Seminarium "Teoria cząstek elementarnych i kosmologia"
2017/2018 | 2018/2019 | 2019/2020 | 2020/2021 | 2021/2022 | 2022/2023 | 2023/2024 | 2024/2025
2024-10-24 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 12:15 
Kazuki Sakurai (IFT UW)Testing Quantum Mechanics at Colliders
Recently, there has been a lot of attention and studies on treating high-energy colliders as natural quantum processors. Along these lines, we propose a novel test of quantum mechanics which goes beyond the Bell-inequality test. Our proposal is based on the Quantum Process Tomography, i.e. an experimental reconstruction of the entire quantum channel. We demonstrate such a test can be implemented with the e+ e- > t tbar process at lepton colliders with multiple runs of different beam polarisation settings. We also discuss the possibilities of Quantum Process Tomography with different collider processes.
2024-10-17 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 12:15
Indra Kumar Banerjee (Indian Institute of Science Education and Research, Brahmapur)Spinning Primordial Black Holes from First Order Phase Transitions
In this talk I explain a novel study we conduct to obtain the initial spin of the primordial black holes created during a first-order phase transition due to delayed false vacuum decay. Remaining within the parameter space consistent with observational bounds, we express the abundance and the initial spin of the primordial black holes as functions of the phase transition parameters. The abundance of the primordial black holes is extremely sensitive to the phase transition parameters. We also find that the initial spin weakly depends on all parameters except the transition temperature.
2024-10-10 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 12:15
Cancelled
2024-10-03 (Czwartek)
Zapraszamy do sali 1.01, ul. Pasteura 5 o godzinie 12:15
Krzysztof Jodłowski (IBS Daejeon, South Korea)Can electric dipole moment experiments distinguish sources of BSM CP violation?
In the SM, CP violation (CPV) is insufficient for baryogenesis and near-term future measurements of electric dipole moments (EDMs). We examine whether chromo-electric dipole moments (CEDMs) of gluons and light quarks can be distinguished from the QCD θ-term using EDMs of nucleons and diamagnetic nuclei. We analyze scenarios with and without the Peccei-Quinn (PQ) mechanism explaining the strong CP problem. Without PQ, nucleon EDMs show distinctive patterns when induced by light quark CEDMs. With PQ, nucleon EDMs are similar regardless of the source, but some diamagnetic nuclei EDMs may reveal characteristic patterns depending on the dominant source. On the other hand, distinguishing gluon CEDM from θ-term requires additional knowledge of low energy hadronic parameters, which limit the analysis at present. Our results suggest that EDMs may reveal unambiguous sign of BSM CPV possibly also identifying the origin of the axion vacuum expectation value.
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