Seminarium Fizyki Wielkich Energii
2006/2007 | 2007/2008 | 2008/2009 | 2009/2010 | 2010/2011 | 2011/2012 | 2012/2013 | 2013/2014 | 2014/2015 | 2015/2016 | 2016/2017 | 2017/2018 | 2018/2019 | 2019/2020 | 2020/2021 | 2021/2022 | 2022/2023 | 2023/2024 | 2024/2025
Poszukiwanie rzadkiego rozpadu t->cH w przyszlych zderzaczach e+e-
Rozpad bozonu Higgsa łamiący zachowanie liczby leptonowej H→μτ w CMS: Narzedzia analizy i wyniki
Dlaczego potrzebujemy bliskich detektorów w eksperymentach neutrinowych?
Why do we need near detectors in long baseline neutrino experiments?
Long baseline neutrino experiments measure the parameters of neutrinooscillations with higher and higher precision and search for new, subtleeffects. The systematic errors is one of the main difficulties in suchexperiments, due to uncertainties of the cross sections and the neutrinobeam. The error can be suppressed thanks to the measurements coming from socalled near detectors, which study the unoscillated beam. I will present thesources of the errors and the methods of using the near detectormeasurements, showing mainly T2K experiment as an example, but also MINOSand K2K.
The Level-1 muon trigger of the CMS experiment
Higgs as a probe of new physics
Polaryzowalność pionu: nowy pomiar współpracy COMPASS w CERN
Pion polarisability: a new measurement by the COMPASS Collaboration at CERN
This is a report on the key measurement on the strong interaction, performedrecently by the COMPASS (COmmon Muon and Proton Apparatus for Structure and Spectroscopy, http://wwwcompass.cern.ch/) Collaboration: the measurementof the pion polarisability, the degree to which its shape can be stretched in the electromagnetic field. The polarisability has baffled scientists since the 1980s, when the first albeit inaccurate measurements appeared to be at odds with the theory. Today’s result is in close agreement with theory.The original paper is available herehttp://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.062002
Przegląd Produkcji (anty-)(hiper-)Jąder Oraz Poszukiwanie Stanów Egzotycznych w Eksperymencie ALICE przy LHC
Review of (anti-)(hyper-)Nuclei Production and Search for Exotic States with ALICE at the LHC
In ultra-relativistic collisions at the Large Hadron Collider (LHC) light (anti-)(hyper-)nuclei are produced with significant yields, especially in collisions of lead nuclei. In addition, these collisions give the opportunity to search for exotic states. Light nuclei are identified using the excellent particle identification capabilities of the Time Projection Chamber (TPC) and of the Time-Of-Flight (TOF) detectors of the ALICE experiment. Transverse-momentum spectra and production yields of light composite objects such as light (anti-)nuclei and the (anti-)(hyper-)triton will be presented. In order to clarify their production mechanism the comparison of the results obtained for the three collision systems, pp, p-Pb and Pb-Pb, at different energies, will be shown. The measurements are then compared with predictions from thermal and coalescence models. Very precise measurement of the light (anti-)nuclei masses will be exploited for testing the CPT invariance. In addition, preliminary results from searches of weakly-decaying light exotic states, such as the Lambda-Lambda (H-dibaryon) and the Lambda-neutron bound states will be presented.
New e+e- accelerators at the energy frontier
Fizyka kwarku t w przyszlych akceleratorach e+e-
Top physics at future e+e- colliders
Precise study of the Higgs boson properties is considered as the main goal of all future e+e- collider projects. However, measurement of top mass, width and couplins is also crucial for validation of the Standard Model. Selected results concerning top measurements at ILC, CLIC and FCCee will be presented.
Nowe wyniki pomiarów łamiącej symetrię CP fazy phi_s
New measurements of the CP-violating phase phi_s
One of the important subjects studied in the LHCb experiment is the difference between properties of matter and antimatter. For the beauty (Bs) mesons the size of this discrepancy is controlled by the phase difference phi_s between decay amplitudes of particles and antiparticles. The value of the phi_s is precisely predicted in the Standard Model. However, effects of new particles not present in the SM can change the value significantly. The talk will present precise measurements of the phi_s phase with Bs -> J/psi K K and B_s -> J/psi pi pi decays.
