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Marat Reyes (UBB)12/06/2019, 14:00
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Cristian Villavicencio12/06/2019, 14:25
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Danilo Diaz12/06/2019, 15:05
The aim of this work is to unveil a striking equivalence between the one-loop divergences in 7D Einstein and 6D conformal gravities.
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The particular combination of 6D pointwise Weyl invariants of the 6D conformal gravity corresponds to those of Branson's Q-curvature and can be written solely in terms of the Ricci tensor and its covariant derivatives.
The quadratic metric fluctuations of this... -
Antonella Cid12/06/2019, 15:30
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Pedro Labraña (UBB)12/06/2019, 16:10
In this work we study an alternative scheme for an Emergent Universe scenario in the context of a Jordan-Brans-Dicke theory, where the universe is initially in a truly static state supported by a scalar field located in a false vacuum. The model presents a classically stable past eternal static state which is broken when, by quantum tunneling, the scalar field decays into a state of true...
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Leandro Monje (PUC)12/06/2019, 16:35
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Igor Kondrashuk (UBB)12/06/2019, 17:00
We propose an algorithm to solve DGLAP integro-differential equation analytically in higher orders of the running gauge coupling α with splitting functions given at a fixed order in α. Complex analysis is significantly used in the construction of the algorithm, we found a simpler way to calculate the involved integrals over contours in the complex planes than by any of the well-known methods.
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Markos Maniatis (Departamento de Ciencias Basicas, UBB, Chillan, Chile)13/06/2019, 09:00
n 2004 it has been shown that scattering amplitudes can be expressed by
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glueing together simple three-point on-shell amplitudes. These so-called
BCFW-recursion relations can for instance be used to proof the explicit
form of the n-gluon scattering amplitude as conjectured by Parke and
Taylor. Moreover, the basic building blocks, the three-point on-shell
amplitudes, are, apart from a... -
Dr Alvarez Pedro (Universidad de Antofagasta)13/06/2019, 09:25
Using unconventional SUSY, we construct a model that allow us to obtain a theory that is chiral and contains dynamical gravity, therefore resembling the structure of the Standard Model and General Relativity. We review the main features of Zanelli's unconventional SUSY that allow us to couple matter fields in a gauge invariant way. We will discuss the difficulties, advantages and future tasks...
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Fabrizio Canfora13/06/2019, 10:05
In this talk I will show how one can deduce exact analytic results in the Skyrme model on flat space-times using a quite remarkable mapping from the Einstein-Skyrme system. In particular, the explicit form of the critical Isospin chemical potential for one Skyrmion will be derived. Moreover, I will also describe analytically how Skryme crystals appear at finite Baryon density. Due to the...
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Alex Soto Villarroel13/06/2019, 10:30
We discuss the Schwinger model in the formalism of Very Special Relativity. Although there is not mass from spontaneous symmetry breaking, there is a mass term coming from the SIM(2) invariant terms and the axial current stills conserved in this case. It is shown that the current when the fermion is coupled to an external electromagnetic field is modified due to the non local operator present...
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Cristobal Laporte13/06/2019, 11:10
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Carlos Contreras (Santa Maria)13/06/2019, 11:35
In this talk we will present first numerical calculation of the Odderon intercept and slope obtained with IR-regulator approach.
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13/06/2019, 12:00
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Filipe Canales (PUC)14/06/2019, 09:00
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Dr Igor Justo (UACh)14/06/2019, 09:25
Momentum space topology (MST) has been used since a long time in the study of condensed matter physics and nowadays it has become the main theoretical tool for the description and classification of topological insulators. This is because within MST it is possible to construct a topological invariant quantity in terms of two-point Greens function,...
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Marcelo Loewe (PUC)14/06/2019, 10:05
We discuss how magnetic fields and temperature affect the behavior of π-π scattering lengths in the linear sigma model. These are interesting parameters in the context of the physics of relativistic heavy ion collisions. We extend previous results were only magnetic effects were taking into account. Although the effects are comparatively small, it is interesting to remark that magnetic field...
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York Schröder (UBB Chillán)14/06/2019, 10:30
Feynman integrals (FIs) play a central role in quantum field theory (QFT). They comprise the coefficients of weak-coupling expansions within theoretical particle physics, allowing for high-precision comparisons of theory with collider experiments with the ultimate goal of discovering new elementary particles.
Given this strong phenomenological motivation, FIs form interesting objects to...
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Ricardo Avila (USACH)14/06/2019, 11:10
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Mauro Cambiaso (Andres Bello)14/06/2019, 11:35
Weyl semimetals (WSMs) are a new class of topological materials that exhibit a bulk Hall effect and a chiral magnetic effect. The topological contribution of these unusual electromagnetic responses can be characterized
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by an axion term $\theta \mathbf{E} \cdot \mathbf{B}$ with space and time dependent axion angle $\theta(r,t)$. In this presentation I will show the electromagnetic fields... -
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