The manager of the Institute is going to explain the different services the secretariat provides for the researchers.
The low energy effective theory (LEFT) provides a general framework for the analysis and interpretation of any experimental data at energies below the electroweak scale. This includes most of the data we have today in particle physics, e.g. lepton and hadron decays and mixing, electric and magnetic dipole moments, cross sections in GeV-scale collisions and other particle properties.
In this...
One of the main targets for upcoming gravitational wave observatories is the detection of a cosmological stochastic gravitational wave background (SGWB). Such a signal has the potential to shed light on part of the cosmological history not accessible by other means as well as to probe new physics at energy scales beyond the reach of terrestrial experiments.
A stochastic background, for...
At first, the primordial black hole formation in a spherically symmetric model of density perturbation will be introduced, known as Three-zone model. And then I would like to explain some shortages regarding to this model. Finally, a more realistic scenario will be shown.
The quark-gluon plasma (QGP) is a new state of matter that appears at extremely large temperatures and densities. This phase appeared in the early universe and, nowadays, we can recreate it in the laboratory using ultrarelativistic heavy ion collisions. However, it is very challenging to obtain information about the matter created in these collisions as the medium only exists for a very small...
The discovery of a large highly radially anisotropic kinematic structure dominating the vast majority of the stellar halo of the Milky Way (better known as the Gaia-Sausage-Enceladus merger debris, GSE) has prompted several studies in the recent years to report discoveries of other debris. Whilst evidence in favour of the GSE merger has continued to grow, the consensus around the origins of...
Neutron stars are natural laboratories for studying strongly correlated matter in extreme conditions. In such an environment, exotic components, such as hyperons can appear. Their impact is significant on the mass-radius relation for the cold neutron stars but also on the thermal quantities that are essential for describing violent phenomena such as supernovae explosions or binary neutron star...
In this talk I outline the motivation for BSM physics, and focus on the opportunity that flavour physics offers for new physics searches. After the introduction and motivation we look at a concrete BSM model, the Dark Photon. We perform an analysis for 2-body meson and baryon decays which allows to set bounds on the flavour-changing couplings of the model.
Early-type OB stars are hot and have strong radiation fields that accelerate supersonic winds that can reach velocities of a few thousands of km/s. Most of these stars are part of binary systems, and some are kicked away from their orbits by a supernova explosion of their companion or because of tidal gravitational disruptions. The ejected star is denominated runaway and has typical supersonic...
Heavy-ion collision experiments are essential to the goal of characterizing QCD matter properties at different conditions of temperature and density. From the theoretical side, the determination of the QCD phase diagram is only possible at very particular regions, and effective models provide useful, but not definite results. In this talk I will elaborate on how heavy-ion experiments allow to...
Quantum fluctuations can stabilize bosonic mixtures and Bose-Einstein condensates (BECs) with dipolar interactions against the collapse predicted by the mean-field theory. This stabilization mechanism allows for two new states of matter to arise: self-bound quantum droplets and dipolar supersolids. When dipolar interactions between the atoms are present, these droplets can self-assemble into...
The Technological Unit of the ICCUB is currently providing several groups of ICCUB with services, such as instrumentation and software development, in order to support their contributions to international collaborations. Many developments on instrumentation are related to sensitive photosensor readout technology with key contributions in international projects such as LHCb, CTA, HERD, LISA and...
The ICCUB Technological Unit is contributing to the software development and data processing of several projects. The most important one is Gaia, both on its data processing and on its catalogue validation and data mining aspects, but we are progressively increasing our contributions to other projects such as Virgo, ET, PLATO, nanosatellites, and soon LISA. In this talk I will present and...
Photsat is the first astrophysics observatory being prepared by the catalan institute of space studies (IEEC) to be allocated in a cubesat mission. The mission aims to survey the full sky during 2-3 years, obtaining photometric lightcurves for V<12-15 mag in several photometric filters, covering the optical and the ultraviolet range. This will provide information of the transient sky at the...
The discovery of gravitational waves has opened a new experimental window into the Universe. The fact that the relevant physics is often out of equilibrium offers a golden opportunity for holography to make a unique impact on cosmology and astrophysics. I will illustrate this through the dynamics of first-order phase transitions in the early Universe and in neutron star mergers. If time...
Common Envelope Evolution (CEE) is a critical phase in the evolution of binary stars. It is required to shrink the orbits of stars born in pairs towards much tighter configurations, with final orbital periods of days, hours, or even minutes. Many high-energy astrophysical phenomena are created this way: type Ia supernovae, X-ray binaries, or gravitational wave sources among others....
Gaia4Sustainability is a Proof-of-Concept project granted by the Ministerio de Ciencia e Innovación in the 2021 call. The project aims to develop a robust, reliable, and straightforward framework for estimating the natural brightness of the sky. High quality photometry provided by the ESA Gaia satellite allows the computation of the contribution of the integrated star light to the sky...
Growing evidence suggests that vacuum entanglement entropy (EE) may provide a universal description of QFT (in general dimensions), alternative to correlation functions. In this talk I will review the set of known axioms satisfied by EE in QFT and some of its successes in the direction of uniquely characterising the different models. Then, I will argue that such set of axioms is at present...
During solar maximum, the frequency of CMEs being expelled from the Sun is in the order of a few events per day. If an event is capable of driving a shock strong enough to accelerate particles, then we might be able to register a gradual SEP event at Earth’s location. But what happens when we have a highly disturbed interplanetary medium at the time of the SEP event? How do preceding CMEs...
