Winter semester 2025/26

Tuesday seminars start at 15:15. Friday seminars start at 14:15.

Unless otherwise stated, the seminars will be held in PHY 5.1.34A.

Tue, 14th Oct 2025

  • Time: 15:15
  • Speaker: Martin Pröbstl (Master Vortrag)
  • Invited by: G. Bali
  • Title: Lattice QCD determination of the mesonic SU(3) ChPT LECs

Tue, 25th Nov 2025

  • Time: 15:15
  • Speaker: M. Padmanath (IMSc Chennai, HBNI Mumbai)
  • Invited by: S. Collins
  • Title: Dibaryons and dimesons with heavy quarks using lattice QCD
Abstract In this talk, I will delve into our recent lattice QCD investigations focusing on dibaryons and dimeson systems featuring at least two heavy quarks. I will particularly highlight our research on doubly charm and bottom-charm tetraquarks, which are of contemporary scientific interest.

Fri, 28th Nov 2025

27th/28th Nov 2025: FOR2926 meeting/Volodyafest

Tue, 2nd Dec 2025

  • Time: 15:15
  • Speaker: Johanna Erdmenger (Universität Würzburg)
  • Invited by: G. Bali
  • Title: Applications of gauge/gravity duality to strongly coupled gauge theories
Abstract I will explain in detail how the AdS/CFT correspondence may be generalized to describe large-N confining gauge theories involving quarks (i.e. particles in the fundamental representation of the gauge group) that exhibit chiral symmetry breaking. In addition to describing applications to QCD-like theories, I will also present recent work on composite Higgs models that involves non-abelian flavour groups. -- At the very end, I will briefly mention recent work on using physics concepts such as entropy functions and generalized RG transformations for improving the trainability of neural networks in machine learning.

Fri, 5th Dec 2025

  • Time: 14:15
  • Speaker: Stefan Solbrig (Universität Regensburg)
  • Title: The diff3 algorithm in Git and an HPC intro

Tue, 9th Dec 2025

  • Time: 15:15
  • Speaker: Lea Kutsch (Universität Bonn und FZ Jülich)
  • Invited by: T. Wettig
  • Title: Reducing the signal to noise problem by contour deformations in the Schwinger model

Wed, 10th Dec 2025

10:00 - 17:00: Graduate Workshop (PHY 5.1.34A)

Winter break: 24th Dec 2025 - 6th Jan 2026

Happy Holidays and a Happy New Year 2026!!!

Tue, 20th Jan 2026

  • Time: 15:15
  • Speaker: Oliver Schnetz (Universität Hamburg)
  • Invited by: A. v. Manteuffel
  • Title: Graphical functions
Abstract We give an introduction to the theory of graphical functions which are massless three point integrals in perturbative Quantum Field Theory (QFT). The theory of graphical functions are a very powerful tool to (analytically) perform some QFT calculations to high loop orders.

Tue, 3rd Feb 2026

  • Time: 15:15
  • Speaker: Mattia Bruno (University/INFN Milan Bicoccia)
  • Invited by: C. Lehner
  • Title: Spectral densities from Lattice Euclidean correlators
Abstract Spectral densities connect correlation functions computed in quantum field theory to observables measured in experiments. For strongly-interacting theories, their non-perturbative determinations from lattice simulations are therefore of primary importance. They entail the inverse Laplace transform of correlation functions calculated in Euclidean time. In this talk I will describe a recent proposal for their definition and extraction based on the Mellin transform, both in the continuum and on the lattice, with their corresponding generalization to smeared spectral densities, together with possible outlooks.

Fri, 6th Feb 2026

Tag der Mathematik und Physik (tbc)

Tue, 10th Feb 2026

  • Time: 15:15
  • Speaker: Yu Wu (University of Science and Technology of China)
  • Invited by: A. v. Manteuffel
  • Title: Analytic computation of all three-loop five-point massless planar Feynman integrals
Abstract Driven by the development of the canonical differential equation method and new algorithms for constructing short integration-by-parts systems, analytic computations of multi-loop and multi-leg Feynman integrals have entered a new era. We have obtained a complete analytic solution for all planar massless five-point Feynman integrals at three loops. The results represent the state-of-the-art Feynman integral computations and will in future provide precision physics input for the next generation of colliders.

Fri, 6th Mar 2026

!!!extra seminar!!!

  • Time: 14:15
  • Speaker: Prof. Shinji Takeda (Kanazawa University)
  • Invited by: T. Wettig
  • Title: Recent progress of tensor renormalization group approach