Zakład Cząstek i Oddziaływań Fundamentalnych

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„KM3NeT experiment: overview and recent results”

Referuje: mgr inż. Piotr Kalaczyński (AstroCeNT)

Although intensively studied in the last decades, neutrinos still hold a number of mysteries. KM3NeT is a project aiming to uncover these. The KM3NeT experiment consists of two underwater Cherenkov neutrino telescopes, currently under construction at two different locations in the Mediterranean Sea. The KM3NeT detectors collect vast amounts of data already in their intermediate configurations. This includes sufficient number of atmospheric neutrinos to observe neutrino oscillations and perform first astrophysical neutrino searches. This talk describes the KM3NeT detectors and their basic physics programme, including results obtained with data from the early detector configurations.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 8 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Jack Steinberger (1920-2020) – in memoriam on the third anniversary of his death.”

Referuje: prof. dr hab. Jan Królikowski (IFD,UW)

Jack Hans Steinberger (1921- 2020) was an outstanding experimental particle physicist. Among his discoveries/ measurements are proof of the three-body decay of a muon (PhD 1949 ), the discovery of the π0 meson, practical implementation of the bubble chambers as a tool for accelerator physics (BNL 195-1963), experimental discovery of the difference between muon and electron neutrinos (Nobel Prize 1988 with L.

Lederman and M. Schwarz), a plethora of precise measurements of the mixing and CPV in the neutral kaon system (Columbia and CERN), precise measurements of neutrino interactions with iron. (CDHS(W) experiment), ALEPH experiment at LEP.

I worked with Jack in the CHSW neutrino experiment during the 1979-1989 decade. I learned from him a lot.  At the third anniversary of His death, I would like to give a commemorative talk discussing His experimental heritage, focusing on the not so well known earlier results.

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 1 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Neutrino oscillations – review of current experimental results”

Referuje: dr hab. Justyna Łagoda, prof NCBJ

The existence of neutrino oscillations was confirmed 25 years ago.

Since that time, a lot of experiments have been performed with different sources of neutrinos and detection techniques.

Now, we know the values of the neutrino mixing angles with quite good precision, yet there are still questions to be answered, such as the neutrino mass ordering, CP-violation in the neutrino sector, or the existence of sterile neutrinos. The presentation is an extended and updated talk given at the EPS HEP 2023 conference and will summarize the current knowledge of neutrino oscillations and present recent results from selected experiments as well as some perspectives for the future.

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 24 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„The LUXE – Laser und XFEL Experiment – Report from the “LUXE physics and SFQED workshop” and LUXE Collaboration Meeting”

Referuje: dr hab. Grzegorz Grzelak (IFD,UW)

In the seminar I will present the progress in the preparation of the LUXE experiment after publishing in 2023 the TDR:

Technical Design Report.

LUXE is an experiment currently being developed at DESY in Hamburg, that aims to use the high-quality electron beam of the European XFEL facility and a high-power optical laser.

The scientific goal of the experiment is to study quantum electrodynamics in the largely unexplored territory, in the regime of strong fields (SFQED), close to and beyond the Schwinger limit, revealing the non-perturbative face of QED.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 17 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Heavy flavour physics 2.0 (LHCb Upgrades)”

Referuje: dr hab. Agnieszka Obłąkowska-Mucha, prof AGH (AGH)

LHCb has undergone a major upgrade during LHC LS2 (2019-2022) to cope with increased instantaneous luminosities, a full software-based trigger, and real-time analysis. This talk will include the very fresh LHCb results, the performance of the real-time readout system, and plans for the long-lived particle reconstruction. Further upgrades and reconstruction challenges for LHC Run 4 and 5 will also be discussed.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„The Level-1 muon trigger of the CMS experiment”

Referuje: dr hab. Marcin Konecki, prof. UW (IFD UW)

The event selection in the CMS experiment is necessary to reduce the LHC event rate down to O(1kHz) suitable for event storage.

This selection is done by the two stage trigger. The CMS level-1 muon trigger, is custom-hardware device, processing signals from CMS muon detectors.

In the presentation the evolution and the performance of the Level-1 muon trigger system is discussed.

The perspectives for upgrade for LHC Phase-II are given.

The activities of Warsaw Group, responsible for the trigger operation in a barrel-endcap overlap of the CMS detector, are emphasized.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 27 października (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Second ECFA Workshop on e+e– Higgs/Electroweak/Top Factories”

Referuje: prof. dr hab. Aleksander Filip Żarnecki (IFD UW)

Second ECFA Workshop on physics and detectors for future e+e– Higgs/Electroweak/Top Factories took place two weeks ago in Paestum, Italy. I will report on the mandate, recent activities and plans of the ECFA study. In particular, I will present the so called Focus Topics, which were proposed to stimulate new activities in the field, covering both theory and experiment, analysis and algorithm development, as well as detector requirements and design optimisation. Selected results presented at the workshop will be discussed.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 20 października (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Physics at a muon collider”

Referuje: mgr Krzysztof Mękała (IFD UW)

Among future collider proposals, the idea of building a muon collider has recently been getting more and more attention. As a concept combining the advantages of electron-positron and hadron machines, a muon collider is an ideal candidate for the future large-scale project for particle physics.

Nevertheless, for a long time, the completion of the project has been perceived as being technically unattainable due to the finite lifetime of a muon. However, in recent reports, no insurmountable technological issues have been identified and vivid discussion of the physics potential of such a machine has restarted. In my talk, I will outline the technical concept, demonstrating why the machine seems to be so appealing despite several outstanding technological challenges and I will explain what kind of new physics could be measured at a multi-TeV muon collider.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 6 października (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„DNA damage and repair in cells exposed to high and low LET”

Referuje: dr hab. Beata Brzozowska (IFD UW)

The DNA damage response to different radiation qualities reflects their mode of action. Cells exposed to densely ionising high and scattered low linear energy transfer (LET) radiation react more strongly than to the same dose of each separately. The relationship between DNA double strand break location inside the nucleus and chromatin structure was evaluated using high-resolution transmission electron microscopy in breast cancer cells and will be presented together with fluorescence microscopic data.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 16 czerwca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Analysing Ultra High Energy Cosmic Ray Air Showers with GRANDProto300”

Referuje: dr Pragati Mitra (IFD UW)

Detecting Ultra High Energy Cosmic Rays (UHECR) and Neutrinos through radio detection is a mature technique that offers a promising avenue for highly inclined air showers. The GRANDProto300 (GP300) array is a pathfinder for the Giant Radio Array for Neutrino Detection (GRAND) project, which will be deployed at a remote mountain site in the Gobi desert, China. Serving as a test bench, the GP300 array is expected to pioneer techniques of autonomous radio detection including identification and reconstruction of nearly horizontal cosmic-ray air showers and shed light on understanding the ‚transition region’ from the galactic to extragalactic cosmic-ray sources. In this seminar, we will explore the prospects of studying air shower parameters with radio technique, then look into the ongoing analysis efforts including offline signal identification and shower reconstruction.

Serdecznie zapraszamy

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