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
2017-06-09 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15 
prof. Maxim Polyakov (RUB, Niemcy)On a possibility of charmed exotica
The seminar takes place in room B2.38 We employ the chiral quark-soliton model to describe excited baryons with one heavy quark. Identifying known charmed baryons with multiplets allowed by the model, we argue that apart from regular excitations of the ground state multiplets, some of recently reported by the LHCb collaboration narrow Ί0cstates, may correspond to the exotic pentaquarks. This interpretation can be easily verified experimentally, since exotic Ί0cstates - contrary to the regular excitations – form isospin triplets, rather than singlets.
Seminarium odbędzie się w sali B2.38
2017-05-26 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Krzysztof Doroba (IFD UW)Low energy muon experiments (as seen by non-specialist)
This seminar will exceptionally take place in room B2.38experiments with low energy muons might deliver important information concerning Standard Model and possible New Physics beyond. Small but aiming at very high precision these experiments have to face stringent requirements concerning rate, timing and space resolution. Based on literature review of some PSI experiments will be presented with particular emphasis on future Mu3e experiment which is aiming at BR(mu –>3e) limit as low as 10 ^-16
Seminarium odbędzie się wyjątkowo w sali B2.38
2017-05-19 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Michal Bluj (NCBJ)Particle-Flow reconstruction and global event description with the CMS detector at LHC
Particle-Flow reconstruction aims to reconstruct and identify each final state particle produced in each collision. Such list of particles provides a global event description. This allows to improve performance of jets, missing transverse momentum, hadronic tau reconstruction, electron and muon identification compared to a traditional sub-detector based approach.In this seminar, I will present basics of the Particle-Flow approach, requirements for detector design posed by the this approach, issues solved in a way to make it works at hadron collider environment, and finally achieved performance.
2017-04-28 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Tomasz Golan (UWr)NuWro - neutrino Monte Carlo event generator
NuWro is a Monte Carlo neutrino event generator, which has been developed for years at Wroclaw University. It simulates neutrino interactions with nucleons and nuclei (including realistic detector geometry). The variety of implemented models makes it possible to study processes in a wide neutrino energy range. It is used for both data analysis and the validation of theoretical models.During the seminar I will introduce the NuWro generator and highlight implemented models of neutrino interactions and final state propagations through nuclear matter. I will also present the first analysis of neutral current elastic scattering data with the inclusion of two-body current interactions.
2017-04-21 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr hab. Piotr Zalewski, prof. NCBJ (NCBJ)Search for a dark matter at the LHC
A dark matter is probably the only challenge that has clear experimental (cosmological and astrophysical) motivation, and which the LHC, perhaps, can face.Almost every search at the LHC is somehow related to some dark matter candidate particle.I will share impressions related to the status of dark matter searches at the LHC in the middle of the LHC run 2 as it was presented at major Spring conferences related to the subject.
2017-04-07 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Grzegorz Wrochna (NCBJ)Polska energetyka jadrowa - Wanka-Wstanka czy kot Schroedingera?
Medialne doniesienia o stanie programu polskiej energetyki jadrowej (PPEJ) daja bardzo chaotyczny i niespojny obraz. Seminarium bedzie proba odpowiedzi na pytania:- Jaki jest formalny i faktyczny stan PPEJ, co juz dokonano, jakie prace trwają i jakie są dalsze perspektywy?- Czy i jakie miejsce w PPEJ mają wielkie reaktory lekkowodne (LWR), małe reaktory modułowe (SMR) i reaktory wysokotemperaturowe (HTR)?- Jakie jest miejsce PPEJ na tle rozwoju energetyki jądrowej w Europie i na świecie?
2017-03-31 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr hab. Marcin Konecki (IFD UW)The Level-1 muon trigger of the CMS experiment (focus on Warsaw Group activities)
The CMS triggering strategy and muon detectors are presented.The old Level-1 system with muon sub-triggers related to muon detectors, is discussed. It terminated its operation in 2015.The current Level-1 trigger system (Muon Track Finder) consists of barrel, endcap and overlap partitions. The trigger algorithms are explained and performance is shown.The overview of CMS Level-1 upgrade plans for LHC Phase-II is given.The works of Warsaw Group are emphasised.
2017-03-24 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Aleksander Filip Żarnecki (IFD UW)CLIC project: accelerator, detector and physics program
W ramach seminarium postaram się podsumować, w oparciu o prezentacje zostatniego spotkania roboczego współpracy CLIC w CERN, obecny statusprojektu.
