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136 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…
Stability for Rayleigh-Benard convective solutions of the Boltzmann equation
L. Arkeryd, R. Esposito, R. Marra +1
We consider the Boltzmann equation for a gas in a horizontal slab, subject to a gravitational force. The boundary conditions are of diffusive type, specifying the wall temperatures…
New CO detections of lensed submillimeter galaxies in A2218: Probing molecular gas in the LIRG regime at high redshift
K. K. Knudsen, R. Neri, J. -P. Kneib +1
Context: Submillimeter galaxies (SMGs) are distant, dusty galaxies undergoing star formation at prodigious rates. Recently there has been major progress in understanding the nature…
Strong field double ionization : The phase space perspective
François Mauger, Cristel Chandre, Turgay Uzer
We identify the phase-space structures that regulate atomic double ionization in strong ultrashort laser pulses. The emerging dynamical picture complements the recollision scenario…
Triggered star formation on the borders of the Galactic HII region RCW 82
M. Pomares, A. Zavagno, L. Deharveng +6
We are engaged in a multi-wavelength study of several Galactic HII regions that exhibit signposts of triggered star formation on their borders, and where the collect and collapse p…
A unified approach to Mimetic Finite Difference, Hybrid Finite Volume and Mixed Finite Volume methods
Jerome Droniou, Robert Eymard, Thierry Gallouët +1
We investigate the connections between several recent methods for the discretization of anisotropic heterogeneous diffusion operators on general grids. We prove that the Mimetic Fi…
A giant bar induced by a merger event at z=0.4?
Sébastien Peirani, Francois Hammer, Hector Flores +2
(Aims) We present a physical model of the formation of J033239.72-275154.7, a galaxy observed at z=0.41 and characterized by a big young bar of size 6 kpc. The study of this system…
The spatial clustering of X-ray selected AGN in the XMM-COSMOS field
R. Gilli, G. Zamorani, T. Miyaji +70
We study the spatial clustering of 538 X-ray selected AGN in the 2 deg^2 XMM-COSMOS field that are spectroscopically identified to I_{AB}<23 and span the redshift range z=0.2-3.0.…
Monge-Ampère equations in big cohomology classes
S. Boucksom, P. Eyssidieux, V. Guedj +1
We define non-pluripolar products of closed positive currents on a compact Kaehler manifold. We show that a positive non-pluripolar measure can be written in a unique way as the to…
Bottlenecks to vibrational energy flow in OCS: Structures and mechanisms
R. Paškauskas, C. Chandre, T. Uzer
Finding the causes for the nonstatistical vibrational energy relaxation in the planar carbonyl sulfide (OCS) molecule is a longstanding problem in chemical physics: Not only is the…
Gamma-ray burst afterglows : luminosity clustering at infrared wavelengths?
B. Gendre, S. Pelisson, M. Boer +2
Clustering in the luminosity of the afterglows of gamma-ray burst has been reported in the optical and X-ray. We investigate the possibility that a clustering in the luminosity of…
Deep 15um AKARI observations in the CDFS: estimating dust luminosities for a MIR-selected sample and for Lyman Break Galaxies and the evolution of L(dust)/L(UV) with the redshift
Denis Burgarella, Veronique Buat, Tsutomu T. Takeuchi +2
Deep observations of the CDFS have been secured at 15um with AKARI/IRC infrared space telescope (ESA open time). From these observations, we define a sample of MIR-selected galaxie…
Absence of Breakdown of the Poisson Hypothesis I. Closed Networks at Low Load
Alexander Rybko, Senya Shlosman, Alexander Vladimirov
We prove that the general mean-field type networks at low load behave in accordance with the Poisson Hypothesis. That means that the network equilibrates in time independent of its…
Properties of WNh stars in the Small Magellanic Cloud: evidence for homogeneous evolution
F. Martins, D. J. Hillier, J. C. Bouret +4
We derive the physical properties of three WNh stars in the SMC to constrain stellar evolution beyond the main sequence at low metallicity and to investigate the metallicity depend…
Weak-field Hall effect and static polarizability of Bloch electrons
Pavel Streda, Thibaut Jonckheere
A theory of the weak field Hall effect of Bloch electrons based on the analysis of the forces acting on electrons is presented. It is argued that the electric current is composed o…
Limit Theorems and Coexistence Probabilities for the Curie-Weiss Potts Model with an external field
Daniel Gandolfo, Jean Ruiz, Marc Wouts
The Curie-Weiss Potts model is a mean field version of the well-known Potts model. In this model, the critical line is explicitly known and corresponds to a first orde…
Testing gravity on large scales. The skewness of the galaxy distribution at z~1
C. Marinoni, L. Guzzo, A. Cappi +54
We study the evolution of the low-order moments of the galaxy overdensity distribution over the redshift interval 0.7<z<1.5. We find that the variance and the normalized skewness e…
The VVDS-VLA Deep Field - IV: Radio-optical properties
S. Bardelli, E. Zucca, M. Bolzonella +51
(abridged) We use the 1.4 GHz VIMOS-VLA Deep Survey and the optical VVDS and the CFHT-LS to compare the properties of radio loud galaxies with respect to the whole population of op…
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…
Search for the lightest scalar top quark in events with two leptons in ppbar collisions at sqrt(s)=1.96 TeV
D0 Collaboration, V. Abazov
We report results of a search for the pair production of the lightest supersymmetric partner of the top quark using 1 fb-1 of data collected by the D0 detector at a ppbar center-of…
Search for neutral Higgs bosons at high tan(beta) in the b(h/H/A)->btautau channel
D0 Collaboration, V. Abazov
The first search in ppbar collisions at sqrt(s)=1.96 GeV for the production of neutral Higgs bosons in association with bottom quarks and decaying in two tau leptons is presented.…
Criticality in multicomponent spherical models : results and cautions
Jean-Noël Aqua, Michael E. Fisher
To enable the study of criticality in multicomponent fluids, the standard spherical model is generalized to describe an $\ns$-species hard core lattice gas. On introducing $\ns$ sp…
Osmotically driven pipe flows and their relation to sugar transport in plants
K. H. Jensen, E. Rio, R. Hansen +2
In plants, osmotically driven flows are believed to be responsible for translocation of sugar in the pipe-like phloem cell network, spanning the entire length of the plant. In this…
Direct Observation of a Cross-Field Current-Carrying Plasma Rotating Around an Unstable Magnetized Plasma Column
S. Jaeger, Th. Pierre
The low-frequency instability of a magnetized plasma column and the anomalous radial plasma convection are shown to be linked with the existence of a radial cross-field current alo…