2.8k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of MilanIT3.7k papers
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- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT2.4k papers
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20 papers · 2 filters
The nonminimal scalar multiplet coupled to supersymmetric Yang-Mills
Silvia Penati, Daniela Zanon
We consider the coupling of nonminimal scalar multiplets to supersymmetric Yang-Mills in four dimensions and compute the one-loop contribution to the low-energy effective action in…
On the Evaluation of Compton Scattering Amplitudes in String Theory
A. Pasquinucci, M. Petrini
We consider the Compton amplitude for the scattering of a photon and a (massless) ``electron/positron'' at one loop (i.e. genus one) in a four-dimensional fermionic heterotic strin…
The nonminimal scalar multiplet: duality, sigma-model, beta-function
Silvia Penati, Andrea Refolli, Antoine Van Proeyen +1
We compute in superspace the one-loop beta-function for the nonlinear sigma-model defined in terms of the nonminimal scalar multiplet. The recently proposed quantization of this co…
Hard-Soft Renormalization and the Exact Renormalization Group
M. Pernici, M. Raciti, F. Riva
The Wilsonian exact renormalization group gives a natural framework in which ultraviolet and infrared divergences can be treated separately. In massless QED we introduce, as the on…
D0-Branes, Constrained Instantons and D=4 Super Yang-Mills Theories
J. L. F. Barbon, A. Pasquinucci
We consider in more detail the role of D0-branes as instantons in the construction of SU(N) Super Yang-Mills and Super QCD theories in four space-time dimensions with D4, D6 and NS…
Schwinger-Dyson Equation, Area Law and Chiral Symmetry in QCD
G. M. Prosperi
A Schwinger-Dyson equation for the quark propagator is derived in the context of a Bethe-Salpeter second order formalism developped in preceding papers and of the Minimal Area Law…
On the Compton Scattering in String Theory
A. Pasquinucci, M. Petrini
We explicitly compute the Compton amplitude for the scattering of a photon and a (massless) ``electron/positron'' at tree level and one loop, in a four-dimensional fermionic hetero…
Insights and Puzzles from Branes: 4d SUSY Yang-Mills from 6d Models
A. Marshakov, M. Martellini, A. Morozov
5-branes of nontrivial topology are associated in the Diaconescu-Hanany-Witten-Witten (DHWW) approach with the Seiberg-Witten (SW) theory of low-energy effective actions. There are…
The N=2 Super Yang-Mills Low-Energy Effective Action at Two Loops
A. De Giovanni, M. T. Grisaru, M. Rocek +2
We have carried out a two loop computation of the low-energy effective action for the four-dimensional N=2 supersymmetric Yang-Mills system coupled to hypermultiplets, with the chi…
BRST Symmetries for the Tangent Gauge Group
A. S. Cattaneo, P. Cotta-Ramusino, M. Rinaldi
For any principal bundle , one can consider the subspace of the space of connections on its tangent bundle given by the tangent bundle of the space of connectio…
Algebraic renormalization of the BF Yang-Mills Theory
F. Fucito, M. Martellini, S. P. Sorella +3
We discuss the quantum equivalence, to all orders of perturbation theory, between the Yang-Mills theory and its first order formulation through a second rank antisymmetric tensor f…
Four-Dimensional Yang-Mills Theory as a Deformation of Topological BF Theory
A. S. Cattaneo, P. Cotta-Ramusino, F. Fucito +4
The classical action for pure Yang--Mills gauge theory can be formulated as a deformation of the topological theory where, beside the two-form field , one has to add one ex…
Infrared Stability of N=4 Super Yang-Mills Theory
Michela Petrini
We study the infrared perturbative properties of a class of non supersymmetric gauge theories with the same field content of N=4 Super Yang-Mills and we show that the N=4 supersymm…
Cohomology and Renormalization of BFYM Theory in three Dimensions
Alberto Accardi, Andrea Belli, Maurizio Martellini +1
The first order formalism for 3D Yang-Mills theory is considered and two different formulations are introduced, in which the gauge theory appears to be a deformation of the topolog…
Quantization of the complex linear superfield
M. Grisaru, A. Van Proeyen, D. Zanon
The quantization of the complex linear superfield requires an infinite tower of ghosts. We use the Batalin-Vilkovisky method to obtain a gauge-fixed action. In superspace, the meth…
On the Scattering of Gravitons on Two Parallel D-Branes
A. Pasquinucci
I discuss the scattering of a graviton (or a dilaton, or an anti-symmetric tensor) on two parallel static Dp-branes. The graviton belongs to a type II string in 10D.
Gravitational Dressing of N=2 Sigma-Models Beyond Leading Order
S. Penati, A. Santambrogio, D. Zanon
We study the beta-function of the N=2 sigma-model coupled to N=2 induced supergravity. We compute corrections to first order in the semiclassical limit, , beyond one…
Feynman rules and beta-function for the BF Yang-Mills Theory
Maurizio Martellini, Mauro Zeni
Yang-Mills theory in the first order formalism appears as the deformation of a topological field theory, the pure BF theory. We discuss this formulation at the quantum level, givin…
On the Ground State of Quantum Gravity
S. Cacciatori, G. Preparata, S. Rovelli +2
In order to gain insight into the possible Ground State of Quantized Einstein's Gravity, we have devised a variational calculation of the energy of the quantum gravitational field…
Non linear integral equation and excited--states scaling functions in the sine-Gordon model
C. Destri, H. J. de Vega
The NLIE (the non-linear integral equation equivalent to the Bethe Ansatz equations for finite size) is generalized to excited states, that is states with holes and complex roots o…