I will try to summarise the current status of the CLIC project, based on thereports presented at the recent CLIC Workshop 2017 at CERN.
2017-03-17 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Beata Brzozowska (IFD UW)Spatiotemporal dynamics of DNA damage and repair in cells exposed to ionizing radiation
A particular problem of modern external beam radiotherapy like IMRT and proton therapy is associated with simultaneous exposure of patients to the therapeutic beam and scattered neutrons with a high relative biological effectiveness (RBE). The interesting question is whether the high and low LET radiations act in a synergistic or additive manner. If they act additively, then the risk of radiotherapy-induced cancer can be deduced from the results of exposures to the single agents. Otherwise, RBE values must be generated for the mixed exposure scenarios or corrected to account for the synergism.The goal of this study is to analyse the kinetics of formation and repair of ionising radiation-induced DNA repair foci in cells exposed to a particles, X-rays and a mixed beam of both. We focus on studying if exposure to mixed beams leads to the formation of clustered damage which poses serious problems for the DNA repair machinery. Increased damage complexity following exposure to mixed beams will suggest a higher than expected risk of cancer induction by modern radiotherapy.Human U2OS cells were transfected with plasmids coding for the DNA repair proteins 53BP1 that are tagged with the green fluorescence protein. Cells were exposed to mixed beams in a dedicated exposure facility installed at the Stockholm University. The facility is composed of an YXLON 200 X-rays source and a 50 MBq Am-241 alpha source kept inside a 37oC cell incubator. Spatiotemporal dynamics of 53BP1 foci formation and repair was recorded by time-lapse photography and image analysis.
2017-03-03 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Barbara Badełek (IFD UW)Projekty nowych zderzaczy elektron – proton
W najblizszej i nieco dalszej przyszlosci srodowisko fizykow wysokich energii planuje uruchomienie zderzacza elektron-proton, ktory umozliwilby uprawianie fizyki rozpraszania gleboko nieelastycznego (DIS) przy energiach (znacznie) wyzszych niz dotychczas. Rozwaza sie kilka projektow, opartych o rozne technologie i usytuowanych w roznych miejscach swiata. W referacie dokonam przegladu goracych problemow DIS, opisze trzy z planowanych urzadzen, EIC, LHeC i VHEeP, oraz ich mozliwosci i programy badan.
2017-01-27 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Krzysztof Pachucki (IFT UW)The proton charge radius conundrum
The 2010 measurement of the muonic hydrogen Lamb shift by Pohl and collaborators has questioned our understanding of hydrogenic systems.A significant disagreement with theoretical predictions, which can be interpreted as a discrepancy in the proton charge radius between electronic and muonic measurements has not been resolved till now. A single muonic measurement stands against dozens of electronic hydrogen and electron- proton scattering ones and no simple extension of the Standard Model can fix this. We will argue that the only solution which does not violate the lepton universality is the underestimated uncertainty of all the electronic measurements and it is the muonic hydrogen value which is the correct one. As a consequence this hypothesis will cause a significant changes in fundamental physical constants and I will present all possible means of verifying the new proton charge radius value.
2017-01-20 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Pawel Bielewicz (CAMK)Planck 2015 cosmological results
Studies of the cosmic microwave background (CMB) are today one of the most important pillars of observational cosmology. They provide information on the initial conditions of the Universe and scales comparable to the horizon of the observable Universe. This gives a unique opportunity to test the standard cosmological model at very early epoch of the Universe evolution. Since the COBE and WMAP data releases, considerable effort has been spent on analyzing properties of the CMB anisotropy maps. Recently released, the state-of-the art observations, performed by the Planck satellite, have allowed to significantly improve constraints on the standard cosmological model. I will present the Planck experiment and cosmological results published in 2015 and 2016.
2017-01-13 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Krzysztof Golec - Biernat (IFJ PAN)Dipole approach to DIS scattering processes
Zostaną zaprezentowane szczegóły opisu dipolowego do rozpraszania głębokonieelastycznego dla mały wartości zmiennej Bjorkena.Bazując na wynikach z akceleratora HERA przedyskutowane zostaną zarówno aspekty eksperymentalnej jaki teoretyczne tego opisu.Przedstawione będą także możliwe zastosowania opisu dipolowego do procesów w zderzeniach protonów oraz ciężkich jonów.
