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
58 papers · 1 filter
BeppoSAX observations of low power radio galaxies: possible detection of obscured nuclei
E. Trussoni, F. Vagnetti, S. Massaglia +6
We present the first results of BeppoSAX observations of a small sample of low brightness FRI radio galaxies. The flux of all the targets is consistent with a thermal spectrum, as…
ASCA detection of the FeK edge in the spectrum of the Seyfert 2 galaxy IRAS 04575-7537: a sign of a complex absorber
C. Vignali, A. Comastri, G. M. Stirpe +5
ASCA X-ray spectral analysis of the Seyfert 2 galaxy IRAS 04575-7537 is presented. The main result is the presence of a significant iron edge at a rest energy of 7.13^+0.21_-0.16 k…
Observation of Hadronic W Decays in t-tbar Events with the Collider Detector at Fermilab
F. Abe
We observe hadronic W decays in t-tbar -> W (-> l nu) + >= 4 jet events using a 109 pb-1 data sample of p-pbar collisions at sqrt{s} = 1.8 TeV collected with the Collider Detector…
Differential Equations for Feynman Graph Amplitudes
Ettore Remiddi
It is by now well established that, by means of the integration by part identities, all the integrals occurring in the evaluation of a Feynman graph of given topology can be expres…
Large bent jets in the inner region of CSSs
F. Mantovani, W. Junor, M. Bondi +5
The class of Compact Steep-spectrum Sources is dominated by double-lobed objects (70%). The remaining 30% are jet-dominated objects, with the jet brightened either by Doppler boost…
Measurement of the B0 B0-bar oscillation frequency using pi-B meson charge-flavor correlations in p p-bar collisions at sqrt{s} = 1.8 TeV
CDF Collaboration, F. Abe et. al
We present a measurement of the B0 B0-bar oscillation frequency using a flavor tagging method based on correlations of B meson flavor with the charge of other particles produced in…
Chaotic inflation with a scalar field in non-classical states
F. Finelli, G. P. Vacca, G. Venturi
We study chaotic inflation driven by a real, massive, homogeneous minimally coupled scalar field in a flat Robertson-Walker spacetime. The semiclassical limit for gravity is consid…
Relative Sizes of X-ray and Optical Images of Elliptical Galaxies; Correlation with X-ray Luminosity
William G. Mathews, Fabrizio Brighenti
Optical parameters of elliptical galaxies are tightly correlated, but their x-ray parameters vary widely. The x-ray luminosity L_x ranges over more than an order of magnitude for e…
Triple pomeron vertex in the limit Nc to infinity
M. A. Braun, G. P. Vacca
In the hard pomeron theory with the number of colours Nc in the infinity limit the diffractive amplitude obtained in [3] is compared with the results found for Nc=3 in [1] and in t…
The optical light curve of GRB 970228 refined
N. Masetti, C. Bartolini, A. Guarnieri +1
We present the R and V light curves of the optical counterpart of GRB 970228. A critical analysis of all the available data is made in light of the results achieved in the recent G…
BeppoSAX observation of NGC 7674: a new reflection-dominated Seyfert 2 galaxy
G. Malaguti, G. G. C. Palumbo, M. Cappi +6
The Seyfert 2 galaxy NGC 7674 has been observed within the BeppoSAX Core Programme with the onboard narrow field instruments between 0.1 and 100 keV. The broad-band spectrum shows…
A possible orbital period for the dwarf nova V1101 Aql
Nicola Masetti, Massimo Della Valle
We have performed a Discrete Fourier Transform on 136 CCD B, V and R frames of the Z Cam-type dwarf nova V1101 Aql. Our analysis indicates as possible orbital period P_orb =3.46 ho…
Optical observations in the field of GRB 970111
N. Masetti, C. Bartolini, A. Guarnieri +1
B, V and R optical photometry performed on the field of the GRB 970111 soon after its detection by BeppoSAX is presented. No remarkable optical object is found inside the corrected…
Did GRB 970228 and GRB 970508 present similar optical properties?
C. Bartolini, G. M. Beskin, A. Guarnieri +2
The analysis of the light curves of the optical counterparts of GRB 970228 and GRB 970508 points out remarkable similarities. The spectral distribution obtained from the color indi…
On the nature of the X-ray absorption in the Seyfert 2 galaxy NGC 4507
A. Comastri, C. Vignali, M. Cappi +4
We present results of the ASCA observation of the Seyfert 2 galaxy NGC 4507. The 0.5-10 keV spectrum is rather complex and consists of several components: (1) a hard X-ray power la…
A search for variability in Narrow Line Seyfert 1 Galaxies. II. New data from the Loiano monitoring programme
M. Ester Giannuzzo, Marco Mignoli, Giovanna M. Stirpe +1
We present part of the results from a spectroscopic monitoring programme on a sample of AGNs, relative to Narrow Line Seyfert 1 Galaxies: following the idea that Balmer-line variab…
Interacting Boson Model plus broken-pairs description of high-spin dipole bands
D. Vretenar, S. Brant, G. Bonsignori +2
The Interacting Boson Model with broken-pairs has been extended to include mixed proton-neutron configurations in the fermion model space. The extended version of the model has bee…
Recent X-ray Observations and the Evolution of Hot Gas in Elliptical Galaxies: Evidence for Circumgalactic Gas
Fabrizio Brighenti, William G. Mathews
X-ray emitting gaseous halos, such as that in elliptical galaxies like NGC 4472, cannot have been produced solely from gas expelled from galactic stars. In traditional models for t…
Broken Pairs and High-Spin States in Transitional Nuclei
G. Bonsignori, D. Vretenar, S. Cacciamani +1
The Interacting Boson plus broken-pairs Model has been used to describe high-spin bands in spherical and transitional nuclei. In the spherical nucleus Cd the model reproduc…
Measurement of the t-tbar Production Cross Section in p-pbar Collisions at sqrt(s)=1.8 TeV
F. Abe
We present a measurement of the t-tbar cross section in p-pbar collisions at sqrt(s)=1.8 TeV using an integrated luminosity of 109 pb-1 collected with the Collider Detector at Ferm…
Stellar Yields and Chemical Evolution I: Abundance Ratios and Delayed Mixing in the Solar Neighbourhood
D. Thomas, L. Greggio, R. Bender
We analyse two recent computations of type II supernova nucleosynthesis by Woosley & Weaver (1995, WW95) and Thielemann, Nomoto, & Hashimoto (1996, TNH96), focusing on the ability…
VLBI Observations of a Complete Sample of Radio Galaxies: VIII - Proper Motion in 3C338
G. Giovannini, W. D. Cotton, L. Feretti +2
We present new VLA, MERLIN and VLBI images for the radio galaxy 3C 338, and the results of the monitoring of its arcsecond core flux density. Present high sensitivity observations…
Properties of Jets in W Boson Events from 1.8 TeV pbar p Collisions
CDF Collaboration
We present a study of events with W bosons and hadronic jets produced in pbar p collisions at a center of mass energy of 1.8 TeV. The data consist of 51400 W^+/- -> e^+/- nu decay…
An Infinite Step Billiard
Mirko Degli Esposti, Gianluigi Del Magno, Marco Lenci
A class of non-compact billiards is introduced, namely the infinite step billiards, i.e., systems of a point particle moving freely in the domain $Ω= \bigcup_{n\in\N} [n,n+1] \time…