Dr. Ömer Penek
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Dr. Ömer Penek
Scientific Profiles:
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Education
- 2021 PhD in Physics
Physics Institute III, RWTH Aachen University
Focus of research:Neutrino Physics and Beta Decay Spectroscopy
Thesis title: Measurement of pp and CNO Cycle Solar Neutrinos with Borexino - 2016 M.Sc. in Physics
Physics Institute III, RWTH Aachen University
Focus of Research: Nuclear Physics, Elementary Particle Physics, Astroparticle Physics, Cosmology, and Quantum Field Theory
Master Thesis: Calculation of the Cherenkov Light Yield for High-Energy Particle Cascades - 2013 B.Sc. in Physics
Institute for Theory of Statistical Physics
Focus of Research: Quantum Mechanics
Bachelor Thesis: Numerical Solution of the Quantum-Vlasov-Equation in the Wigner-Representation
NEW: Institute Management Committee Member as Young Scientist Representative in the Nuclear Physics Institute
- Topic: Representing Young Scientists in Academic Issues linked to the Institute Development
- Decision making
NEW: Chair of the last plenary session at the 40th International Symposium on Physics in Collision 2021 (Aachen, Germany)
- Topic: Gravitational Waves and Cosmology
- Officially invited by the Head / Director of the Physics Institute IIIb at RWTH Aachen University
NEW: Official Member of the Borexino Talk Review Committee
- Officially declared as Talk Review Committee member by the Borexino Institutional Board (one of four members)
- Main Task: Review of Borexino Presentations which are going to be shown at e.g. conferences, workshops, etc.
Astroparticle Research: Solar Neutrino Physics
- Analysis of solar neutrino data with Borexino
- Sensitivity and Toy Monte Carlo studies towards measuring neutrinos from the CNO fusion cycle in the Sun
- Significant contributions to the comprehensive measurement of pp chain and CNO cycle solar neutrinos
- Significant contribution to non-standard neutrino interaction studies (radiative corrected neutrino-electron scattering) and recoiled electron spectra calculation
Nuclear Physics: Beta Spectroscopy
- Nuclear Beta Decay Theory
- Detector Response Modelling (plastic and liquid scintillators)
- Geant4 based Monte Carlo Simulations of Decays and Interactions
- Analysis of decay electrons from a {144}^Ce-{144}^Pr beta source to measure the shape factor of {144}^Pr
Coding: Development of a vectorized fast fitting environment for Borexino/JUNO Solar Neutrino Analysis
- Spectral Analysis based on Monte Carlo Probability Density Functions
- Fitting of Real and Pseudo Data
- Pseudo Dataset Generation and Fitting in RunTime (without additional need of storage)
- Additional implementations easily possible
- Code Parallelization Possible (OpenAcc, OpenMP)
- Development of a full non-equidistant binned 2D fitting approach
High Performance Computing Issues
- Second principle investigator and person-to-contact for Solar Neutrino Analysis with Borexino Computing Projects (04/2017 - 01/2022)
- Project and report writing
- Setting up CPU / GPU parallel coding infractures on supercomputers (JURECA at Forschungszentrum Juelich, Germany)
- Setting up coding environments on international servers (JURECA in Germany, CNAF in Italy)
Student Supervision in Neutrino and Detector Physics Analyses
- Bachelor and Master students (~4)
- PhD students (~3)
Further topics
- Statistical testing of composite hypotheses
- Likelihood based fitting (Analytical, Monte Carlo approaches)
- Likelihood Construction Techniques
- Calculation of recoiled electron spectra from neutrino-electron interactions
- Solar Neutrino Flux Calculations
- Bayesian
Selected Scientific Publications
- M. Agostini et al. (Borexino Collaboration), First Directional Measurement of Sub-MeV Solar Neutrinos with Borexino, Phys. Rev. Lett. 128, 091803 (2022)
- M. Agostini et al. (Borexino Collaboration), Correlated and integrated directionality for sub-MeV solar neutrinos in Borexino, Phys. Rev. D 105, 052002 (2022)
- O. Penek, Measurement of pp and CNO cycle solar neutrinos with Borexino (PhD Thesis), RWTH Aachen University 2021
- S. Kumaran, L. Ludhova, O. Penek, and G. Settanta, Borexino Results on Neutrinos from the Sun and Earth, Universe 2021, 7(7), 231
- M. Agostini et al., Experimental evidence of neutrinos produced in the CNO fusion cycle in the Sun, Nature 587 (2020) p. 577–582.
