"High Energy, Cosmology and Astro-particle Physics (HECA)" Seminar
2020/2021 | 2021/2022 | 2022/2023 | 2023/2024 | 2024/2025 | Seminar homepage
join us at 11:15
(University of Warsaw)
Monopole and Exotics Detector at the LHC (MoEDAL) is a mostly passive detector located in the LHCb cavern, just outside LHCb detector. MoEDAL was designed to search for magnetic monopoles, but it also sensitive to long-lived charged particles.A certain class of neutrino mass models predicts long-lived particles whose electric charge is four or three times larger than that of protons. Such particles, if they are light enough, may be produced at the LHC and detected. We investigate the possibility of observing those long-lived multi-charged particles with the MoEDAL detector.To demonstrate the performance of MoEDAL on multi-charged long-lived particles, two concrete neutrino mass models are studied. In the first model, the new physics sector is non-coloured and contains long-lived particles with electric charges 2, 3 and 4. The second model has a coloured new physics sector, which possesses long-lived particles with electric charges 4/3, 7/3 and 10/3. We explore the parameter space of these models and identify the regions that can be probed with MoEDAL at the end of Run-3 and the High-Luminosity LHC.
room B2.38, Pasteura 5 at 11:15
(Astrocent, Warsaw)
New physics has traditionally been expected in the high-pT region at high-energy collider experiments. If new particles are light and weakly-coupled, however, this focus may be misguided: light particles are typically highly concentrated within a few mrad of the beam line. This opens up a novel direction in the LHC searches focusing on sub-GeV new particles and neutrino physics, which will be initiated by the FASER experiment during Run 3. In the talk, we will discuss the prospects of these and other related efforts that can extend towards the High-Luminosity phase of the LHC or even future proposed colliders. The focus of the talk will be on presenting the fields in both the Standard Model (SM) of particle physics and beyond the SM that could benefit from this research agenda.
join us at 11:15
(University of Helsinki)
join us at 11:15
(University of Warsaw)
Feebly interacting massive particles (FIMPs), contrasting with weakly interacting massive particles (WIMPs), is an intriguing dark matter candidate. Light (keV-scale) FIMPs produced by the freeze-in mechanism is of particular interest in that the structure formation of the Universe with FIMPs differs from that with WIMPs on galactic scales. The galactic-scale structure formation has been probed in many independent ways: Lyman-alpha forest spectra and the number of satellite galaxies in the Milky Way. We discuss the current constraints from observed galactic-scale structure and future prospects. Particular stress is placed on that the details of the production processes can impact the obtained constraints.
http://meet.google.com/cgk-onvf-iuk
