SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 29 kwietnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„The NOvA Experiment and Neutrino Oscillations”

Referuje: Dr Tomas Nosek (NCBJ)

Abstract:

NOvA is a two detector long-baseline neutrino oscillation experiment using Fermilab’s 700 kW NuMI neutrino beam. It studies the disappearance of muon (anti)neutrinos and the appearance of electron (anti)neutrinos in the beam over a distance of 810 km between the detectors.
The experiment has made over 4σ-significant observation of electron antineutrino appearance in muon antineutrino beam and constrained the oscillation parameters |∆m2 32|, sin2 θ23, and δCP. In this seminar, I will present the main features of the NOvA experimental setup and the neutrino oscillation analysis within the standard paradigm of three neutrinos mixing. I will point out the key differences to the similar T2K experiment and its complementarity. I will review the 2020 results of NOvA and T2K and remind the potential of their combined analysis, which has the power to break the degeneracies of the individual measurements. By continuing to collect data before the dawn of next-generation long-baseline experiments in the late 2020s, the statistical uncertainty will be reduced, and certain physics milestones might be within reach. To that end, it is vital to understand the major sources of systematic uncertainties and their correlations for both the interpretation and precision of the results and for further improvements of the analyses.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 22 kwietnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„The b-physics with the CMS experiment – an update”

Referuje: dr hab. Marcin Konecki, prof. UW

Abstract:

CMS is a general purpose experiment at the LHC, designed for a rich physics program that includes b-physics studies.
Selected recent CMS results in b-physics will be presented: measurement of CP-violation phase Phi_s, results on B^0/B^0_s
decaying to mu^+ mu^- and observations of new states and decay modes in b-sector.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 08 kwietnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Digital Signal and Image Processing in Jagiellonian Positron Emission
Tomography”

Referuje: Dr Lech Raczyński (NCBJ)

Abstract:

This presentation is devoted to introduction of data processing algorithms in Jagiellonian PET (J-PET) scanner. In contrast to state-of-the-art PET scanners, in the J-PET detector multiple small inorganic crystal scintillators are replaced with a long plastic scintillator strips. The operational principles of the J-PET scanner are similar to conventional tomographs, except that the highly accurate time information is of paramount importance. Therefore, the J-PET scanner demands a preparation of novel methods on each step of the data processing. The goal of the work presented in this talk is a development of the signal and image processing algorithms taking into account uniqueness of the J-PET detector. The proposed methods include: signal recovery based on samples of a waveform registered on photomultiplier output,reconstruction of position of interaction of annihilation photon in the scintillator strip,classification of PET events types and image reconstruction that operates exclusively in the image space.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 1 kwietnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Development of nuclear reactors – 4th generation reactors, SMRs and others. Nuclear options for the Polish energy transformation”

Referuje: Prof. Wacław Gudowski

Abstract:

Almost 21 years have passed since Gen IV – Generation IV International Forum (GIF) has been founded in 2001 as a co-operative international endeavour which was set up to carry out the research and development needed to establish the feasibility and performance capabilities of the next, advanced generation of nuclear energy systems.

The program, organizational structure and main achievements and weaknesses of GIF will be presented in the first part of the seminar. Then other modern reactor types not officially belonging to the Gen IV will be presented and briefly assessed. The focus of the presentation will then shift to the description and assessment of the high temperature gas cooled reactor – HTGR/HTR and its nuclear fuel – TRISO.

The various options for solving the problem of USED rather than SPENT nuclear fuel will be briefly described and assessed, including ADS technology, i.e. accelerator-driven subcritical systems.

Finally, possible options for nuclear energy for heat and electricity generation in the Polish energysystem transformation program will be presented. Is there any BEST OPTION?
A Q & A session will follow the seminar.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 25 marca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„From anti-neutrinos to anti-electrons: PET research at the University of Texas at Austin”

Referuje: Prof. Karol Lang (University of Texas at Austin)

Abstract:

Research in fundamental experimental particle physics requires new experiments and novel detectors. Knowledge and experience gained in these endeavors can generate spinoffs that benefit fields outside of particle physics. In this talk, we will describe our work on building a time-of-flight positron-emission-tomography (PET) scanner for proton therapy at MD Anderson in Houston and some other related ideas towards improving and expanding the use of PET detectors.

Karol Lang mini-bio:
Karol Lang is an experimental particle physicist and Jane and Roland Blumberg Professor of Physics at the University of Texas at Austin. He graduated with MSc from Warsaw University. He received his Ph.D. from the University of Rochester participating in an experiment that searched for neutrino oscillations. As a postdoc, Lang worked at SLAC (Stanford) measuring the spin content of the nucleon and on an electron beam dump search for low-mass axions. He then worked at Stanford on a search for KL–>mu-e decays at BNL and a search for the H dibaryon. Lang joined the faculty at the University of Texas at Austin shortly before the Superconducting Super Collider (SSC) was cancelled in 1993. He is now involved in long baseline neutrino oscillations experiments and searches for neutrinoless double beta decay.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 18 marca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Cross section measurement of the charged current muon antineutrino single π- production at T2K”

Referuje: mgr Grzegorz Zarnecki (National Centre for Nuclear Research)

Abstract:

T2K experiment is a long baseline neutrino oscillation experiment in Japan. Cross section measurements of (anti)neutrino interactions in sub-GeV to few GeV energy range allow to constrain the systematic uncertainties in the oscillation analysis. Single charged pion production is a elevant interaction mode at this energy scale.