Plazma kwarkowo-gluonowa widziana przez folię “GEM”, czyli modernizacja komory projekcji czasowej detektora ALICE
Looking at Quark Gluon Plasma through GEM foils – upgrade of the ALICE TPC detector
A Large Ion Collider Experiment (ALICE) is the detector at the CERN LHC dedicated to the study of strongly interacting matter, in particular the properties of the Quark-Gluon Plasma. The ALICE Collaboration plans a major upgrade of the central barrel detectors to cope with an increase of the LHC luminosity in Pb-Pb after 2018. The goal is to record Pb-Pb interactions at a rate of 50 kHz after Long Shutdown 2 (LS2), which is a factor of about 100 more than the current data acquisition rate. This will result in a significant improvement on the sensitivity of rare probes that are considered key observables to characterize the hot and dense QCD matter created in such collisions. For the Time Projection Chamber (TPC) this implies replacement of the existing MWPC-based readout chambers by continuously operated Gas Electron Multiplier (GEM) to overcome the rate limitations imposed by the present gated readout scheme. An extensive R&D program has been launched to reach the challenging goals of the upcoming upgrade of the detector and online calibration and data reduction system.
Fizyka oscylacji neutrin: spojrzenie w przyszłość
Physics of neutrino oscillations: a look forward
During the seminar I will discuss the most important challenges thatneutrino physicists are currently facing. I will also talk about futureexperiments that will try to answer numerous important questions, such aswhat is the neutrino mass hierarchy or whether the CP symmetry is broken inthe neutrino sector.
Sprawozdanie z seminarium ICFA'2014 w Pekinie
ICFA Seminar takes place every three years with the aim of bringing togethergovernment officials, representatives of the major funding agencies, thedirectors of major HEP laboratories, and leading scientists from all of theregions of HEP activity. The last seminar took place October 27-30 inBeijing. The focus of the meeting was on the recent achievements, currentstatus and future perspectives in High Energy Physics.
Elastyczny i calkowity przekroj czynny w LHC
Quark Matter 2014: cztery pożegnania i "skandal" czyli subiektywny przegląd najciekawszych wyników
I will report selected recent results related to Quark Gluon Plasma studies which were presented during Quark Matter 2014 conference.
Co nowego w fizyce neutrin?
The Origin of Carbon, The Hoyle State and Symmetry
Badanie spinu bozonu Higgsa w eksperymencie CMS
I will present results on the spin and parity measurements, based on the final analysis of the LHC Run 1 data by the CMS experiment.
Sprawozdanie z konferencji DIS 2014
Exploring new physics with present and future cosmic microwave background observations
The Planck space mission will soon deliver its final data products and the results of the analysis of its observations of CMB temperature and polarization anisotropies. While a simple 6-parameter cosmological model seems to fit remarkably well the observed CMB angular power spectrum, many open questions still remain, which can be addressed with even more sensitive CMB observations: What is the nature and interaction properties of the dark matter? What is the equation of state of dark energy? What is the role of the neutrinos on the cosmic history?What is the mass and the hierarchy of the three neutrino species? Are there any extra relativistic degrees of freedom beyond those of the standard model? What physics governs the mechanism of cosmic inflation that is supposed to be at the origin of the primordial fluctuations? Are there primordial gravity waves and have they been detected by the BICEP2 experiment?
I will discuss the present status of our understanding of these questions, and the scientific case and possible design of a next-generation CMB satellite, COrE+, to be proposed to ESA as a future medium-scale European space mission.Ku orbitalnym obserwacjom promieniowania kosmicznego najwyższych energii -- eksperymenty EUSO
The way to the orbital observations of the highest energy cosmic rays -- the EUSO experiments
The sources of the highest energy cosmic rays -- above ~1019 eV -- are still one of the greatest mystery of the modern physics. What can accelerate the particles to such high velocities? Is it "new physics'' or some mechanisms that can be explained with the current state of knowledge? To answer these questions one has to identify the sources of the radiation, a task difficult due to the very small flux of the particles reaching Earth -- 0.001-0.01 per year per km2.Existing experiments such as Auger or Telescope Array are, probably, close to the confirmation of the anisotropy of particles' incoming directions and the discovery of "hot spots''. However, the identification of sources requires much larger detection area. It seems that the best solution are orbital observations of the light generated by cosmic ray induced atmospheric cascades. This is the main task of the planned JEM-EUSO experiment. Its general concept, status and the information about other experiments from the EUSO family will be the main topic of this seminar.