Details of the dipole approach to deep inelastic scattering processes at small values of the Bjorken variable will be presented Both experimental and theoretical aspects will be discussed on the example of the results from HERA. Possible applications in pp and heavy ion collisions will also be discussed.
2016-12-16 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Damian Pszczel (NCBJ)Search for a dark photon in WASA-at-COSY experiment
One of the main problem of the modern cosmology is how to explain the apparent missing energy-mass content of the Universe. The existence of dark matter particles is one of the most widely investigated possibilities to solve this issue.Among the plethora of different theoretical models that describe the coupling between normal and dark matter some of them introduce the mixing of a light dark vector boson, also called dark photon, with the SM photon.In those models, the dark photon has a non-zero mass and decays, for example, into e+e- pair.The WASA-at-COSY experiment is designed to study light meson decays such as π→e+e-γ, η→ e+e-γ (Dalitz decays) or η→e+e- with an electron-positron pair in the final state. The observation of a narrow structure in the invariant mass of e+e- spectra could be explained as the signature of the dark photon decay.We present the description of the analysis of the η→ e+e-γ channel based on 2012 data collected in WASA-at-COSY.We will also briefly review the analysis of other channels that contribute to the dark photon search in WASA-at-COSY and other experiments.
2016-12-09 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
Wojciech Krzemień (NCBJ)Search for CPT symmetry violation in neutral flavour meson oscillations
CPT is the simultaneous combination of three transformations: charge conjugate C, parity P and time reversal T. The discrete CPT symmetry is believed to be strictly conserved in the nature. This statement is strengthened by the general theorem formed in 50' by Pauli, Luders, Schwinger and Jost. The theorem states that any local, Lorentz-invariant quantum field theory must be also CPT-invariant.The precise experimental tests of indirect CPT symmetry violation can be performed by exploiting the neutral-meson oscillation phenomena, one of the fascinating effects predicted by Quantum Mechanics, in which the meson oscillates back and forth between its particle and antiparticle states.The overview of the last LHCb experimental results and prospects will be given
2016-12-02 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Tadeusz Lesiak (IFJ PAN)What's up in ECFA?
The seminar will review selected activities of the European Committee for Future Accelerators (ECFA). The outcome of recent survey concerning the status of high energy physics in Poland will be also presented.
2016-11-04 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr hab. Artur Kalinowski (IFD UW)CMS results on resonance searches with the LHC Run II data
W czasie seminarium mówię wyniki poszukiwań nowych rezonansów przeprowadzenie przez zespół badawczy CMS, oparte o dane zebrane w latach 2015 - 2016 w czasie drugiego etapu pracy zderzacza LHC (tzw. Run II).
During the seminar I will present results on searches for new resonances, obtained by CMS Collaboration and based on data collected during the LHC Run II.
2016-10-28 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Dmytro Melnychuk (NCBJ)Exotic hadronic states at LHCb
The analysis of the full LHC Run I data set of proton-proton collision events collected with the LHCb detector is yielding several improved results on exotic hadron candidates, such as X(3872), Z(4430)+, family of J\Psi phi resonances as well as non-observation of Bs pi resonance and the first observation of two states compatible with the pentaquark hypothesis. The measurements of the properties of these exotic states will be presented, including the determination of their quantum numbers, with model dependent and independent methods.
2016-10-14 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
prof. dr hab. Aleksander Filip Żarnecki (IFD UW)Sprawozdanie z konferencji ICHEP'2016
Przedstawie wybrane, moim zdaniem najwazniejsze i najciekawsze wyniki, ktore byly prezentowane na 38 Miedzynarodowej Konferencji Fizyki Wysokich Energii (38th International Conference on High Energy Physics, ICHEP'2016) w Chicago, w sierpniu 2016.
2016-10-07 (Piątek)
Zapraszamy do sali 1.03, ul. Pasteura 5 o godzinie 10:15
dr Pawel Przewlocki (NCBJ)Nowości ze świata oscylacji neutrin – raport z konferencji Neutrino 2016
Odbywająca się co dwa lata konferencja Neutrino jest najważniejszą konferencją w fizyce neutrin. W tym roku jej 27. edycja została zorganizowana w Londynie. Podczas mojego seminarium pokażę najważniejsze ostatnie wyniki zaprezentowane na konferencji i podsumuję ostatnie postępy w doświadczalnych badaniach oscylacji neutrin.