Wochenübersicht für die Woche 21 Apr 2025 bis 27 Apr 2025 (KW 17)

22 Apr 2025

Theorie-Palaver

Institut für Physik

14:00 Uhr s.t., Lorentz room (Staudingerweg 7, 5th floor)

Duarte Fontes, KIT
Muon conversion — the process of a bound muon decaying into an energetic electron — is one of the best probes of charged lepton flavor violation. The experimental limit is soon expected to improve by four orders of magnitude, thus calling for precise predictions on the theory side. Equally important are precise predictions for muon decay-in-orbit, the main background for muon conversion. While the calculation of electromagnetic corrections to the two processes above the nuclear scale does not involve significant challenges, it becomes substantially more complex below that scale due to multiple scales, bound-state effects and experimental setup. In this talk, I present a systematic framework that addresses these challenges by resorting to a series of effective field theories. Combining Heavy Quark Effective Theory (HQET), Non-Relativistic QED (NRQED), potential NRQED, Soft-Collinear Effective Theory I and II, and boosted HQET, I derive a factorization theorem and present the renormalization group equations.

23 Apr 2025

PRISMA+ Colloquium

Institut für Physik

13:00 Uhr s.t., Lorentz-Raum, 05-127, Staudingerweg 7

Prof. Dr. Xianguo Lu, University of Warwick, England, UK
Neutrinos, though nearly massless and weakly interacting, play a central role in modern physics—from the origin of mass and the nature of matter–antimatter asymmetry to the search for physics beyond the Standard Model. Yet one of the main obstacles to fully realising their potential lies in our limited understanding of how neutrinos interact with matter. These interactions are complex, often involving nuclear effects that are difficult to model and challenging to measure. As a result, they introduce significant systematic uncertainties in precision experiments, including those aiming to determine mixing parameters and explore CP violation. This talk will provide an accessible overview of why neutrino interaction physics is both essential and challenging, and how it connects nuclear and particle physics. I will outline current experimental limitations and discuss the key requirements for future progress: well-characterised neutrino beams, dedicated measurements, and new experimental strategies. These advances are not only crucial for interpreting results from current and future experiments, but also for enabling discoveries that may reshape our understanding of fundamental physics. As an illustrative example, I will introduce nuSTORM—a proposed facility based on stored muons—as a next-generation platform for precision neutrino scattering and searches for new physics.

24 Apr 2025

Seminar über Quanten-, Atom- und Neutronenphysik (QUANTUM)

Institut für Physik

14:15 Uhr s.t., IPH Lorentzraum 05-127

Prof. Dr. Piet O. Schmidt, Physikalisch-Technische Bundesanstalt & Leibniz Universität Hannover
Optical atomic clocks with eighteen significant digits are the most accurate measurement devices available to us with applications ranging from tests of fundamental physics to height difference measurements in relativistic geodesy. The uncertainty in trapped-ion clocks is limited by systematic frequency shifts and quantum projection noise. In my presentation, I will show how quantum engineering techniques can overcome these limitations. Quantum algorithms provide access to new clock species such as highly charged ions with reduced systematic shifts and high sensitivity to searches for new physics, including hypothetical fifth forces, variation of fundamental constants and dark matter candidates. Dynamical decoupling and entangled state spectroscopy in a multi-ion frequency reference offer suppression of systematic shifts, while improving the signal-to-noise ratio of the clock and thus the required averaging time to reach a certain resolution. These developments will pave the way towards a next generation of quantum-enhanced clocks that enter the 10-19 relative frequency uncertainty regime.

GRK 2516 Soft Matter Seminar

Uni Mainz

14:30 Uhr s.t., Minkowski Room, 05-119, Staudingerweg 7

Shikha Dhiman, JGU, Chemistry
TBA
at Zoom

GRK 2516 Soft Matter Seminar

Uni Mainz

15:00 Uhr s.t., Minkowski Room, 05-119, Staudingerweg 7

Michael te Vrugt, JGU, Physics
TBA
at Zoom

Zum Physikalischen Kolloquium Mainz


Liste der laufenden Seminare und Kolloquien

Veranstaltungstitel Termin und Ort Koordinator
Institutsseminar Kern- und Hadronenphysik Montags, 1415 Uhr, HS Kernphysik, Becherweg 45 Prof. Dr. Michael Ostrick
Seminar Festkörper- und Grenzflächenphysik Dienstags, 1200 Uhr, Newton-Raum, Staudingerweg 9, 1. Stock, Raum 122 (Nebengebaeude) Prof. Dr. Hans-Joachim Elmers
Seminar über Theorie der Kondensierten Materie/
Weiche Materie und Statistische Physik
Freitags, 1030 Uhr, Newton-Raum (LG 01-122) F. Schmid
P. Virnau
L. Stelzl
Theory of Condensed Matter: Hard Condensed Matter Tuesday, 1000 Uhr, Seminarraum K Prof. Dr. Jairo Sinova
Theorie Palaver Dienstags, 1430 Uhr, Lorentz-Raum (05-127) Upalaparna Banerjee
Federico Gasparotto
Pouria Mazloumi
Yong Xu
Physikalisches Kolloquium Mainz Dienstags, 1615 Uhr, HS Kernphysik, Becherweg 45 Prof. Dr. Friederike Schmid
Prof. Dr. Concettina Sfienti
PRISMA Colloquium Mittwochs, 1300 Uhr, Lorentz-Raum (05-127) Prof. Dr. Tobias Hurth
Quantengravitation-Seminar Donnerstags, Sozialraum der THEP; Institut fuer Physik (05-427). Prof. Dr. M. Reuter
Theoriekolloquium Donnerstags, 1600 Uhr, Newton-Raum (LG 01-122). Prof. Dr. P.G.J. van Dongen
Jun.-Prof. Dr. J. Marino
QUANTUM-Seminar Donnerstags, 1415, Lorentz-Raum (05-127) Prof. Dr. Peter van Loock
Dr. Lars von der Wense
Seminar experimentelle Physik der kondensierten Materie Donnerstags, 1400, Minkowski-Raum, 05-119, Staudingerweg 7 Univ-Prof. Dr. Jure Demsar
Univ.-Prof. Dr. Hans-Joachim Elmers
Univ.-Prof. Dr. Mathias Kläui
Univ.-Prof. Dr. Thomas Palberg
Seminar zu Themen in der Collider-Physik Freitags, 1230, Sozialraum ThEP (05-427) Riccardo Bartocci
Prisco Lo Chiatto
Nicklas Ramberg
Miroslava Mosso Rojas
MAINZ lecture series Mittwochs, 915, Staudingerweg 9, 3. Stock, Raum 122 Dr. M. Weides
Excellence@WORK XXXXX,XXXX Katrin Klauer
Seminar about Experimental Particle and Astroparticle Physics (ETAP) Montags, 1215, Staudingerweg 7, 5. Stock, Minkowski-Raum 119 Dr. DB. Ta

Weitere Veranstaltungen

Quantum Sonderseminar Seminarraum Quantum (02-427) Prof. Dr. Ferdinand Schmidt-Kaler

 

Beteiligte Einrichtungen: Institut für Physik,
Institut für Kernphysik,
Institut für Physik der Atmosphäre
Max-Planck-Institut für Polymerforschung, Max-Planck-Institut für Chemie
Technische Wartung: ducbao.ta (klammeraffe) uni-mainz.de