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13 papers · 2 filters
Equivalence Postulate and the Quantum Potential of Two Free Particles
Marco Matone
Commutativity of the diagram of the maps connecting three one--particle state, implied by the Equivalence Postulate (EP), gives a cocycle condition which unequivocally leads to the…
Seiberg--Witten Duality in Dijkgraaf--Vafa Theory
Marco Matone
We show that a suitable rescaling of the matrix model coupling constant makes manifest the duality group of the N=2 SYM theory with gauge group SU(2). This is done by first identif…
Equivalent effective Lagrangians for Scherk-Schwarz compactifications
Carla Biggio, Ferruccio Feruglio, Andrea Wulzer +1
We discuss the general form of the mass terms that can appear in the effective field theories of coordinate-dependent compactifications a la Scherk-Schwarz. As an illustrative exam…
The Superembedding Origin of the Berkovits Pure Spinor Covariant Quantization of Superstrings
Marco Matone, Luca Mazzucato, Ichiro Oda +2
We show that the pure spinor formalism proposed by Berkovits to covariantly quantize superstrings is a gauge fixed, twisted version of the complexified n=2 superembedding formulati…
Wilson line correlators in two-dimensional noncommutative Yang-Mills theory
A. Bassetto, F. Vian
We study the correlator of two parallel Wilson lines in two-dimensional noncommutative Yang-Mills theory, following two different approaches. We first consider a perturbative expan…
Cutting rules and perturbative unitarity of noncommutative electric-type field theories from string theory
Alessandro Torrielli
We discuss the breakdown of perturbative unitarity of noncommutative quantum field theories in electric-type background in the light of string theory. We consider the analytic stru…
Symmetry Breaking for Bosonic Systems on Orbifolds
Carla Biggio, Ferruccio Feruglio
We discuss a general class of boundary conditions for bosons living in an extra spatial dimension compactified on S^1/Z_2. Discontinuities for both fields and their first derivativ…
Scaling properties of the perturbative Wilson loop in two-dimensional non-commutative Yang-Mills theory
A. Bassetto, G. Nardelli, A. Torrielli
Commutative Yang-Mills theories in 1+1 dimensions exhibit an interesting interplay between geometrical properties and U(N) gauge structures: in the exact expression of a Wilson loo…
Isocurvature perturbations in the Ekpyrotic universe
A. Notari, A. Riotto
The Ekpyrotic scenario assumes that our visible Universe is a boundary brane in a five-dimensional bulk and that the hot Big Bang occurs when a nearly supersymmetric five-brane tra…
Radiative Scherk-Schwarz supersymmetry breaking
G. v. Gersdorff, M. Quiros, A. Riotto
We analyze the Scherk-Schwarz (SS) supersymmetry breaking in brane-world five dimensional theories compactified on the orbifold . The SS breaking parameter is und…
NS5-branes in IIA supergravity and gravitational anomalies
Marco Cariglia, Kurt Lechner
We construct a gravitational-anomaly-free effective action for the coupled system of IIA D=10 dynamical supergravity interacting with an NS5-brane. The NS5-brane is considered as e…
The beta function of N=1 SYM in Differential Renormalization
J. Mas, M. Perez-Victoria, C. Seijas
Using differential renormalization, we calculate the complete two-point function of the background gauge superfield in pure N=1 Supersymmetric Yang-Mills theory to two loops. Ultra…
On Anomalies in Orbifold Theories
Luigi Pilo, Antonio Riotto
We study the issue of gauge invariance in five-dimensional theories compactified on an orbifold in the presence of an external U(1) g…