Saturnalia 2024

17 Dec 2024, 11:30 → 20 Dec 2024, 14:00 Europe/Madrid

Seminario de Física Atómica, Nuclear y Molecular (Facultad de Ciencias)

Javier Redondo (CAPA, DPTUZ), Laura Segui Iglesia (CAPA, Universidad de Zaragoza), Mathieu Kaltschmidt (Universidad de Zaragoza), Siannah Penaranda-Rivas (University of Zaragoza, Spain)

Conference series dedicated to catch up with the recent Theoretical and Experimental developments in the broad range of fields covered by our center CAPA,  as well as with the adventures and misfortunes of our dear young expats.

 

saturnalia24_poster_final.pdf

Tuesday 17 December

1 Enhancing 0ν2β Detection with the CROSS Demonstrator

Speaker: David Cintas (IJCLab, Saclay)

Presentacion Saturnalia.pdf

2 Geometric Flavours of Quantum Field Theory: Applications to Cosmology

Speaker: David Martínez

saturnalia.pdf

3 Machine Learning Developments for 3D Muon Tomography of a Nuclear Reactor

Speaker: Héctor Gómez (CEA, Saclay)

Wednesday 18 December

4 Hunting for Dark Matter with ANAIS-112: Latest Results and ongoing Work

Speaker: Jaime Apilluelo Allué

Presentación ANAIS Saturnalia - JAA.pdf

Presentación ANAIS Saturnalia - JAA.pptx

5 A Cosmic Dance: How Supermassive Black Holes and their Host Galaxies are tangled up

In a recent research, just published in Nature Astronomy, we have found a connection between the supermassive black hole (SMBH) and the galaxy that host them, despite the huge difference in scale between both astrophysical objects. Using Very Long Baseline Interferometry (VLBI) and optical survey images, we found a weak but significant alignment between the direction of the jets emitted by the SMBHs and the shape of the galaxy. In particular, we found a consistent alignment between the jet and the galaxy's minor axis. The implications of this study link the black hole, despite its small size compared relative to the host galaxy, with the cosmic environment. Finally, the finding suggests that the black hole may play a significant role in shaping the galaxy and some sort of co-evolution, providing new insight into galaxy evolution and rising new questions, entangled with recent observations by the James Webb Space Telescope on early quasars.

Speaker: Jacobo Asorey Barreiro (CAPA, Universidad de Zaragoza)

SaturnaliaUnizar2024_JacoboAsorey.pdf

6 Spectrum of Global Strings and the Axion Dark Matter Mass

Cold dark matter axions produced in the post-inflationary scenario serve as clear targets for their experimental detection, since it is in principle possible to give a sharp prediction for their mass once we understand precisely how they are produced from the decay of global cosmic strings in the early Universe.
We performed a dedicated analysis of the spectrum of axions radiated from strings based on large scale numerical simulations of the cosmological evolution of the Peccei-Quinn field on a static lattice. It turns out that there are several systematic effects that have been overlooked in previous works, such as the dependence on the initial conditions, contaminations due to oscillations in the spectrum, and discretisation effects, some of which could explain the discrepancy in the literature. We confirmed the trend that the spectral index $q$ of the axion emission spectrum increases with the string tension, but did not find a clear evidence of whether it continues to increase or saturates to a constant at larger values of the string tension due to the severe discretisation effects. Taking this uncertainty into account and performing the extrapolation to realistic string tensions with a simple power law assumption on the spectrum, we found that the dark matter mass is predicted in the range of $m_a \approx 95-450 \mu$eV.

Speaker: Mathieu Kaltschmidt (Universidad de Zaragoza)

Kaltschmidt_Saturnalia24.pdf

Thursday 19 December

7 Phenomenology of Theories of Gravitation beyond General Relativity

Speaker: Miguel Pardina (CAPA, Universidad de Zaragoza)

MPardina_Saturnalia2024.pdf

8 Dark Matter Detection with a Superconducting Qubit in the DarkQuantum Project

Speaker: Yikun Gu (CAPA, Universidad de Zaragoza)

Saturnalia2024_DarkQuantum_final.key

9 Searching for New Physics in Semileptonic B Decays using Lattice QCD

Speaker: Alejandro Vaquero (CAPA, Universidad de Zaragoza)

Saturnalia-Talk.pdf

Friday 20 December

10 Neutron-Capture Experiments and the Synthesis of Heavy Elements

Speaker: Jorge Lerendegui (IFIC, Valencia)

Link to talk

11 Primordial Correlators: Opening a Window into the very early Universe

Speaker: Carlos Duaso Pueyo (Scuola Normale Superiore, Pisa)

12 Doubly Special Relativity as a Nonlocal Quantum Field Theory

Speaker: Javier Relancio Martínez (Universidad de Zaragoza)

Relancio_Saturnalia_24.pdf