Particules

Reconstruction of neutrino events in the MicroBooNE detector 

MicroBooNE is a Liquid Argon Time Projection Chamber (LArTPC) neutrino experiment on the Booster Neutrino Beamline at the Fermi National Accelerator Laboratory, with an 85-tonne active mass.
One of MicroBooNE’s primary physics goals is to investigate the excess of electron neutrino events seen by MiniBooNE in the [200-600] MeV range.
MicroBooNE will constrain the intrinsic electron neutrino component of the beam by measuring the muon neutrino spectrum.

Seminar Thibaut Houdy: KATRIN, from neutrino mass to Dark Matter

The KATRIN (Karlsruhe Tritium Neutrino) experiment investigates the energetic endpoint of the tritium beta-decay spectrum to determine the effective mass of the electron anti-neutrino. The collaboration reported its first neutrino mass result in fall 2019. Its unprecedented tritium source luminosity and spectroscopic quality make it a unique instrument to also search for physics beyond the standard model such as eV or keV sterile neutrinos.

Neutrino properties from atmospheric neutrinos from a KM3NeT/ORCA near-future perspective

Atmospheric neutrino experiments measure the oscillations of neutrinos produced in the atmosphere by default assuming unitary mixing of electron-, muon-, and tau-neutrinos. The task-list for the upcoming years involves: (a) Measure the atmospheric mixing parameters with increased precision. (b) Determine the known unknowns in the framework of three neutrino flavours: ordering of neutrino masses and CP-violation.

Updated Neutrino and Antineutrino Results from NOvA

The discovery of the third neutrino mixing angle, theta13, in 2012 opened a door to discovering if CP symmetry is violated in the lepton sector, and the ordering of the neutrino mass eigenstates. NOvA is exploring this new landscape by measuring the appearance of electron (anti)neutrinos in a beam of muon (anti)neutrinos. Recently we have obtained the first evidence for electron antineutrinos appearing in a beam of muon antineutrinos. With a baseline of 810 km NOvA has nearly triple the matter effect of T2K and sensitivity to the mass hierarchy.

Physics and status of Hyper-Kamiokande

Hyper-Kamiokande, the next generation of water Cherenkov neutrino observatory, will open fascinating new window on the universe, including the search for Grand Unified Theory through proton decay, neutrino astronomy, and determination of the CP violation in the lepton sector. In the first part of this seminar, we will present some questions remaining in these various physics domains, as well as the answers we may be able to provide with Hyper-Kamiokande.

Searches for dark matter with the DarkSide experiment: results and perspectives

A big-bang relic population of WIMPs remains one of the most favored candidates for the yet-to-be-discovered dark matter. DarkSide uses dual-phase liquid argon (LAr) Time Projection Chambers (TPCs) to search for WIMPs. The current phase of the experiment, DarkSide-50, consists in a 50-kg-active-mass TPC filled with argon from an underground source. I will discuss in detail its recent results, namely a background free search for high-mass WIMPs (>10 GeV/c2) and the world-leading exclusion limit for WIMPs with mass between 2 and 6 GeV/c2.

Theta13: From the 'discovery' to the sub-percent precision era (2000 - 2030)

The standard neutrino oscillation parametrization is defined by six independent parameters: three mixing angles (θ23, θ12 and θ13), two squared mass differences and a CP violation phase (δcp). By 2010, only θ13 and δcp were still unknown. Despite the non-zero measured values of θ12 and θ23, a non zero value of θ13 is also necessary to open the window to explore CP violation on the lepton sector. In 2011, T2K (accelerator based) and Double Chooz (reactor based) experiments showed an evidence of non-zero θ13.

Flavour at LHCb, where are we (going)?

The LHCb detector has officially ceased to take data in December  2018, 8 years after its first run.  During that period, the collaboration has marked a few milestones ranging from the observation of pentaquarks to the several intriguing results, commonly called "the B physics anomalies", which could shed light on what lies beyond the Standard Model.
In this seminar I present an overview of the current status of flavour physics at LHCb, and the main prospects for Run 3 and beyond, in a physics landscape marked by Belle 2 and new-generation neutrino experiments. 

T2K recent results and future prospects

T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment designed to measure (anti-)neutrino flavour oscillations using an off-axis (anti-)neutrino beam. After the measurement of a non-zero value for the last unknown mixing angle, theta13, and the most precise measurement of  theta23, T2K has started a campaign to measure CP violation in the leptonic sector taking data with both neutrino and an anti-neutrino beam.

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