Month: Październik 2022

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 28 Października(piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Neutrino news from summer conferences”

Referuje: dr Joanna Zalipska (NCBJ)

Abstract:

  This seminar will summarize results related to neutrino physics from summer conferences such as Neutrino 2022 and ICHEP 2022. The overview of the Long Baseline neutrino experiments current (T2K, Nova) and future (Hyper-Kamiokande, DUNE) will be presented. On top of it the direct neutrino masses searches will be discussed showing latest results from KATRIN experiment together with plans of future experiments.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 21 Października(piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„ECFA workshops on e+e- Higgs/EW/Top factory”

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

Abstract:

Based on the recommendations of the Update of the European Strategy for Particle Physics, the European Committee for Future Accelerators (ECFA) has decided to organise a series of workshops on physics studies, experiment design and detector technologies towards a future electron-positron Higgs/EW/Top factory.

Three Working Groups were established, led by conveners from both experiment and theory, on Physics Potential (WG1), Physics Analysis Methods (WG2) and Detector R&D (WG3). The first community-wide plenary ECFA workshop e+e- Higgs/EW/Top factory took place recently at DESY, Hamburg. I will report on the DESY meeting and the ECFA initiative in general.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 14 Października(piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Studies of hyperon decays using hyperon-antihyperon pairs from J/psi decays”

Referuje: prof. dr hab. Andrzej Kupść  (Uppsala University & BP3 NCBJ)

Abstract:

Hyperon-antihyperon pairs from decays of vector charmonia are spin entangled. Furthermore, if the charmonia are produced in electron-positron collisions the hyperons can be polarized. Millions of the hyperon–antihyperon pairs events are available in the world’s largest data of 10^10 J/psi and 2.7×10^9 psi(2S) collected at the BESIII experiment . The entangled pairs are used for precision determination of hyperon and antihyperon decay amplitudes and to test CP symmetry in the decays. The hyperon CP-symmetry tests are complementary to the direct CP-violation studies in kaon decays. I will present multi-dimensional analysis methods, developed by the Uppsala and Warsaw groups, that make use of the polarization and entanglement to achieve best sensitivity in the hyperon-decay measurements. Recent BESIII results obtained using these methods include studies of J/psi decays into Lambda-antiLambda and Xi- anti Xi+ published in Phys. Rev. Lett. and Nature, respectively. For the cascade decay chain, the exclusive measurement allows for three independent CP tests and determination of the strong and weak phase differences in the decay amplitudes.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 7 Października (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„COMPASS – a versatile facility at CERN”

Referuje: prof. dr hab. Barbara Badełek  (IFD UW)

Abstract:

The purpose of COMPASS is the study of hadron structure and hadron spectroscopy with high intensity muon and hadron beams.

The Collaboration is formed by about 200 physicists from 25 countries.

The facility was approved 25 years ago and the physics experiments started in 2002  with a muon beam, polarised proton and deuteron targets. These semi-inclusive deep inelastic scattering (SIDIS) reveals a detailed  quark-gluon structure of the nucleon, in particular the gluon polarisation and transverse-momentum-dependent correlations.

The years 2008 and 2009 were dedicated to the hadron spectroscopy programme with pion and proton beams scattering off a liquid hydrogen target and nuclear targets. An unprecedented amount of data was collected and showed subtle details of the light-meson spectrum. A dedicated study of the pion polarisability using Primakoff scattering of pions from heavy nuclei was also performed.

Phase II of COMPASS commenced in 2014 and is primarily devoted to the transverse and 3D structure of nucleons using Deeply Virtual Compton scattering (DVCS), Hard Exclusive Meson Production (HEMP), SIDIS and polarised Drell-Yan (DY) reactions.

I shall repeat a plenary talk which I gave in September 2022 at the „Quarks in Nuclear Physics” conference in Florida (USA).

Serdecznie zapraszamy

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