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

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

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

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

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)

SEMINARIUM FIZYKI WIELKICH ENERGII

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 17 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„The ESSnuSB project: measuring CP violation at the 2nd neutrino oscillation maximu,.”

Referuje: Dr Budimir Kliček Ruder Boskovic Institute, Zagreb

Abstract:

ESSnuSB is a design study for an experiment which will measure CP violation in lepton sector by observing neutrino oscillations at the second muon neutrino to electron neutrino oscillation maximum. The signal of CP violation at the second oscillation maximum is expected to be three times larger than at the first one, which significantly increases the ratio between the signal and the systematic uncertainty, and thereby the physical reach of the project. The very intense muon neutrino beam will be generated by uniquely powerful ESS linear proton accelerator, which is currently under construction near Lund, Sweden.
The oscillation signature will be measured by observing neutrino interactions in the large 538 kt fiducial volume of the far water Cherenkov detectors. The experiment will also feature near detectors which will be used to measure neutrino interaction cross-sections and the non-oscillated flux. This seminar will start with a short introduction to CP violation in neutrino oscillations, focusing on the oscillation channels relevant for ESSnuSB. It will continue with the description of the current design of the ESSnuSB experimental setup,
and conclude with the expected physics reach of the project.

 

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 03 grudnia (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Latest results from the NA61/SHINE experiment at CERN.”

Referuje: mgr Piotr Podlaski

Abstract:

NA61/SHINE is a multipurpose fixed-target facility at the CERN Super Proton Synchrotron. The main goals of the NA61/SHINE strong interactions program are to look for the critical point of strongly interacting matter and study properties of the onset of deconfinement. To reach these goals, hadron production measurements are performed in the form of a two-dimensional scan by varying collision energy and system size. Additionally, NA61/SHINE performs reference hadron production measurements for neutrino and cosmic ray experiments.

In this seminar the most recent NA61/SHINE results will be summarized. In particular, results from p+p, Be+Be, Ar+Sc and Pb+Pb reactions on hadron production spectra and fluctuations will be presented. The NA61/SHINE data will be compared with results from other experiments and predictions of various theoretical models. The talk will be concluded with plans and motivation for the NA61/SHINE operation and measurements after Long Shutdown 2 and 3 at the CERN SPS, followed by a brief summary of the ongoing hardware upgrade.

 

Serdecznie zapraszamy

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

High Energy Physics Seminar (3 December 2021) · Indico (cern.ch)

SEMINARIUM FIZYKI WIELKICH ENERGII

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 26 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„ELITPC: the first experiments with the full scale-prototype of an active-target Time Projection Chamber”

Referuje: mgr. Mateusz Fila

Abstract:

An active-target Time Projection Chamber (TPC) has been developed at the University of Warsaw for studying nuclear reactions of astrophysical interest. The flagship experiment of the detector is the measurement of the cross-section of 16O(gamma, alpha)12C photodisintegration reaction down to the energy of 1 MeV in the centre of mass using monochromatic gamma-ray beams at HIgS, USA and ELI-NP, Romania.
In the summer of 2021, the first experiments with the full-scale prototype of the chamber took place at the IFJ PAN Cracow. The performance of the detector was tested in experiment at the Van de Graaf accelerator at the IFJ PAN. The CO2 filled TPC was exposed to the 13 MeV gamma beam produced in the 15N(p, gamma)16O reaction. Events corresponding to the 16O(gamma, alpha)12C photodisintegration reaction were observed.
In another experiment, the neutron beam of IGN-14 MeV neutron generator at the IFJ PAN was used to populate the Hoyle state in in the 12C(n,n’) reaction with CO2 gas inside the detector. The products of 3-alpha decay of the Hoyle state were observed.
Preliminary results of the measurements at IFJ will be presented and an outlook on the experiment at HIgS and plans for ELI-NP will be given.

This scientific work is supported by the Polish Ministry of Science and Higher Education from the funds for years 2019-2021 dedicated to implement the international co-funded project no. 4087/ELI-NP/2018/0, by University of Connecticut under the Collaborative Research Contract no.UConn-LNS_UW/7/2018 and by the National Science Centre, Poland, under Contract no. UMO-2019/33/B/ST2/02176.

Serdecznie zapraszamy

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

High Energy Physics Seminar (26 November 2021) · Indico (cern.ch)

SEMINARIUM FIZYKI WIELKICH ENERGII

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 19 listopada (piątek) o godzinie 10:15, w sali B2.38 odbędzie się

seminarium, na którym zostanie wygłoszony referat pt.:

„Searches for exotic physics by comparing the fundamental properties of antiprotons and protons using Penning Traps at BASE experiment”

Referuje: Barbara Maria Latacz, RIKEN, on behalf of the BASE collaboration

Abstract:

The Standard Model is the most successful theory in physics, however, it does leave several questions open. For example the striking matter-antimatter imbalance in the visible Universe has yet to be understood, and the microscopic properties of dark matter have yet to be discovered. Related questions can be studied by ultra-high precision comparisons of the fundamental properties of protons and antiprotons, like the charge-to-mass ratios or the magnetic moments, which are subject of the experiments of the BASE collaboration at CERN. The core tool of BASE is the spectroscopy of single trapped antiprotons and protons using superconducting detectors in advanced cryogenic Penning trap systems. One
of the state-of-the-art results of the BASE collaboration is the measurement of the antiproton magnetic moment with a fractional precision of 1.5 parts in a billion [C. Smorra et al., Nature 550, 371 (2017)], which improved previous measurements by more than three orders of magnitude. Very recently, BASE extended its experimental program and has
set stringent limits on axion to photon conversion in the neV mass range, using superconducting LC circuits are haloscope detectors
(J. A. Devlin et al., Physical Review Letters 126.4 (2021): 041301).

In my talk, I will summarise the recent achievements of BASE, I will report on the progress in improving the frequency resolution of the experiment, and will outline strategies to further improve our high-precision studies of matter-antimatter symmetry to anticipated precision at the parts per trillion level. I will also summarize progress towards the development of the new broad-band axion haloscope BASE CDM.

 

Serdecznie zapraszamy

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

High Energy Physics Seminar (19 November 2021) · Indico (cern.ch)