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Séminaires et colloques
Séminaire post-doctorants: Rafal Maselek (Theory) & Mateo Fernandez Torreiro (Cosmo ML) (2/3)
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Europe/Paris
Grand Amphithéâtre (LPSC)
Grand Amphithéâtre
LPSC
Description
Mateo Fernandez Torreiro: "The QUIJOTE experiment: component separation analyses with MFI data and TFGI commissioning results"
QUIJOTE is a 2-m radiotelescope located at the Tenerife observatory and focused on CMB observations. In the first part of this talk I will present component separation analyses performed with the first instrument installed at QUIJOTE, the MFI. The MFI observed the full north sky from 2012 to 2018 between 10-20 GHz, while being focused on the characterization of low frequency CMB foregrounds (and more specifically, synchrotron). The presented analyses, on the other hand, are focused on the study of anomalous microwave emission (AME), a recently discovered emission component important at the 10-60 GHz frequency range. The first presented study is focused on proving the presence of AME spatial variations along the plane; while the objective of the second is to confirm or neglect the presence of AME in M31 proposed by previous works.
In the second part of the talk, I will discuss the commissioning analyses for the TFGI instrument and the first scientific results obtained with it. The TFGI is the second instrument installed in QUIJOTE, and observes the sky between 30-40 GHz since 2021. From this, I estimate the performance of the instrument and compare it with the expected one from its design phase. I will show that the TFGI instrument will achieve a 0.05 μK deg-1 sensitivity level in polarization (at 93 GHz) after 3 years of observations, observing three different cosmological fields of 1200-1300 deg2 each. This sensitivity is similar to that achieved by one Small Aperture Telescope (SAT) from Simons Observatory (SO), that being 0.06 μK deg-1 after 5 years of observations.
Rafal Maselek: "Exploring long-lived BSM Particles at the LHC"
The Standard Model of particle physics, a very beautiful and successful quantum field theory, describes three fundamental interactions and explains various microscopic phenomena. However, despite its effectiveness, the Standard Model has certain limitations and cannot be considered as the final theory, which inspired the exploration of Beyond the Standard Model (BSM) Physics, a pursuit underway at the Large Hadron Collider (LHC) at CERN. Unfortunately, despite extensive efforts, the search for BSM particles remains inconclusive, steering research towards alternative paths. One of them is to search for particles with very long lifetimes, which have not been extensively studied yet. In the talk, I will present the outcomes of my PhD thesis, focusing on the detection prospects for electrically charged long-lived particles during the upcoming LHC operational phases. Special attention will be given to the MoEDAL experiment, originally designed for magnetic monopole searches, and its comparative analysis with major LHC experiments, namely ATLAS and CMS.
