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50 papers · 1 filter
Testing for monotonicity in the Hubble diagram
Nicolai Meinshausen, John Rice, Thomas Schücker
General relativistic kinematics and the cosmological principle alone imply a monotonicity constraint in the Hubble diagram, which we confront to present-day supernova data. We use…
Search for techniparticles in e +jets events at D0
D0 Collaboration, V. Abazov
We search for the technicolor process ppbar -> rho_T/omega_T ->W+pi_T in events containing one electron and two jets, in data corresponding to an integrated luminosity of 390 pb-1,…
Normal automorphisms of a free metabelian nilpotent group
G. Endimioni
An automorphism of a group is said to be normal if it preserves each normal subgroup. In this paper, we determine the normal automorphisms of a free metabelian nilpotent group.
Proper pseudo-holomorphic maps between strictly pseudoconvex regions
Léa Blanc-Centi
We prove that proper pseudo-holomorphic maps between strictly pseudoconvex regions in almost complex manifolds extend to the boundary. The key point is that the Jacobian is far fro…
Search for single production of scalar leptoquarks in p\bar{p} collisions decaying into muons and quarks with the D0 detector
D0 Collaboration, V. Abazov
We report on a search for second generation leptoquarks LQ_2 which decay into a muon plus quark in p\bar{p} collisions at a center-of-mass energy of sqrt{s} = 1.96 TeV in the D0 de…
Studying the Evolution of Multi-Wavelength Emissivities with the Vimos VLT Deep Survey
L. Tresse, O. Ilbert, E. Zucca +4
The VIMOS VLT Deep Survey is a unique I-selected spectroscopic sample to study galaxies all the way from z=5 to z=0. We recapitulate the first results about the evolution of the ga…
Risk hull method and regularization by projections of ill-posed inverse problems
L. Cavalier, Yu. Golubev
We study a standard method of regularization by projections of the linear inverse problem , where is a white Gaussian noise, and is a known compact operator with si…
Metastability in Interacting Nonlinear Stochastic Differential Equations I: From Weak Coupling to Synchronisation
Nils Berglund, Bastien Fernandez, Barbara Gentz
We consider the dynamics of a periodic chain of N coupled overdamped particles under the influence of noise. Each particle is subjected to a bistable local potential, to a linear c…
Quenched invariance principles for random walks with random conductances
P. Mathieu
We prove an almost sure invariance principle for a random walker among i.i.d. conductances in , . We assume conductances are bounded from above but we dot require th…
Finite size effects, super-and sub-poissonian noise in a nanotube connected to leads
Marine Guigou, Alexandre Popoff, Thierry Martin +1
The injection of electrons in the bulk of carbon nanotube which is connected to ideal Fermi liquid leads is considered. While the presence of the leads gives a cancellation of the…
Almost-Commutative Geometry, massive Neutrinos and the Orientability Axiom in KO-Dimension 6
Christoph A. Stephan
In recent publications Alain Connes [1] and John Barrett [2] proposed to change the KO-dimension of the internal space of the standard model in its noncommutative representation [3…
Positive recurrence of processes associated to crystal growth models
E. D. Andjel, M. V. Menshikov, V. V. Sisko
We show that certain Markov jump processes associated to crystal growth models are positive recurrent when the parameters satisfy a rather natural condition.
Electromigration-Induced Step Meandering on Vicinal Surfaces: Nonlinear Evolution Equation
Matthieu Dufay, Jean-Marc Debierre, Thomas Frisch
We study the effect of a constant electrical field applied on vicinal surfaces such as the Si surface. An electrical field parallel to the steps induces a meandering instabi…
The type Ia supernova SNLS-03D3bb from a super-Chandrasekhar-mass white dwarf star
D. Andrew Howell, Mark Sullivan, Peter E. Nugent +14
The acceleration of the expansion of the universe, and the need for Dark Energy, were inferred from the observations of Type Ia supernovae (SNe Ia). There is consensus that SNe Ia…
-trees and laminations for free groups I: Algebraic laminations
Thierry Coulbois, Arnaud Hilion, Martin Lustig
This paper is the first of a sequence of three papers, where the concept of an -tree dual to a measured geodesic lamination in a hyperbolic surface is generalized to arb…
Measurement of the top quark mass in the dilepton channel
D0 Collaboration, V. Abazov et al
We present a measurement of the top quark mass in the dilepton channel based on approximately 370/pb of data collected by the D0 experiment during Run II of the Fermilab Tevatron c…
Fermions in three-dimensional spinfoam quantum gravity
Winston Fairbairn
We study the coupling of massive fermions to the quantum mechanical dynamics of spacetime emerging from the spinfoam approach in three dimensions. We first recall the classical the…
The cosmic star formation rate evolution from z=5 to z=0 from the VIMOS VLT Deep Survey
L. Tresse, O. Ilbert, E. Zucca +45
We present the evolution of the comoving SFR density in the redshift range 0 < z < 5 using the first epoch data release of the VVDS, that is 11564 spectra selected at I_AB=24 over…
Channeling chaotic transport in a wave-particle experiment
Alessandro Macor, Fabrice Doveil, Cristel Chandre +3
A numerical and experimental study of a control method aimed at channeling chaos by building barriers in phase space is performed on a paradigm for wave-particle interaction, i.e.,…
Rearrangement inequalities and applications to isoperimetric problems for eigenvalues
Francois Hamel, Nikolai Nadirashvili, Emmanuel Russ
Let be a bounded domain in , and let be the Euclidean ball centered at 0 and having the same Lebesgue measure as . Consider the operator $L=-÷(A\nab…
Measurement of the ratios of the Z/G* + >= n jet production cross sections to the total inclusive Z/G* cross section in ppbar collisions at sqrt(s) = 1.96 TeV
D0 Collaboration, V. Abazov
We present a study of events with Z bosons and jets produced at the Fermilab Tevatron Collider in ppbar collisions at a center of mass energy of 1.96 TeV. The data sample consists…
Search for pair production of scalar bottom quarks in ppbar collisions at sqrt(s)=1.96 TeV
D0 Collaboration, V. M Abazov
A search for direct production of scalar bottom quarks (sb) is performed with 310 pb-1 of data collected by the DO experiment in ppbar collisions at sqrt(s)=1.96 TeV at the Fermila…
The VIMOS VLT Deep Survey:The ultraviolet galaxy luminosity function and luminosity density at 3<z<4
S. Paltani, O. Le Fevre, O. Ilbert +46
We study the LF of the high-z galaxy population with 3<z<4 using a purely I-band magnitude-selected spectroscopic sample obtained in the framework of the VVDS. We determine the LF…
Heat kernel and number theory on NC-torus
V. Gayral, B. Iochum, D. V. Vassilevich
The heat trace asymptotics on the noncommutative torus, where generalized Laplacians are made out of left and right regular representations, is fully determined. It turns out that…