Author: Wojciech Orpel

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 26 marca (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„The KATRIN experiment: neutrino mass measurements with sub-eV sensitivity and future prospects”

Referuje: Dr. Alexey Lokhov (University of Muenster)

Arlsruhe TRItium Neutrino experiment (KATRIN) is searching for the signature of the neutrino mass in the endpoint region of the tritium beta-decay spectrum. KATRIN combines a high-intensity gaseous molecular tritium source with a high-resolution spectroscopy using electrostatic filter with magnetic adiabatic collimation to reach the target neutrino-mass sensitivity of 0.2 eV/c2, improving on the previous measurements by an order of magnitude. With the first science run of KATRIN the previous neutrino mass bounds were improved by a factor of two, with the first upper limit of 1.1 eV/c2 (90% CL).

In this talk an overview of the KATRIN experiment and its very recent results are presented. Our preliminary new results reaching a sub-eV neutrino-mass sensitivity based on the whole 2019 data-set will be discussed. In addition, the talk reports on the KATRIN exploration of interesting BSM physics cases and closes with an outlook on the future prospects of KATRIN.

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 19 marca (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Status of the ILC project and news from LCWS’2021”

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

In recent years, momentum has been building for Japan to host the International Linear Collider (ILC). High-level discussions have taken place between the US and Japan, and also between European countries and Japan. 2020 Update of the European Strategy for Particle Physics confirmed the need for a Higgs factory as the essential next step for particle physics and also expressed willingness of the European community to collaborate in the ILC. ICFA has taken a major step to focus on requirements to establish an ILC „Pre-Lab” in Japan by setting up the International Development Team (IDT). This team has the mandate to pave the way for an organisation that would be the precursor to an official ILC laboratory. News on the ILC project development and IDT activities have been just presented at the 2021 International Workshop on Future Linear Colliders (LCWS2021). The workshop covers physics, detectors, and accelerator issues related to the high-energy linear electron-positron colliders CLIC and ILC. Many activities of the Warsaw LC group have also been presented.

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 12 marca (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Ultra-peripheral vector meson photoproduction in heavy-ion collisions in CMS”

Referuje: Marek Walczak (IFD)

In this seminar I will present the first measurement of the total cross-section of the coherent ultra-peripheral photoproduction of the Υ meson in lead-lead collisions at 5.02 TeV. The data used in the analysis has been collected in 2018 by the CMS experiment at the CERN’s Large Hadron Collider. The considered channel is the muon decay of the Υ meson, Υ → μ+μ−. This process is sensitive to the nuclear Parton Distribution Functions for gluons.

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

 

Dnia 5 marca (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Future Circular Collider – The future of opportunities”

Referuje: dr hab. Marcin Chrząszcz (IFJ PAN)

The FCC-ee is a high-luminosity, high-precision e+e- circular collider. Two separate e+ and e- storage rings with very strong focusing, fed by a full size continuous injector, provide e+e- collision luminosities ranging from (per interaction point) 230 1034 /cm2 /s at the Z pole, 8 1034 /cm2 /s at the ZH production maximum (240 GeV) and 1.7 1034 /cm2 /s at the tt threshold and up to 365 GeV. Two to four interaction points are considered.

The run plan of 15-20 years yields 5 10^12 Z bosons, 10^8 W pairs, 1.3 10^6 Higgs bosons and 10^6 top quark pairs. Thanks to the availability of transverse polarization, the energy calibration at 100 keV precision offers unprecedented precision for measurements of Z and W properties. The possibility of s-channel Higgs production at ECM=125 GeV is under study, giving unique access to the electron Yukawa coupling. These opportunities make the FCC-ee stand out among the other Higgs factory proposals.

Especially at the Z run, considerable challenges await experimenters and theorists, for systematic uncertainties to match the extraordinary available statistical precision.

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 29 stycznia (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Towards spin physics from Lattice QCD”

Referuje: Prof. UAM dr hab. Krzysztof Cichy (UAM)

In this talk, we will present recent directions in lattice QCD computations of nucleon structure, in particular for spin-dependent observables. We will provide a brief non-technical introduction to lattice QCD in general and to lattice methods that give access to the relevant physical quantities. Then, we will review selected results for spin-dependent parton distribution functions (PDFs) and generalized parton distributions (GPDs), including both their moments and their x-dependence. Finally, we will show the nucleon spin decomposition from the lattice in terms of contributions from valence/sea quarks and gluons.

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

 

Dnia 22 stycznia (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Towards identifying the sources of Ultra-High Energy Cosmic Rays”

Referuje: Dr Lech Wiktor Piotrowski (IFD UW)

Even though the first UHECR was detected almost 60 years ago, the origin of these particles remains a mystery. For lower energies, their paths are twisted by the Galactic magnetic field, while for higher energies their fluxes are too low to give a statistically significant location on the sky. This is even though the largest observatories occupy hundreds to thousands of square kilometres.

In this seminar, I will show two approaches to solving this problem. The first one is significantly increasing the volume of the atmosphere observed. This can be achieved either with covering tens of thousands of square kilometres with simple radio antennas, which is the aim of the Giant Radio Array for Neutrino Detection (GRAND) experiment. Alternatively, UHECR induced fluorescent tracks in the atmosphere can be observed from the orbit, which is the idea behind JEM-EUSO and Poemma experiments. The second approach is to detect ultra-high energy neutrinos, unaffected by Galactic magnetic fields, created by the UHECRs close to their origin. This is, again, the aim of both GRAND and Poemma experiments.

 

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

 

Dnia 18 grudnia (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Proton’s interior: a landscape with EIC in foreground”

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

The talk is a pedagogical introduction to main aspects of the contemporary view of the proton structure, viewed from a perspective of the Electron-Ion Collider, a frontier accelerator facility, planned in the US.

 

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 11 grudnia (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

The Baikal-GVD neutrino telescope.

Referuje:  dr hab. Paweł Malecki  (IFJ PAN)

Abstract:

High-energy neutrino astronomy is a fascinating new field of research, rapidly developing1over the recent years. It opens a new observation window on the most violent processes in the universe, fitting very well to the concept of multi-messenger astronomy. Constraining  astrophysical neutrino fluxes can also help to understand the long-standing mystery of the origin of the ultra-high energy cosmic rays.  Astronomical studies of high-energy neutrinos are carried out by large-scale next-generation neutrino telescopes located in different regions of the world, forming a global network of complementary detectors. The Baikal-GVD, being currently the largest neutrino telescope in the Northern Hemisphere and still growing up, is an important constituent of this network.

This talk briefly reviews working principles, analysis methods and some selected results of the Baikal-GVD neutrino telescope.

 

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

 

Dnia 4 grudnia (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

KM3NeT/ORCA: status & perspectives for \nu oscillation and mass ordering measurements

Referuje:  Piotr Kalaczyński (NCBJ)

Abstract:

A next-generation neutrino telescope, the Kilometer Cube Neutrino Telescope (KM3NeT), is currently under deployment in the Mediterranean Sea. Its low energy configuration ORCA (Oscillations Research with Cosmics in the Abyss) is optimised for the detection of atmospheric neutrinos with energies above ∼1 GeV. The main research target of the ORCA detector is the measurement of the neutrino mass ordering and atmospheric neutrino oscillation parameters, while the detector is also sensitive to a wide variety of other physics topics, such as dark matter, non-standard interactions and sterile neutrinos. The presentation will provide an overview of the ORCA detector and introduce its research programme, alongside early analyses of data collected with the array in its current configuration.

 

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW

SEMINARIUM FIZYKI WIELKICH ENERGII

 

Dnia 27 listopada (piątek) o godzinie 10:15, odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

Selected measurements with H→ττ decays using the CMS detector

Referuje:  dr hab. Michał Bluj (NCBJ)

Abstract:

Measurements with the H→ττ decay channel play an important role in probing Higgs boson properties. In this talk recent results obtained by the CMS experiment with the H→ττ channel will be discussed: a measurement of the Higgs boson production cross-section and a measurement of the CP structure of the Yukawa coupling between the Higgs boson and tau leptons.

Serdecznie zapraszamy

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

The meeting will take place on zoom.us platform.

Join Zoom Meeting

https://us02web.zoom.us/j/84516096743?pwd=a3BYQ24zY1ZjQTF4eFIwUnM2WlNaZz09

Meeting ID: 845 1609 6743

Passcode: HEP_UW