10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT5.2k papers
- Centre National de la Recherche ScientifiqueFR4.2k papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR3.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT3.1k papers
- Sapienza University of RomeIT2.9k papers
- European Organization for Nuclear ResearchCH2.9k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT2.9k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2.7k papers
- The Ohio State UniversityUS2.7k papers
- University of PisaIT2.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT2.6k papers
- National and Kapodistrian University of AthensGR2.5k papers
48 papers · 1 filter
Radio Observations of the Marano Field and the Faint Radio Galaxy Population
Carlotta Gruppioni, Gianni Zamorani, Hans R. de Ruiter +2
Radio surveys with the Australia Telescope Compact Array have been carried out at 1.4 and 2.4 GHz with a limiting flux of 0.2 mJy at each frequency in the Marano Field, in which de…
Dynamical Lorentz Symmetry Breaking from 3 + 1 Renormalizable Model with Wess-Zumino Interaction
A. A. Andrianov, R. Soldati
We study the renormalizable abelian vector-field models in the presence of the Wess-Zumino interaction with the pseudoscalar matter. The renormalizability is achieved by supplement…
X-ray emission and internal kinematics in early-type galaxies. I. Observations
S. Pellegrini, E. V. Held, L. Ciotti
Long slit spectroscopic data for 7 early-type galaxies with X-ray emission have been analyzed to derive velocity dispersion and radial velocity profiles. Major axis rotation curves…
Semiclassical Collapse of a Sphere of Dust and Hawking Radiation
Roberto Casadio
The independent dynamical variables of a collapsing homogeneous sphere of dust are canonically quantised and coupled equations describing matter (dust) and gravitation are obtained…
Stellar systems following the R^{1/m} luminosity law. II Anisotropy, velocity profiles, and the FP of elliptical galaxies
L. Ciotti, B. Lanzoni
We study the dynamical properties of spherical galaxies with surface luminosity profile described by the R^{1/m}-law, in which a variable degree of orbital anisotropy is allowed. T…
ASCA and ROSAT X-ray Spectra of High-Redshift Radio-Loud Quasars
M. Cappi, M. Matsuoka, A. Comastri +4
Results are presented on the X-ray properties of 9 high-redshift (1.2 < z < 3.4) radio-loud quasars (RLQs) observed by ASCA (10 observations) and ROSAT (11 observations, for a subs…
A New Phase Diagram for the t-J Model
Elisa Ercolessi, Pierbiagio Pieri, Marco Roncaglia
We study the so-called nonmagnetic phases (dimer and flux states) in the t-J model below half filling. We present a new phase diagram, at zero and finite temperature, that includes…
Trilinear anomalous gauge couplings and non-standard fermionic couplings
R. Casalbuoni, S. De Curtis, D. Guetta
In this paper we do an analysis of the reaction for various options of the Next Linear Colliders (NLC), by considering the possibility of deviations from the Sta…
Effective actions for spin ladders
S. Dell'Aringa, E. Ercolessi, G. Morandi +2
We derive a path-integral expression for the effective action in the continuum limit of an AFM Heisenberg spin ladder with an arbitrary number of legs. The map is onto an no…
Numerical results for generalized RVB wavefunctions
G. Fano, F. Ortolani, L. Ziosi
Numerical results are presented for a generalized resonance valence bond state which includes both ionic and covalent contributions in each bond ; non nearest-neighbor bonds are al…
On the metallicity distribution in the nuclei of elliptical galaxies
L. Greggio
Using current models of spectrophotometric properties of single age, single metallicity stellar populations I have computed the Mg2, Hbeta, Fe52 and Fe53 line strengths for stellar…
Variationnal study of ferromagnetism in the t1-t2 Hubbard chain
S. Daul, P. Pieri, M. Dzierzawa +2
A one-dimensional Hubbard model with nearest and (negative) next-nearest neighbour hopping is studied variationally. This allows to exclude saturated ferromagnetism for .…
Measurement of Dijet Angular Distributions at CDF
F. Abe
We have used 106 pb^-1 of data collected in proton-antiproton collisions at sqrt(s)=1.8 TeV by the Collider Detector at Fermilab to measure jet angular distributions in events with…
Disturbance propagation in chaotic extended systems with long-range coupling
Alessandro Torcini, Stefano Lepri
Propagation of initially localized perturbations is investigated in chaotic coupled map lattices with long-range couplings decaying as a power of the distance. The initial perturba…
The Iron Discrepancy in Elliptical Galaxies after ASCA
Nobuo Arimoto, Kyoko Matsushita, Yuhri Ishimaru +2
We present estimates for the iron content of the stellar and diffused components of elliptical galaxies, as derived respectively from integrated optical spectra and from ASCA X-ray…
Nonperturbative evaluation of a field correlator appearing in the heavy quarkonium system
M. Baker, J. S. Ball, N. Brambilla +1
Recently an electric and magnetic field correlator appearing in the description of the heavy quarkonium system was evaluated on the lattice. Here, we give a nonperturbative analyti…
Excited State Destri - De Vega Equation for Sine-Gordon and Restricted Sine-Gordon Models
D. Fioravanti, A. Mariottini, E. Quattrini +1
We derive a generalization of the Destri - De Vega equation governing the scaling functions of some excited states in the Sine-Gordon theory. In particular configurations with an e…
BHAGEN-1PH: A Monte Carlo event generator for radiative Bhabha scattering
M. Caffo, H. Czyz
BHAGEN-1PH is a FORTRAN program providing fast Monte Carlo event generation of the process , within electroweak theory, for both unpolarized beams and also f…
CCD photometry of the old open cluster Collinder 261
E. Gozzoli, M. Tosi, G. Marconi +1
We present UBVI photometry for the old open cluster Collinder 261. From comparison of the observed colour-magnitude diagrams with simulations based on stellar evolutionary models w…
Can Flat Spectrum Radio Quasars make most of the overall gamma--ray background ?
A. Comastri, T. Di Girolamo, G. Setti
The contribution of discrete sources to the gamma--ray background is modeled. Flat spectrum radio quasars are known to make a substantial contribution to the hard (E > 100 MeV) bac…
New data on OZI rule violation in bar{p}p annihilation at rest
OBELIX Collaboration
The results of a measurement of the ratio R = Y(phi pi+ pi-) / Y(omega pi+ pi-) for antiproton annihilation at rest in a gaseous and in a liquid hydrogen target are presented. It w…
Two-dimensional black holes in accelerated frames: quantum aspects
R. Balbinot, A. Fabbri
By considering charged black hole solutions of a one parameter family of two dimensional dilaton gravity theories, one finds the existence of quantum mechanically stable gravitatio…
The radio and X-ray properties of Abell 2255
L. Feretti, H. Boehringer, G. Giovannini +1
New radio and X-ray data are reported for the rich cluster Abell 2255. The cluster radio emission is characterized by the presence of a diffuse halo source, located at the cluster…
Ratios of bottom meson branching fractions involving J/psi mesons and determination of b quark fragmentation fractions
F. Abe
We report a measurement of the ratios of the decay rates of the B^+, B^0 and B^0_s mesons into exclusive final states containing a J/psi meson. The final states were selected from…