3.5k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of ParmaIT415 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano BicoccaIT88 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di FirenzeIT84 papers
- Istituto Nazionale di Fisica NucleareIT68 papers
- Sapienza University of RomeIT61 papers
- Centre National de la Recherche ScientifiqueFR52 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PadovaIT50 papers
- University of PisaIT50 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT49 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT48 papers
- University of FlorenceIT44 papers
- Max Planck Institute for Gravitational PhysicsDE42 papers
20 papers · 1 filter
Non-linear perturbations in scalar-tensor cosmologies
F. Perrotta, S. Matarrese, M. Pietroni +1
Can local fluctuations of a ``Quintessence'' scalar field play a dynamical role in the gravitational clustering and cosmic structure formation process? We address this question in…
Classical Solutions of the TEK Model and Noncommutative Instantons in Two Dimensions
Luca Griguolo, Domenico Seminara
The twisted Eguchi-Kawai (TEK) model provides a non-perturbative definition of noncommutative Yang-Mills theory: the continuum limit is approached at large by performing suitab…
Full O(alpha_S) Evaluation for b->s+gamma Transverse Momentum Distribution
U. Aglietti, R. Sghedoni, L. Trentadue
The full O(alpha_S) transverse momentum distribution for the b -> s+gamma decay is computed. Results are presented in analytic form. An improved expression for the coefficient func…
Non perturbative study of QCD on a 2+2 anisotropic lattice
Giuseppe Burgio, Alessandra Feo, Mike Peardon +1
We present preliminary results for a non perturbative determination of the parameters in the action required to restore Lorentz invariance in long distance correlators, using the s…
The Study of the Continuum Limit of the Supersymmetric Ward-Takahashi Identity for N=1 Super Yang-Mills Theory
A. Feo
The one-loop corrections to the supersymmetric Ward-Takahashi identity (WTi) are investigated in the off-shell regime in the Wilson formulation of the discretized N=1 Super Yang-Mi…
Transverse Momentum Distribution in b-> s Gamma
R. Sghedoni
We present the complete calculation of the transverse momentum distribution for the decay b->s Gamma. The contributions of the leading operator O_7 are computed: infrared logarithm…
Four loop stochastic perturbation theory in 3d SU(3)
F. Di Renzo, A. Mantovi, V. Miccio +1
Dimensional reduction is a key issue in finite temperature field theory. For example, when following the QCD Free Energy from low to high scales across the critical temperature, ul…
Preliminary results in unquenched Numerical Stochastic Perturbation Theory
F. Di Renzo, A. Mantovi, V. Miccio +1
Introducing fermionic loops contributions in Numerical Stochastic Perturbation Theory was mainly motivated by the proposal to compute 2-3 loops for renormalization constants (and i…
Perturbative and non-perturbative aspects of heavy-quark fragmentation
Einan Gardi, Matteo Cacciari
We describe a new approach to heavy-quark fragmentation which is based on a resummed perturbative calculation and parametrization of power corrections, concentrating on the z -> 1…
The massless two-loop two-point function
Isabella Bierenbaum, Stefan Weinzierl
We consider the massless two-loop two-point function with arbitrary powers of the propagators and derive a representation, from which we can obtain the Laurent expansion to any des…
An eigenvalue problem related to the non-linear sigma-model: analytical and numerical results
V. A. Fateev, E. Onofri
An eigenvalue problem relevant for non-linear sigma model with singular metric is considered. We prove the existence of a non-degenerate pure point spectrum for all finite values o…
Subtraction terms for one-loop amplitudes with one unresolved parton
Stefan Weinzierl
Fully differential next-to-next-to-leading order calculations require a method to cancel infrared singularities. In a previous publication, I discussed the general setup for the su…
Charm Cross Sections for the Tevatron Run II
Matteo Cacciari, Paolo Nason
We present a calculation of the D^{*+}, D^+ and D^0 meson single inclusive production cross section for the Tevatron Run II. We use the FONLL approach in perturbative QCD, which, b…
Algebraic Algorithms in Perturbative Calculations
Stefan Weinzierl
I discuss algorithms for the evaluation of Feynman integrals. These algorithms are based on Hopf algebras and evaluate the Feynman integral to (multiple) polylogarithms.
The Supersymmetric Ward-Takahashi Identity in 1-Loop Lattice Perturbation Theory. I. General Procedure
Alessandra Feo
The one-loop corrections to the lattice supersymmetric Ward-Takahashi identity (WTi) are investigated in the off-shell regime. In the Wilson formulation of the N=1 supersymmetric Y…
Non-linear gravitational clustering in scalar field cosmologies
S. Matarrese, M. Pietroni, C. Schimd
Non-linear gravitational clustering in a universe dominated by dark energy, modelled by a `quintessence' scalar field, and cold dark matter with space-time varying mass is studied.…
gTybalt - a free computer algebra system
Stefan Weinzierl
This article documents the free computer algebra system "gTybalt". The program is build on top of other packages, among others GiNaC, TeXmacs and Root. It offers the possibility of…
Gauge Theories on a 2+2 Anisotropic Lattice
Giuseppe Burgio, Alessandra Feo, Mike Peardon +1
The implementation of gauge theories on a four-dimensional anisotropic lattice with two distinct lattice spacings is discussed, with special attention to the case where two axes ar…
Subtraction terms at NNLO
Stefan Weinzierl
Perturbative calculations at next-to-next-to-leading order for multi-particle final states require a method to cancel infrared singularities. I discuss the subtraction method at NN…
Heavy-Quark Fragmentation
Matteo Cacciari, Einan Gardi
We study perturbative and non-perturbative aspects of heavy-quark fragmentation into hadrons, emphasizing the large-x region, where x is the energy fraction of the detected hadron.…