Next Seminars


Apr 15, 2024
New Physics searches in fundamental constants
Cedric Delaunay (LAPTH)
See more Hide
Start:
Monday, April 15, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, April 15, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
Apr 22, 2024
Search for New Physics with invisible particles in Belle II
Jacopo Cerasoli (Université de Strasbourg, CNRS, IPHC, UMR 7178, 67037 Strasbourg, France)
See more Hide
Description :

The B+ -> K+ nu nu decay is mediated by a flavor-changing neutral current, which makes this decay quite rare in the Standard Model, happening about 6 times every million B+ decays, according to the theory. Moreover, the presence of two undetected neutrinos in the final state and of only one visible charged track makes searching for this decay particularly challenging. 

We perform an analysis using electron-positron collisions recorded by the Belle II experiment between the years 2019 and 2022, using the properties of the accompanying B meson in the event to suppress background from other decays of the signal B candidate and light-quark pair production. We determine the branching fraction of the decay to be 2.7 sigma above the Standard Model expectation, providing the first evidence for this decay with a significance of 3.6 standard deviations.

Start:
Monday, April 22, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, April 22, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
May 6, 2024
Status of the Euclid mission in flight
William Gillard (CPPM - Université Aix-Marseille)
See more Hide
Description :

Euclid is an ESA mission aiming at studying the geometry and nature of the dark Universe. Over a span of six years, Euclid will meticulously survey nearly 15,000 square degrees of the extragalactic sky. Equipped with optical capabilities spanning from 530 to 920 nanometers and near-infrared imaging in Y, J, and H bands, as well as slitless spectroscopy ranging from 1206 to 1892 nanometers, Euclid will capture detailed data on distant galaxies between redshift of 0.84 and 2. Launched successfully on July 1, 2023, Euclid was placed in orbit around the second Lagrange point where both of its cutting-edge instruments, the VIS and the NISP, underwent meticulous commissioning and calibration over the initial six months of the mission. As the Euclid survey commenced in February 2024, this presentation will provide insights into the mission's status at Lagrange 2 and showcase the initial scientific images and results captured by both instruments.

Start:
Monday, May 6, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, May 6, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
May 27, 2024
New Sensors for Magnetoencephalography
Jean-Michel Badier (INSERM)
Christian Bénar (INSERM)
See more Hide
Start:
Monday, May 27, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, May 27, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
Jun 3, 2024
CTA
Gabriel Emery (CPPM)
See more Hide
Start:
Monday, June 3, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, June 3, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
Jun 10, 2024
The ITK, the New ATLAS Tracker for HL-LHC
Thomas STREBLER (CPPM, Aix-Marseille Université, CNRS/IN2P3 (FR))
See more Hide
Start:
Monday, June 10, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, June 10, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
Jun 17, 2024
L'ITK-Pixels, le nouveau détecteur à pixels d'ATLAS pour HL-LHC
Eric Vigeolas (CPPM)
See more Hide
Start:
Monday, June 17, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, June 17, 2024 at 3:30:00 PM Central European Summer Time
Indico page:
Oct 7, 2024
Physics at ISOLDE
Sean Freeman (CERN/The University of Manchester)
See more Hide
Start:
Monday, October 7, 2024 at 2:00:00 PM Central European Summer Time
End:
Monday, October 7, 2024 at 3:30:00 PM Central European Summer Time
Indico page:

5 last Seminars


Mar 25, 2024
Marie Curie et les plafonds de verre
Fabrice Feinstein (Aix Marseille Université/CNRS/IN2P3/CPPM)
See more Hide
Description :

Marie Curie, première femme lauréate du prix Nobel de physique, puis de chimie, première femme nommée professeur à la Sorbonne, a fait exploser de multiples plafonds de verre, quand ce n’étaient pas les murs de pierre de la société russe, puis française, puis internationale. Outre son activité de premier plan en physique, elle a pris de nombreuses initiatives novatrices moins connues comme  ses actions envers l’enseignement des sciences aux enfants, la médecine, son implication dans Commission Internationale de Coopération Intellectuelle (CICI), ancêtre de l’UNESCO, la formation de radiologues sur le front de la Grande Guerre… 
Cette conférence informelle s’adresse à tous, non-physiciens comme physiciens, curie-eux et curie-euses de l’histoire de notre science et de cette femme hors du commun.