In this seminar I will present the cross section measurement of single π- production in muon antineutrino CC interaction on hydrocarbon. The cross section is reported as double-differential in muon kinematical variables i.e. momentum and cosine of the muon emission polar angle.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 11 marca (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Status of LSND/MiniBooNE, Reactor and Gallium Anomalies and Sterile Neutrino Searches”

Referuje: Dr hab. Katarzyna Grzelak

Abstract:

Three different anomalies at accelerator, reactor and radio-chemical neutrino experiments have brought attention to the searches for sterile neutrinos in the last decade.
Numerous experiments have been launched to check whether sterile neutrino oscillations can be responsible for the experimental findings. During the seminar the status of experimental searches for sterile neutrino oscillations and new results from MicroBooNE, PROSPECT and BEST will be
presented.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 27 stycznia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„How to detect GeV neutrinos using a magnetised detector? Iron Calorimeter @ India-based Neutrino Observatory”

Referuje: Dr Lakshmi S.Mohan (NCBJ)

Abstract:

India-based Neutrino Observatory (INO) is a proposed underground lab to house a 50 kilo ton magnetised Iron Calorimeter (ICAL) detector to detect atmospheric neutrinos. The detector, mainly optimised for the detection of GeV muons will be able to separate μ− and μ+ from the charged current interaction of atmospheric muon neutrinos and muon antineutrinos respectively. The main goal of the experiment is to make use of Earth matter effects and determine neutrino mass hierarchy. It will consist of resistive plate chambers (RPCs) as the active detector elements and iron as neutrino target. I will give a brief summary of the R&D activities for ICAL experiment and some of its projected sensitivities to 2–3 neutrino oscillation
parameters.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

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

seminarium, na którym zostanie wygłoszony referat pt.:

„T2K Near Detector Fit -Exclusive Behind the Scenes Materials.”

Referuje: Kamil Skwarczyński

T2K (Tokai to Kamioka) is a long-baseline neutrino oscillation experiment located in Japan. One of the most challenging tasks of T2K is to study whether CP is violated in the lepton sector, which is suggested by recent T2K results. By utilizing the near detector (ND280) data, T2K can constrain neutrino interaction and flux uncertainties by fitting a parameterized model to data. This allows for a significant reduction of the systematic uncertainties in neutrino oscillation analyses.

One of two fitters responsible for ND fit uses Markov Chain Monte Carlo (MCMC) Method. Great benefit of MCMC is that it returns distribution for each parameter rather than one just one best fit value. ND280 fit analysis, planned to be released this year, introduced lots of improvement, including the new photon-proton selection and new systematic parameter giving lots of freedom in nuclear effect description like Short Range Correlations and Pauli Blocking.

Serdecznie zapraszamy

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

High Energy Physics Seminar (21 January 2022) · Indico (cern.ch)

 

SEMINARIUM FIZYKI WIELKICH ENERGII

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

seminarium, na którym zostanie wygłoszony referat pt.:

„The charm of charm, i.e. how the LHCb is looking for new physics in precise measurements of CP violation effects in charm particle decays.”

Referuje: Dr Artur Ukleja

Abstract

The phenomenon of CP violation is one of the least-known part of the Standard Model. Its existence means that the laws of physics change if a particle is replaced by its antiparticle and the directions of all coordinates are changed. The known value of CP violation is too small to explain the existing matter domination over antimatter in the universe. This asymmetry (observed in cosmology) requires much larger value of CP violation than in the Standard Model.

In addition, CP violation phenomenon is related to basic problems of particle physics. Perhaps here is the answer why there are three generations of quarks and leptons. So far, it has been known only that this is the smallest number that allows the introduction of a non-zero weak phase describing CP violation in the Cabibbo–Kobayashi–Maskawa matrix.

Therefore, the main goal of High Energy Physics is a search for new sources of CP violation beyond the Standard Model (called new physics). The measurements in particle decays containing a charm quark create perfect environment for the new physics searches since the background from the Standard Model is small (the expected values of CP violation are about a few per milles or less). On the other hand, very sophisticated research methods are needed to be sensitive for such small effects. The examples of such methods use in the LHCb experiment at CERN I will present during seminar. Their measurements I will show in searches for CP violation in charm particle decays (mesons and baryons). These will be examples of measurements obtained in both two- and three-body decays. Although the three-body processes are always more rare than the two-body processes, they can provide much more information about CP violation. Many observables are available to measure in multi-body processes. In contrast, in two-body processes, only one variable is measured (global result of CP violation).

Serdecznie zapraszamy

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

High Energy Physics Seminar (14 January 2022) · Indico (cern.ch)