Author: Wojciech Orpel

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 14 czerwca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Latest Results from Tau Neutrino Appearance Measurements at Super-Kamiokande”

Referuje: Maitrayee Mandal (NCBJ)

The Super-Kamiokande (SK) experiment, a water Cherenkov detector located in Japan. Since 1996, SK has been collecting data on muon and electron neutrinos being produced by cosmic rays in the atmosphere. Tau neutrinos are expected to appear in this flux of atmospheric neutrinos due to neutrino oscillations. In this seminar, I will discuss the measurements of tau neutrino appearance covering an exposure of 484 kton-years at SK, with which, we exclude the hypothesis of no tau neutrino appearance at 4.8 sigma.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 7 czerwca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„The Muon Shot – Combining Energy with Precision”

Referuje: Dr. Juergen Reuter (DESY, Hamburg)

  Muon colliders have been recently regained a lot of interest, pointed out in the US Strategy process in 2023 (P5 report). They combine both the amazing cleanliness and precision of lepton collisions with the energy range of 10 TeV „parton level” collisions. In this talk I will briefly review the muon collider proposal and then focus on selected physics topics like sensitivity to anomalous muon-Higgs couplings, the search for new heavy Z’ gauge bosons, searches for heavy neutral leptons and the delicacies of precision calculations and simulations at high-energy muon colliders

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„The Standard Model electroweak sector after Run 2 – selective review of CMS results”

Referuje: dr hab. Michał Szleper, prof. NCBJ  (NCBJ)

  Run 2 of the Large Hadron Collider has produced a lot of results from the electroweak sector of the Standard Model. This includes measurements that shed light on the interactions between vector bosons – triple and quartic gauge couplings – based on a variety of physics processes: from inclusive diboson production to single boson in vector boson fusion mode, vector boson scattering and triboson production. In this seminar we will review the importance and role of triple and quartic gauge couplings in the search for physics beyond the Standard Model and how we measure them. I will give an overview of CMS results obtained from Run 2 data and discuss what should and can be improved in Run 3 and the HL-LHC.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„Recent results from COMPASS on the GPD program”

Referuje: prof. dr hab. Andrzej Sandacz  (Dep. of Fundamental Research, NCBJ)

Generalised Parton Distrbutions (GPDs) provide 3-D description of the nucleon structure. They encompass 1-D description by PDFs or by form factors. The two most appealing goals of the GPD studies are: the „nucleon tomography” and the role of the orbital momenta of quarks and gluons in  explaining „nucleon spin crisis”. 

After an introduction to the GPDs, the upgrade of the experimental setup, which was  essential for the COMPASS GPD program, will be briefly described. The discussion of results for investigated three channels of  exclusive pseudo-scalar or vector mesons production will follow.They consitute an important input for modelling GPDs. In particular, in the context of the phenomenological Goloskokov-Kroll model they provide a clear evidence for the parton helicity-flip (chiral-odd) GPDs.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„The future of multidimensional phase space in collider physics”

Referuje: dr Alibordi Muhammad (IFD UW)

The Large Hadron Collider is consistently increasing the luminosity and the energy. This will help the experimentalists to search for new physics beyond the standard model. Simultaneously this high amount of data requires a much more sophisticated data analysis approach. It requires a deeper  understanding of the problem both in statistical and computational sense than ever before. This talk will make a surface level review of some of these aspects.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„Transverse-spin asymmetries in COMPASS Drell-Yan data „

Referuje: mgr Małgorzata Niemiec (IFD UW)

After nearly 60 years of extensive experimental and theoretical studies, several aspects of the nucleon structure are still poorly known. While main  efforts focuse on its collinear structure, measurements of transverse parton momenta are scarce and their analysis complicated.

They involve measuring cross-section asymmetries in reactions like semi-inclusive deep inelastic scattering or Drell-Yan processes.

