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Winter Term 2025/2026
Keywords All Master/Specialization Astronomy and Astrophysics Atomic, Molecular and Optical Physics Biophysics, Medical Physics Particle Physics
Type All Seminar (2)
- Astroparticle Physics (MVSem)
Seminar Mertens S
heiCO-Info more information1300262203
Zu dieser LV existiert kein AnmeldeverfahrenContent
Astronomical and cosmological observations require the existence of dark matter in our universe. Today, Dark Matter is generally thought to have particle nature, where the dark matter particles have relatively long lifetimes, interact gravitationally and, possibly, also via the weak interaction. In the Standard Model of particle physics, only neutrinos have the correct properties, but, due to their small mass, neutrinos can only account for a small fraction of the observed Dark Matter in our universe. In extended versions of the standard model sterile neutrinos, in particular keV-sterile neutrinos can contribute as warm dark matter candidates. Light supersymmetric particles are an example for weakly interacting massive particles (WIMPs) which are candidates for cold darm matter. Other viable dark matter candidates are axions, which have been introduced to solve the strong CP-problem of QCD, or axion-like particles. The seminar will address the astrophysical and cosmological evidences which led to the postulation of dark matter. It will discuss the most prominent dark matter candidates and the different direct and indirect methods to search for their existence. Particular emphasis is put on the determination of neutrino masses, the search for sterile neutrinos, WIMPS and axions.
- Precision Measurements in Particle Physics (MVSem)
Seminar Bachmann S, Schmidt U
Homepage heiCO-Info more information1300262227
Zu dieser LV existiert kein AnmeldeverfahrenCourse Information
Time & Location:
Thursday 14:00-16:00h, room: conference room at PI (INF 226 - gold box, room 01.106)
We will meet on October 9th for the first time.
If you are interested in an early seminar talk please contact us in advance
Lecturer:
Sebastian Bachmann (SB: bachmann@physi.uni-heidelberg.de)
Ulrich Schmidt (US: uschmidt@physi.uni-heidelberg.de)
The topic of the seminar are precision measurements in particle physics. Find below a list of possible topics. If you are interested in one of them and like to give your presentation at an early date in the semester, you can contact us at any time during the semester break. Topics are distributed on first come first serve basis. Other topics are wellcome. Feel free to send us proposals (should not be related to you bachelor thesis or early seminiar talk you gave).
Proposal for Topics
- Measurement of neutrino oscillation
- Measurement of the anomalous magnetic moment of the muon (g-2)μ
- Measurement of neutrino coherent scattering
- Neutrino mass measurement at the KATRIN experiment
- Measurement of the Weinberg angle sin thetaw
- Measurement of Bs oscillation at LHCb
- The neutron lifetime puzzle
- Test of graviation at small scales (torsion pendulum)
- Measurement of electron EDM
- Measurement of neutron EDM
- Measurement of the EDM of a diamagnetic nucleus (Hg-199, Xe 129)
- Search for neutrinoless double beta decay (0ν2β)
- Measurement of the Z mass and width at LEP
- Measurement of the free neutron Beta-decay
- Search for dark matter with the AMS-experiment
- Measurement of the Fermi constant
- NA62: Search for new physics in the decay K+ -> π+νν
Prerequisits and Conditions
- You have followed the Particle Physics lecture
- For the preparation of your talk, search of suitable material (papers etc.). In case you have questions please contact your superviser.
- Latest 3 weeks before your talk you arrange for a meeting with your supervisor to discuss the material, at this time you should have already a draft outline of your presentation available.
- Latest 1 week before your talk you have the slides completed and you have a rehearsal with your supervisor.
- Your talk is 45-60 minutes. It explains the main physics ideas but as well selected experimental/technical highlights which enabled this precision measurement.
- Latest 2 weeks after your presentation you hand in a 6-10 page summary about your presentation.
- Attendance of all seminars is mandatory. If you exceptionally cannot come, please let us know beforehand.
- The grade will evaluate, your understanding of your topic, the quality of your presentation and didactical quality of it, the quality of your written report and your general active participation in the seminar.
Content
The topic of the seminar are precision measurements in particle physics. For details please visit our web-site: https://uebungen.physik.uni-heidelberg.de/vorlesung/20241/1834
