Month: Maj 2023

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 2 czerwca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Tau neutrinos. What do we know? What can we learn from them?”

Referuje: dr hab. Katarzyna Grzelak (IFD UW)

Tau neutrinos are the least studied leptons. Due to difficulty in distinguishing tau neutrinos from other neutrino flavours, low cross-section and high threshold energy for charged-current interactions only 19 tau neutrino candidates have been event-by-event selected to date.

In the seminar the current status of tau neutrino-related physics, new experiments and new ideas to improve our knowledge of lepton sector will be presented.

Serdecznie zapraszamy

dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki

SEMINARIUM FIZYKI WIELKICH ENERG

Dnia 26 maja (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Gravitational wave astrophysics at the beginning of O4”

Referuje: prof. dr hab. Tomasz Bulik (OA UW)

Abstract

The O4 observational run is starting now. I will review the current
detections and their significance for astronomy and fundamental physics.
As the bulk of detections are binary black holes I will describe the
currently considered models of their formation and compare
the predictions of these models with the data.
Finally I will talk about hopes for the O4 run

.

Serdecznie zapraszamy

dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 19 maja (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Towards identifying the sources of Ultra-High Energy Cosmic Rays with the GRAND experiment”

Referuje: dr Lech Wiktor Piotrowski (IFD)

Even though the first UHECR was detected almost 60 years ago, the origin of these particles remains a mystery. For lower energies, their paths are twisted by the Galactic magnetic field, while for higher energies their fluxes are extremely low. That makes identifying the sources unreachable even for the largest existing observatories, that occupy hundreds to thousands of square kilometres.

The problem of the low flux can be solved with building observatories that observe orders of magnitude larger volume of the atmosphere than the current ones. In addition, looking not directly at UHECR, but at neutrinos generated by them close to the source, can eliminate the influence of cosmic magnetic fields. These two ideas will be incorporated into the Giant Radio Array for Neutrino Detection (GRAND) – a future experiment to detect Earth-skimming neutrinos with huge arrays of cheap radio antennas.

The contents of the seminar will include the idea behind the radio detection of UHE CRs and neutrinos, current status of GRAND prototypes, the role of the Polish group and the experimental challenges that we are facing.

Serdecznie zapraszamy

dr hab. Katarzyna Grzelak
prof. dr hab. Jan Królikowski
prof. dr hab. Aleksander Filip Żarnecki