search for the semi-inclusive process B_s^0 --> D_s^(*)D_s^(*) using 2.8 fb^-1 of ppbar collisions at s^(1/2) = 1.96 TeV recorded by the D0 detector operating at the Fermilab Te…