In 2015 and 2018 the COMPASS Collaboration at CERN performed measurements of the Drell-Yan process π−p → μ+μ−X at 190 GeV/c pion beam and transversely polarised NH3 target. This presentation covers a description of the measurement of Transverse Spin Asymmetries in the Drell-Yan process, and in particular of a novel approach, in contrast to the conventional one, where the asymmetries are weighted by powers of a transverse momentum of the dimuon system with respect to the beam.

This presentation is an extended version of a talk given on behalf of the COMPASS Collaboration  at the International Workshop on Deep Inelastic Scattering and Related Subjects, DIS2024, in Grenoble (France), 8-14 April, 2024.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 12 kwietnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„T2K+NOvA Joint Neutrino Oscillation Analysis”

Referuje: dr Tomas Nosek (NCBJ)

The T2K and NOvA experiments are the two currently active long-baseLine (LBL)

experiments to measure the phenomenon of neutrino oscillations. This talk presents a

joint T2K+NOvA neutrino oscillation analysis within the standard three active neutrino

flavors paradigm, which includes each experiment’s fully detailed detector simulations

and takes advantage of the complementary oscillation baselines of 295 km and

810 km and neutrino energies around 0.6 GeV and 2 GeV for T2K and NOvA, respectively.

The T2K and NOvA collaborations have worked together on a joint analysis

of the two experiments’ data, hoping to use the differing physics sensitivities to paint

the clearest picture of neutrino oscillations from LBL experiments. Within a unified

Bayesian inference, the results from the first T2K+NOvA joint neutrino oscillation

measurement will be discussed.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 5 kwietnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Construction of the research high temperature gas-cooled reactor HTGR-POLA (POLish Atomic) in Świerk”

Referuje: prof. dr hab. Mariusz P. Dąbrowski (NCBJ)

High-temperature nuclear reactors produce heat at the temperature range (from over 500 ⁰C to even 1000 ⁰C) which is hardly achievable by any light water reactor (approx. 300 ⁰C). In view of that they are ideal for decarbonization of the Polish chemical and petrochemical industry which requires the high temperature steam. NCBJ has been carrying out preparatory work in various areas (legal, social, organizational, technical) for the construction of this type of reactors in Poland for nearly a decade. Now the NCBJ experts plan to build a research-demo reactor at Świerk in order to gain experience towards industrial implementation of this technology. Due to the fund from the Ministry of Science and Higher Education (agreement 1/HTGR/2021/14), the elaboration of the so-called basic design of such a reactor is being carried on. This happens in cooperation with the Japan Atomic Energy Agency, which possesses similar, though not updated to current trends in polygeneration (production electricity, heat, hydrogen etc.), research device – HTTR. The reactor traditionally carrying feminine name “POLA” will have a power of 30 MW thermal and will operate continuously using the energy produced for NCBJ’s own purposes (electricity production, municipal heat) and for an industrial test installations using high-temperature steam at 560 ⁰C. The aim of the seminar will be to present the context, assumptions, status of current work on the reactor design and the prospects for its rapid construction.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 22 marca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Exotic searches with the CMS detector at the CERN LHC”

Referuje: dr Małgorzata Kazana (NCBJ)

LHC scientists extend searches for new particles using advanced techniques and exploring exotic signatures. The report on results obtained by the CMS experiment with LHC Run-2 (mainly) and Run-3 data will be given.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„Quantum Information at Colliders”

Referuje: dr hab. Kazuki Sakurai, prof. UW (IFT UW)

Quantities and concepts in quantum information theory (QIT), such as entropy and Bell-nonlocality, play an important role in the development of quantum technologies as well as in deepening our understanding of quantum field theory and gravity.  Recently, an effort to observe QIT quantities at the LHC and future colliders has been started and attracted attention.  In this talk, after briefly reviewing the recent progress on this topic, I will present my recent works based on 2211.10513 and 2310.01477.  The first part is a study of observing the spin-entanglement of two tau-leptons produced from the Higgs decay.  The second part concerns entanglement among three particles in 3-body particle decays.

Serdecznie zapraszamy

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