Focus on: 
Back to Conference View
Login

Saturnalia 2025

→ Europe/Madrid
Seminario de Física Atómica, Nuclear y Molecular (Facultad de Ciencias)

Seminario de Física Atómica, Nuclear y Molecular

Facultad de Ciencias
Jacobo Asorey Barreiro (CAPA & Universidad de Zaragoza), Javier Redondo (CAPA, DPTUZ), Laura Segui Iglesia (CAPA, Universidad de Zaragoza), Mathieu Kaltschmidt (CAPA, Universidad de Zaragoza), Siannah Penaranda-Rivas (University of Zaragoza, Spain), Sophia Hollick (CAPA, Universidad de Zaragoza)
Description

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.

Saturnalia2025_Poster.pdf
Contact Organisers
  • Tuesday 16 December
    • 11:30 → 12:00
      Stripped-Envelope Supernovae for QCD Axion Detection 30m

      The QCD axion, arising from the Peccei–Quinn solution to the strong-CP problem, remains one of the most compelling candidates for physics beyond the Standard Model and for the dark matter of the Universe. Core-collapse galactic supernovae provide exceptional laboratories for probing such particles, as the extreme densities and temperatures inside the proto-neutron star lead to copious axion emission. The only “close” supernova observed in modern times, SN 1987A, occurred not in the Milky Way but in the Large Magellanic Cloud at 51 kpc. Despite the limited sensitivity of the only γ-ray telescope operating back then, Solar Maximum Mission (SMM), constraints on axions and axion-like particles ALPs derived from that event are still among the most competitive.

      Today, γ-ray telescopes such as Fermi-LAT offer nearly two orders of magnitude greater effective area, making the next Galactic supernova a realistic discovery opportunity. Axions produced during the cooling phase can convert into ~100 MeV photons in the progenitor star’s own magnetic field. In this talk, I will show that stripped-envelope Type Ibc supernovae, which are compact and possess strong surface magnetic fields, provide the optimal conditions for a possible QCD axion detection.

      Speaker: Francisco Rodríguez Candón (Universidad de Zaragoza)
      WISP_TypeIc.pdf
    • 12:00 → 12:30
      Detecting axion dark matter with resonant cavities: The RADES Collaboration 30m
      Speaker: Cristian Cogollos Triviño
      Saturnalia_2025.pdf
    • 12:30 → 13:00
      Multiple ALPs in Laboratory Experiments 30m
      Speaker: Sebastian Monath (University of Heidelberg)
      SlidesSaragossaSMonath.pdf
  • Wednesday 17 December
    • 12:00 → 12:30
      Casimir Energy in Non-Abelian Gauge Theories 30m
      Speaker: Fernando Ezquerro (CAPA, Universidad de Zaragoza)
      Casimir_gauge.pdf
    • 12:30 → 13:00
      Prospects of CMB B-modes with future CMB and large-scale structure experiments 30m

      In the era of high precision Cosmic Microwave Background (CMB) anisotropy measurements, detection of primordial B-modes polarisation will be one of the goals of the current and upcoming CMB experiments. In this talk I will present the methodology of detecting B-modes from Simons Observatory-like CMB experiment. I will also discuss how including probes of large scale structure can improve the measurement of tensor-to-scalar ratio.

      Speaker: Chandra Shekhar Saraf (Korea Astronomy and Space Science Institute)
      ChandraShekhar_Saraf.pdf
  • Thursday 18 December
    • 12:30 → 13:00
      GeV-ALP searches with ALP-aca 30m

      Axion-Like particles (ALPs) are pseudoscalar neutral particles that are predicted by many New Physics theories. The GeV mass range is interesting for several reasons: the constraints in parameter space are weaker, the flavour structure of the couplings to SM fermions plays an important role, and it can be explored by different experiments such as BESIII, Belle II and LHCb. But there is also an important theoretical challenge in the description of ALP processes involving light mesons. In this talk, I will present the code ALP-aca (ALP automatic computing algorithm) that we have developed in order to study the phenomenology of GeV ALPs, and discuss some application in ALPs produced in flavour-changing meson decays, quarkonia decays and proton collisions.

      Speaker: Jorge Alda (Università degli Studi di Padova)
      alpaca_saturnalia25.pdf
    • 13:00 → 13:30
      Axion searches with IAXO: from the Sun to Supernovae 30m
      Speaker: María Jiménez Puyuelo (Universidad de Zaragoza / CAPA)
      IAXO_Saturnalia2025_MJP.pdf
    • 13:30 → 14:00
      Taming forward-scattering singularities in partial waves: Is the classical Higgs unitarity bound well defined? 30m
      Speaker: Pablo Quílez Lasanta (CERN)
      P.Quilez-Saturnalia 2025.pdf
  • Friday 19 December
    • 12:30 → 13:00
      Scientific Data Management at CERN 30m
      Speaker: Luis Antonio Obis Aparicio (University of Zaragoza)
      Luis Saturnalia 2025.pdf
    • 13:00 → 13:30
      Characterization of 39Ar Activity for DarkSide-20k with DArTinArDM 30m
      Speaker: Swadheen Bharat (CAPA, Universidad de Zaragoza)
      Saturnalia_2025_Swadheen.pdf
    • 13:30 → 14:00
      Many-body wavefunctions from conformal field theory 30m

      In quantum many-body physics, ansatz wavefunctions and toy models can provide useful information about entanglement patterns and phases of matter. In this talk, we introduce families of spin chain wavefunctions defined in terms of correlators in chiral conformal field theory, which interpolate between well-known gapped and gapless exactly solvable models, and give rise to a certain correspondence between the geometry of the quantum field theory and the entanglement content of the spin chain.

      Speaker: Adrián Franco Rubio (U. Complutense de Madrid)
      Saturnalia.pdf