- M. Agostini et al., Sensitivity to neutrinos from the solar CNO cycle in Borexino, Eur. Phys. Jour. C 80 (2020) 1091.
- M. Agostini et al., "Constraints on Flavor-Diagonal Non-Standard Neutrino Interactions from Borexino Phase-II", JHEP 2 (2020) 038.
- M. Agostini et al., "First Simultaneous Precision Spectroscopy of pp, 7Be, and pep Solar Neutrinos with Borexino Phase-II", Phys. Rev. D 100 (2019) p. 082 004
- M. Agostini et al., Comprehensive measurement of pp-chain solar neutrinos, Nature, 562 (2018) 505-510.
- M. G. Aartsen et al., Search for sterile neutrino mixing using three years of IceCube DeepCore data, Phys. Rev. D, 95 (2017) 112002.
- M. G. Aartsen et al., Determining neutrino oscillation parameters from atmospheric muon neutrino disappearance with three years of IceCube DeepCore data, Phys. Rev. D, 91 (2015) 072004.
- M. G. Aartsen et al., Multimessenger Search for Sources of Gravitational Waves and High-Energy Neutrinos: Results for Initial LIGO-Virgo and IceCube, Phys. Rev. D, 90 (2014) 102002.
- M. G. Aartsen et al., Observation of High-Energy Astrophysical Neutrinos in Three Years of IceCube Data, Phys. Rev. Lett., 113 (2014) 101101.
(Active) Teaching Experience (Tutorship)
- Experimental Physics I for Bachelor Students, RWTH Aachen University (2014)
Mechanics and Relativity - Elementary Particle Physics II for Master Students, RWTH Aachen University (2017)
Neutrino Physics - Elementary Particle Physics II for Master Students, RWTH Aachen University (2018)
Neutrino Physics
Selected Conference Contributions
- Blois 2022: 33rd Rencontres de Blois on Exploring the Dark Universe, Blois, France, 2022
Observation our Sun with Borexino - 17th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2021), Valencia, Spain, 2021
Observation of CNO cycle solar neutrinos in Borexino - DPG Spring Meetings, Dortmund, Germany, 2021
Measurement of pp chain and CNO cycle solar neutrinos with Borexino - XIX International Workshop on Neutrino Telescopes, Padova/Venice, Italy (Online), 2021
Sensitivity to CNO cycle solar neutrinos in Borexino - WIN2019. The 27th International Workshop on Weak Interactions and Neutrinos., Bari, Italy, 2019
Measurement of pp-chain solar neutrinos with Borexino - DPG Spring Meetings, Aachen, Germany, 2019
Analytical Multivariate Studies in the Borexino Solar Neutrino Analysis - DPG Spring Meetings, Wuerzburg, Germany, 2018
Analytical Multivariate Fit in the Borexino Solar Neutrino Analysis - DPG Spring Meetings, Hamburg, Germany, 2016
Calculation of the Cherenkov Light Yield of High-Energetic Particle Cascades in IceCube - DPG Spring Meetings, Mainz, Germany, 2014
Calculation of the Cherenkov Light Yield of Ultra-High-Energetic Particle Cascades in Ice - The 40th International Symposium on Physics in Collision 2021, Aachen, Germany, 2021
First Experimental Evidence of CNO Cycle Solar Neutrinos by Borexino - Neutrino Conference, Fermilab, Illinois, USA, 2020
Borexino Sensitivity Studies towards Detection of Solar Neutrinos from the CNO Fusion Cycle - Phystat-Nu Workshop, CERN, Geneva, Switzerland, 2019
Analytical Multivariate Fit and Sensitivity Studies in the Borexino Solar Neutrino Analysis - Borexino 10th Anniversary, L'Aquila, Italy, 2017
Analytical Multivariate Fit with GooStats in the Borexino Solar Neutrino Analysis - 15th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2017), Sudbury, Canada, 2017
Speeding up Multivariate Analysis with Parallel Computing
Selected Talks
Selected Posters
Selected Colloquia
- Imperial College London, England, 2021
Search for Non-Standard Neutrino Interactions in Borexino Phase-II - Institute for Nuclear Physics, FZ Juelich, Germany, 2020
First experimental evidence of Neutrinos produced in the CNO fusion cycle in the Sun - University of Strasbourg, France, 2019
Measurement of pp-chain solar neutrinos with Borexino and Towards Measuring CNO neutrinos