Start:
Monday, March 25, 2024 at 2:00:00 PM Central European Standard Time
End:
Monday, March 25, 2024 at 3:30:00 PM Central European Standard Time
Indico page:
Mar 18, 2024
Unraveling cosmology with cosmic voids
Alice Pisani (Princeton University)
See more Hide
Description :
Modern surveys provide access to high-quality measurements on large areas of the sky, sampling the galaxy distribution in detail also in the emptiest regions, voids. Void cosmology is becoming an increasingly active sector of galaxy clustering analysis: by measuring void properties, such as density profiles or void number counts, it is possible to constrain cosmological parameters. Cosmic voids are particularly sensitive to the properties of dark energy and neutrinos, and are a powerful tool to test modifications of the laws of general relativity. Studying voids provides a novel perspective to unravel the unsolved mysteries of our Universe. 
In this talk I introduce cosmic voids as a tool for cosmology, I present recent results and I discuss current challenges and future developments in the field.
 
Document to collect questions:
Start:
Monday, March 18, 2024 at 2:00:00 PM Central European Standard Time
End:
Monday, March 18, 2024 at 3:30:00 PM Central European Standard Time
Indico page:
Mar 11, 2024
Dark Matter Beyond WIMPs
Nicolás Bernal (Universidad Antonio Nariño)
See more Hide
Description :

The existence of nonbaryonic dark matter (DM) in the Universe is compelling, as suggested by astrophysical and cosmological observations. The most commonly assumed production mechanism for DM in the early universe corresponds to the weakly interacting massive particle (WIMP) paradigm, in which DM has mass and couplings at the electroweak scale. However, the current null experimental results and severe constraints on the natural parameter space are forcing us to search beyond the standard WIMP paradigm. In this talk, I will review alternative DM production mechanisms in the early universe, both thermal and non-thermal, like the FIMP and the SIMP paradigms. The possible impact of alternative non-standard cosmological scenarios will also be analyzed. Finally, experimental avenues for DM detection are discussed.

Document to collect questions:

https://docs.google.com/document/d/1_NEaFIEQfeKQCADn3IKZEznWSi6OYO5WGSslyQbe5-A/edit

Start:
Monday, March 11, 2024 at 2:00:00 PM Central European Standard Time
End:
Monday, March 11, 2024 at 3:30:00 PM Central European Standard Time
Indico page:
Feb 5, 2024
Neutrino tagging
Mathieu Perrin-Terrin (Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France)
See more Hide
Description :

Neutrino tagging is a new experimental method for accelerator based neutrino experiments. The method consists in exploiting the neutrino production mechanism, the $\pi^\pm\to\mu^\pm \nu_\mu$ decay, to kinematically reconstruct the neutrino properties from the decay incoming and outgoing charged particles. The reconstruction of these particles relies on the recent progress and on-going developments in silicon particle detector technology. The method is particularly suited to study neutrino interactions at short baseline experiments and neutrino oscillations at long baseline ones with mega-ton scale natural water Cherenkov detectors.

After introducing the method, its benefits, and the sensitivity to key observables it would offer, the seminar will discuss its implementation. The discussion will start with a presentation of the recent proof-of-principle of the tagging technique, performed using the CERN NA62 experiment as a miniature tagged neutrino experiment. Then, ideas on how to implement a full scale tagged experiment will be presented in particular regarding the beam line design and the silicon pixel technology.

Start:
Monday, February 5, 2024 at 2:00:00 PM Central European Standard Time
End:
Monday, February 5, 2024 at 3:30:00 PM Central European Standard Time
Indico page:
Dec 4, 2023
3rd Year PhD Student Presentations
See more Hide
Start:
Monday, December 4, 2023 at 2:00:00 PM Central European Standard Time
End:
Monday, December 4, 2023 at 3:30:00 PM Central European Standard Time
Indico page: