Month: Październik 2021

SEMINARIUM FIZYKI WIELKICH ENERGII

 

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

seminarium, na którym zostanie wygłoszony referat pt.:

„Sensitivity of future linear colliders to processes of dark matter production with light mediator exchange.”

Referuje: Prof. dr hab. Aleksander Filip Zarnecki 

Abstract:
As any e+e- scattering process can be accompanied by a hard photon emission from the initial state radiation, the analysis of the energy spectrum and angular distributions of those photons can be used to search for hard processes with an invisible final state. Thus high energy e+e- colliders offer a unique possibility for the most general search of dark matter (DM) based on the mono-photon signature. Production of DM particles at the International Linear Collider (ILC) and Compact Linear Collider (CLIC) experiments was studied for scenarios with a light mediator exchange. Limits on the production cross section and mediator couplings were set in a simplified DM model as a function of the mediator mass and width based on the expected two-dimensional distributions of the reconstructed mono-photon events. Systematic uncertainties were studied in details as well as the impact of the beam polarisation.

 

Serdecznie zapraszamy

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

Seminarium Fizyki Wielkich Energii (29 October 2021) · Indico (cern.ch)

SEMINARIUM FIZYKI WIELKICH ENERGII

 

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

seminarium, na którym zostanie wygłoszony referat pt.:

„Reconstructing  Air Shower properties with Radio Arrays”

Referuje: dr Pragati Mitra (IFD)

Cosmic rays have been an intriguing field of research since their discovery more than 100 years ago. The origin of these highest energetic particles still remain a mystery. When high-energy cosmic rays impinge upon the atmosphere, they create extensive air showers, which are cascades of secondary particles that are observed with various methods. Measuring the radio emission of air showers is a relatively new but increasingly popular method to extract information about the mass composition of cosmic rays. In this talk I will introduce the principles of radio detection technique focusing on the results obtained with The Low-Frequency Array (LOFAR) radio telescope. I will describe the method of reconstructing the shower maximum Xmax- an important estimator of cosmic ray mass, and ways to enhance the accuray of Xmax estimation by including local atmospheric effects. We will also explore the prospects of other cosmic ray mass estimators in addition to Xmax. I will also explain the prospects of a semi-analytic air shower simulation code for radio emission that is few orders of magnitude faster than the conventional monte carlo counterparts. In the end, I will briefly mention our current research plans with GP300- a prototype for The Giant Radio Array for Neutrino Detection (GRAND).

 

Serdecznie zapraszamy

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

 

 

Seminarium Fizyki Wielkich Energii (22 October 2021) · Indico (cern.ch)

 

 

SEMINARIUM FIZYKI WIELKICH ENERGII

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

„How to determine precisely luminosity at pp machine (LHC)?”

Referuje: prof. dr hab. Krzysztof Doroba (IFD)

Abstract: in the talk presented will be methods used by the CMS to measure with 1.2 % accuracy luminosity delivered by LHC. The aim of the talk will be to stress an effort required to obtain such precision. In addition mentioned  will be results on cross sections obtained by the TOTEM experiment in „luminosity indpendent way”, These results in particular concern discovery of the ODDERON, proposed in 1973 by L. Lukaszuk (and B.Nicolescu)

 

Serdecznie zapraszamy

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

Seminarium Fizyki Wielkich Energii (15 October 2021) · Indico (cern.ch)

SEMINARIUM FIZYKI WIELKICH ENERGII

 

Dnia 8 października (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Highlights from the Run-2 LHC results”

Referuje: dr hab. Artur Kalinowski, prof. UW (IFD)

I will present a very subjective selection of analyses using (mostly) full Run-2 data:

W boson mass measurement, a short review of the status of the Higgs boson measurements, four top quark production, vector boson scattering and a measurement on LFV from LHCb.

 

Serdecznie zapraszamy

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

Seminarium Fizyki Wielkich Energii (8 October 2021) · Indico (cern.ch)