Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Istituto Nazionale di Fisica Nucleare, Roma Tor VergataIT2.7k papers
- Centre National de la Recherche ScientifiqueFR2.4k papers
- Sapienza University of RomeIT2.3k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT2.1k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR1.9k papers
- University of CambridgeGB1.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT1.6k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT1.6k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR1.6k papers
- University of GlasgowGB1.5k papers
- University of PisaIT1.5k papers
- University of EdinburghGB1.5k papers
92 papers · 1 filter
Color Variability of AGNs
F. Vagnetti, D. Trevese
Optical spectral variability of quasars and BL Lac Objects is compared by means of the spectral variability parameter beta (Trevese & Vagnetti 2002). Both kinds of objects change t…
Calabi-Yau Fourfolds with Flux and Supersymmetry Breaking
Marcus Berg, Michael Haack, Henning Samtleben
In Calabi-Yau fourfold compactifications of M-theory with flux, we investigate the possibility of partial supersymmetry breaking in the three-dimensional effective theory. To this…
Holography and Infrared Conformality in Two Dimensions
Marcus Berg
This is a very brief review of some results from hep-th/0112154 and hep-th/0209191. In holographic renormalization, we studied the RG flow of a 2d N=(4,4) CFT perturbed by a releva…
Magnetized Type I Orbifolds in Four Dimensions
Marianna Larosa
I review the basic features of four dimensional Z_2 x Z_2 (shift) orientifolds with internal magnetic fields, describing two examples with N=1 supersymmetry. As in the correspondin…
The Cosmic-Ray Proton and Helium Spectra measured with the CAPRICE98 balloon experiment
M. Boezio, V. Bonvicini, P. Schiavon +36
A new measurement of the primary cosmic-ray proton and helium fluxes from 3 to 350 GeV was carried out by the balloon-borne CAPRICE experiment in 1998. This experimental setup comb…
On-Site Repulsion as the Source of Pairing in Carbon Nanotubes and Intercalated Graphite
Enrico Perfetto, Gianluca Stefanucci, Michele Cini
We show that different non-conventional superconductors have one fundamental feature in common: pair eigenstates of the Hamiltonian are repulsion-free, the W=0 pairs. In extended H…
On the geometry of higher-spin gauge fields
D. Francia, A. Sagnotti
We review a recent construction of the free field equations for totally symmetric tensors and tensor-spinors that exhibits the corresponding linearized geometry. These equations ar…
A Converse Hawking-Unruh Effect and dS^2/CFT Correspondance
Daniele Guido, Roberto Longo
Given a local quantum field theory net A on the de Sitter spacetime dS^d, where geodesic observers are thermalized at Gibbons-Hawking temperature, we look for observers that feel t…
Spectral Slope Variability of BL Lac Objects in the Optical Band
Fausto Vagnetti, Dario Trevese, Roberto Nesci
Light curves of eight BL Lac objects in the BVRI bands have been analyzed. All of the objects tend to be bluer when brighter. However spectral slope changes differ quantitatively f…
Geometry of contours and Peierls estimates in d=1 Ising models
M. Cassandro, P. A. Ferrari, I. Merola +1
Following Fröhlich and Spencer, we study one dimensional Ising spin systems with ferromagnetic, long range interactions which decay as , . We introdu…
A Gibbs-like measure for single-time, multi-scale energy transfer in stochastic signals and Shell Model of turbulence
Roberto Benzi, Luca Biferale, Mauro Sbragaglia
A Gibbs-like approach for simultaneous multi-scale correlation functions in random, time-dependent, multiplicative processes for the turbulent energy cascade is investigated. We st…
Classical gauge instantons from open strings
M. Billo, M. Frau, F. Fucito +3
We study the D3/D(-1) brane system and show how to compute instanton corrections to correlation functions of gauge theories in four dimensions using open string techniques. In part…
Antimatter research in Space
Piergiorgio Picozza, Aldo Morselli
Two of the most compelling issues facing astrophysics and cosmology today are to understand the nature of the dark matter that pervades the universe and to understand the apparent…
Diffusive transport and self-consistent dynamics in coupled maps
Guido Boffetta, Diego del-Castillo-Negrete, Cristobal Lopez +2
The study of diffusion in Hamiltonian systems has been a problem of interest for a number of years. In this paper we explore the influence of self-consistency on the diffusion prop…
Marginal Fermi liquid behaviour in the d=2 Hubbard model with cut-off
V. Mastropietro
We consider the half-filled Hubbard model with a cut-off forbidding momenta close to the angles of the square shaped Fermi surface. By Renormalization Group methods we find a conve…
The Disc-Jet Relation in Strong-Lined Blazars
V. D'Elia, P. Padovani, H. Landt
The relation between accretion disc (thermal emission) and jet (non-thermal emission) in blazars is still a mystery as, typically, the beamed jet emission swamps the disc even in t…
Multiple Methods for Estimating the Bispectrum of the Cosmic Microwave Background with Application to the MAXIMA Data
M. G. Santos, A. Heavens, A. Balbi +11
We describe different methods for estimating the bispectrum of Cosmic Microwave Background data. In particular we construct a minimum variance estimator for the flat-sky limit and…
Intermittency in Turbulence: Multiplicative random process in space and time
Roberto Benzi, Luca Biferale, Federico Toschi
We present a simple stochastic algorithm for generating multiplicative processes with multiscaling both in space and in time. With this algorithm we are able to reproduce a synthet…
Multi-Instanton Calculus and Equivariant Cohomology
Ugo Bruzzo, Francesco Fucito, Jose F. Morales +1
We present a systematic derivation of multi-instanton amplitudes in terms of ADHM equivariant cohomology. The results rely on a supersymmetric formulation of the localization formu…
Search for Dark Matter with GLAST
Aldo Morselli, Andrea Lionetto, Alessandro Cesarini +2
The detection of exotic cosmic rays due to pair annihilation of dark matter particles in the Milky Way halo is a viable techniques to search for supersymmetric dark matter candidat…
Multiwavelength Time Series Data of the LMC Cluster Reticulum
M. Monelli, G. Andreuzzi, G. Bono +11
We present accurate multiwavelength UBVI time series data of the LMC cluster Reticulum. Data cover a time interval of ~ 6 yr and have been collected with SUSI1/2 and SOFI at NTT/ES…
Braiding structures on formal Poisson groups and classical solutions of the QYBE
Fabio Gavarini, Gilles Halbout
If g is a quasitriangular Lie bialgebra, one can asks what is the geometrical meaning of its r-matrix. A first answer was given in a paper by Weinstein and Xu, using purely geometr…
A simple model for drag reduction
Roberto Benzi, Itamar Procaccia
Direct Numerical Simulations established that the FENE-P model of viscoelastic flows exhibits the phenomenon of turbulent drag reduction which is caused in experiments by dilute po…
AGN Feedback on the Intracluster Medium
A. Cavaliere, A. Lapi, N. Menci
Galaxy groups are quite underluminous in X-rays compared to clusters, so the intracluster medium has to be considerably underdense in the former. We consider this to be due to subs…