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Saturnalia 2022

16–22 Dec 2022
Facultad de Ciencias and ONLINE https://rediris.zoom.us/j/83767424733
Europe/Madrid timezone

Javier Redondo, Siannah Peñaranda, Jorge Alda, Mathieu Kaltschmidt

Contribution List

12 out of 12 displayed
  1. 5. Searching for Dark Photons with IAXO
    Tomás Gerard O Shea (CAPA)
    16/12/2022, 16:30

    Axion heliioscopes such as CAST have been used to search for dark photons and, in the absence of their detection, set a limit on dark photon parameters. I am using similar analysis to determine the parameter space that IAXO will be able to explore, and will extend this analysis to include the mixing of different polarisations of solar plasmons by the sun's magnetic field and how this mixing...

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  2. 7. Using X-ray optics for nuclear physics applications
    Jaime Ruz (CAPA)
    19/12/2022, 12:00
  3. 9. ALP production in weak mesonic decays
    Alfredo Walter Mario Guerrera (Università degli Studi di Padova/INFN)
    19/12/2022, 13:00

    Axion-Like-Particles are among the most economical and well motivated extensions of the Standard Model. In this talk ALP production from hadronic and leptonic meson decays are studied. The hadronization part of these decay amplitudes has been obtained using Brodsky-Lepage method or LQCD, at needs. In particular, the general expressions for ALP emission in mesonic s- and t-channel tree-level...

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  4. 10. Searching for ALPs-photon conversion on fiber interferometer
    Yikun Gu (Hamburg University)
    20/12/2022, 12:00
  5. 11. Parametric resonances in domain walls and cosmic strings
    Daniel Jiménez Aguilar (UPV/EHU)
    20/12/2022, 13:00

    Based on
    https://arxiv.org/abs/2209.12945
    https://arxiv.org/abs/2212.06194

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  6. 16. Cosmology from SKA Observatory pathfinders
    Jacobo Asorey (Universidad Complutense de Madrid)
    20/12/2022, 16:30
  7. 18. Formation of shadows around compact objects as observational proofs of new gravitational physics
    Diego Sáez
    20/12/2022, 17:30

    In this talk I will discuss the features of the formation of shadows around some (ultra)-compact objects due to the presence of light rings surrounding the central depression of optically-thin accretion disks. The shapes of the shadows might reveal novel spacetime structures beyond the well known Kerr family, such that future observations of additional light rings through very-long baseline...

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  8. 2. Machine-learned exclusion limits without binning
    Rosa María Sandá Seoane (IFT Universidad Autónoma de Madrid-CSIC)
    21/12/2022, 12:00

    Machine-Learned Likelihood (MLL) is a method that, by combining modern machine-learning classification techniques with likelihood-based inference tests, allows to estimate the experimental sensitivity of high-dimensional data sets. We extend the MLL method by including the exclusion hypothesis tests, and show that the addition of Kernel Density Estimators avoids the need to bin the classifier...

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  9. 1. Using Machine Learning techniques in phenomenological studies in flavour physics
    Jorge Alda (CAPA)
    21/12/2022, 13:00

    In the recent years, a series of measurements in the observables RK(*) and RD(*) concerning the semileptonic decays of the B mesons have shown hints of violations of Lepton Flavour Universality (LFU). An updated model-independent analysis of New Physics violating LFU, by using the Standard Model Effective Field Theory (SMEFT) Lagrangian with semileptonic dimension six operators at Λ = 1 TeV...

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  10. 12. Automatic Nelson-Barr from Gauged Flavor and ALP searches at FASER
    Pablo Quílez (DESY)
    21/12/2022, 16:30

    Despite the exceptional appeal of the Peccei-Quinn mechanism as a solution to the strong CP problem, alternative mechanisms should still be pursued. In this direction, I will present in the first part of my talk how a Nelson-Barr mechanism (NB) arises automatically in the context of gauged flavor models. Given the tight connection of the strong CP problem with flavor, this framework will be...

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  11. 19. Over the Rainbow ... of Gravitational Waves
    Diego Blas (UAB/IFAE)
    22/12/2022, 11:00

    Gravitational waves from different frequencies bring information about different phenomena of the Universe. CMB studies, Ligo-Virgo-Kagra, PTA and LISA-like missions are able to provide relevant information in several bands, but leave some gaps where new signals may be hiding. In this talk, I’ll first give an overview of the different phenomena probed and main detection strategies at different...

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  12. 13. Doubly special relativity as a road to quantum gravity
    Javier Relancio Martínez (Universidad de Burgos)
    22/12/2022, 12:00