Categoría: Actividades

El 28 de abril a las 16.30 h. tendrá lugar el seminario organizado por el Centro de Astropartículas y Física de Altas Energías «News on the muon g-2: an informal discussion», impartido por Pere Masjuan (IFAE) y Alejandro Vaquero (Utah U.)
El seminario se realizará a través del siguiente enlace zoom. También se podrá seguir en directo a través del canal YouTube de CAPA (se recomienda usar el enlace zoom para poder participar en la discusión).

Abstract:
In the light of the recent experimental results on the muon g-2, we would like to scrutinize the Standard Model contributions, comment about its weak and strong points, and openly discuss with the Zaragoza group about possible avenues to explain the apparent anomaly.

El 25 de febrero a las 12 h tendrá lugar el seminario organizado por el Departamento de Física Teórica y CAPA titulado «Search for Light dark matter with Spherical Proportional Counters«, que será impartido telemáticamente por Ioannis Katsioulas (School of Physics and Astronomy, University of Birmingham, United Kingdom).
Conexión a través del enlace zoom: https://rediris.zoom.us/j/85134053268.

Cartel y resumen del seminario: pdf

Diapositivas de la presentacion: pdf

The main difficulty of perturbative quantum gravity (QG) in D=4 dimensions is the conflict between renormalizability and unitarity of the theory. The simplest version of QG is based on General Relativity and turns out to be nonrenormalizable. One can construct renormalizable and even superrenormalizable versions of QG by introducing higher derivatives. In the local versions of higher derivative models of QG there are always unphysical higherderivative massive unphysical ghosts. One can construct non-polynomial in derivatives (or, equivalently, nonlocal) models of QG, which have no ghosts at the tree level. However, taking loop corrections into account one meets infinite amount of ghost-like complex states. The theories of both local and nonlocal types attracted a lot of attention in the last years and our purpose it to present a brief review of the problems and perspectives of these models, according to the present-day understanding.