Najbliższe seminaria odbywające się w Instytucie

Seminarium Zakładu Fizyki Neutrin

27.3.2023 Kamil Skwarczyński
Constraining neutrino cross-section and flux models using T2K Near Detector with proton information in Markov chain Monte Carlo framework

T2K is a long-baseline neutrino oscillation experiment, which studies the oscillations of neutrinos from a beam produced using the J-PARC accelerator chain. The neutrino beam propagates over 295 km before reaching the Super-Kamiokande detector, where they can be detected after having oscillated. The ability of the experiment to run with either neutrino beams or anti-neutrino beam makes it well suited to study the differences between the oscillations of neutrinos, in particular to look for a possible violation of CP symmetry in the lepton sector. T2K has produced a new analysis of its first 10 years of data, with improved models to describe neutrino interactions and fluxes as well as additional samples of near and far detector events. We will present the results of the measurement of the parameters describing neutrino oscillations obtained with the new analysis.

Godz.: 12:00, Sala: 412, Wersja do druku

Seminarium Instytutu

24.3.2023 Tomasz Trześniewski
Gravity - classical, quantum and phenomenology, in the context of the 59th Karpacz Winter School in Theoretical Physics

The 59th Winter School of Theoretical Physics (12th-21st February this year) was organized by our Institute together with a COST Action CA 18108 "Quantum gravity phenomenology in the multi-messenger approach", for which it was the Third Training School. The subject matter of the School touched upon different areas of research framed by the title "Gravity - Classical, Quantum and Phenomenology". Namely, the six lecture series were devoted to: asymptotic symmetries of the gravitational field (at the so-called corners), the perturbative framework for gravitational waves emitted by black holes, the theoretical grounds and practical methods of observational cosmology, models of modified gravity and bounds imposed on them by observations, the status and prospects of phenomenology of quantum gravity, and analysis of the gamma-ray telescopes data in the context of Lorentz invariance violation. The investigations of topics discussed in the lectures, and many others related to them, are motivated in particular by the search for signatures (i.e. phenomenology) of Planck-scale physics in the observations of various cosmic messengers, i.e. (ultra-high-energy) cosmic rays, astrophysical neutrinos, gamma-ray bursts and gravitational waves. This approach to the problem of quantization of gravity has recently been summarized in an extensive review published by the COST Action.

Godz.: 12:15, Sala: 422, Wersja do druku
31.3.2023 Gerd Röpke (University of Rostock & IFT)
Clusters and few-body correlations in hot and dense nuclear matter

A Green's function approach is used to investigate correlations and cluster formation of nucleons in nuclear matter at temperatures up to 100 MeV. This thermodynamic Green's function approach is applied to hadronic matter at subsaturation densities where light nuclei as well as continuum correlations determine the thermodynamic and transport properties, in particular phase transitions and neutrino transport. The quantum statistical approach is also applied to hadronization phenomena in the quark-gluon plasma, which occur at higher densities and temperatures. Clusters are described as quasiparticles, medium modifications owing to self-energy terms and Pauli-blocking effects are calculated. In particular, the role of unstable nuclei is investigated. The treatment of correlations and cluster formation is of interest to astrophysics, for example, the structure and temporal evolution of neutron stars. In laboratory experiments, properties of matter at extreme energy densities are investigated with heavy-ion collisions, e.g., at LHC. Medium modifications as well as nonequilibrium approaches are applied to explain the observed yields of light clusters.

Godz.: 12:15, Sala: 60, Wersja do druku