Particles and Gravitation

The characteristic vibrational modes of a black hole are known as “quasinormal modes”, and they describe the response of a black hole after a perturbation and its subsequent gravitational wave emission. In this project, we will analyze the quasinormal modes of black holes in general relativity  (GR) and beyond. In the case of GR, the perturbations of Kerr black holes are described by the Teukolsky equation.

In this thesis, you will make predictions for the forthcoming measurements of baryon form factors by the HADES collaboration [1].

The sensitivity of the rare decays η/η'→π0γγ to signatures of Beyond the Standard particles in the MeV-GeV mass range will be analyzed in this work.

A neutron star merger is a highly dynamical system in which the four fundamental forces of nature—electromagnetic, weak, strong, and gravitational—play significant roles. This makes it an intriguing laboratory for studying fundamental physics, which can be explored experimentally through both gravitational and electromagnetic waves. To model this system, instead of solving quantum chromo

In this thesis, you’ll develop a model describing the photoproduction of tensor mesons based on the model from Ref. [1] and the data from Refs. [2-4]. You will learn some standard techniques and theories used in particle physics such as the helicity formalism, the decomposition into partial waves, the S-matrix (or scattering) theory and Regge theory. 

In this thesis, you will develop a model for a strange cascade, that is, a reaction in which several baryons containing strange quarks are produced. The GlueX collaboration (Hall D at the Thomas Jefferson Lab) is exploring the possibilities of setting up a polarized proton target [1]. A polarized target could potentially help in the determination of the quantum numbers of the produced strange baryon.

In this thesis, you will make predictions for the forthcoming measurements of baryon form factors by the HADES collaboration [1].

The project can be carried in Barcelona and/or remotely with weekly Zoom meetings with the supervisor.

In this thesis, you will develop a powerful technique to analyze baryon resonances produced in photoproduction through the angular decomposition of their decay product. You will generalize the formalism developed in Ref~[1] to the baryon system.

The X(3872) is an exotic quarkonium state which can not be explained within the quark model. Several configurations have been proposed for the internal structure of this state, being the most popular ones the compact tetraquark and the hadronic molecule. Recently, the X(3872) has been observed in heavy-ion collisions, in which a hot QCD medium is created. Studying how the medium modifies the properties of the X(3872) we can obtain additional information that might allow us to determine whether this state is a tetraquark or a molecule.