Summer semester 2026

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.

Fri, 24th Apr

  • Time: 14:15
  • Speaker: Yuto Sugimoto (Tohoku University)
  • Invited by: T. Wettig
  • Title: Tensor renormalization group method for (3+1) dimensional QCD in the strong coupling limit

Tue, 28th Apr

  • Time: 15:15
  • Seminar cancelled

Fri, 8th May

  • Time: 14:15
  • Speaker: Sasa Prelovsek (University of Ljubljana and the Jožef Stefan Institute)
  • Invited by: Sara Collins
  • Title: Structure and spectroscopy of exotic hadrons from lattice
Abstract I will review our recent lattice studies of exotic hadrons, in particular tetraquarks with two heavy quarks relevant to recent experimental discoveries. The states that reside above or slightly below threshold have been inferred from the scattering on the lattice. The structure has been extracted by probing the hadrons with the electromagnetic current, which renders the charge distributions of individual quark flavors, and enables distinction between molecular and diquark-antidiquark compositions.

Tue, 12th May

  • Time: 15:15
  • Speaker: Dr. Yang Fu (MIT)
  • Invited by: G. Bali
  • Title: Two-photon exchange contribution in hydrogen-like atoms from lattice QCD
Abstract The proton is one of the basic building blocks of all atoms. An accurate knowledge about the proton charge radius not only gives us useful information on the size and structure of the proton, but it also provides a crucial precision test of the Standard Model at low energy. In addition, it has an impact on the Rydberg constant, one of the most accurately measured physical constants. The most precise determination of the proton charge radius is from the measurement of the muonic hydrogen spectrum, while the theoretical uncertainty is dominated by a hadronic effect called two-photon exchange. In this talk, I will present the first lattice QCD calculation of the two-photon exchange contribution, as well as a result from combining dispersion relations and lattice QCD.

Fri, 15th May

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Tue, 19th May

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Fri, 22rd May

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Tue, 26th May

No seminar (Day after Pentecost)

Fri, 29th May

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Tue, 2rd June

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Fri, 5th Jun

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Tue, 9th Jun

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Fri, 12th Jun

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Tue, 16th Jun

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Fri, 19th Jun

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Tue, 23th Jun

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Fri, 26th Jun

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Tue, 31th Jun

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Fri, 3th Jul

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Tue, 7th Jul

  • Time: 15:15
  • Speaker: Raphael Lehner (KEK TSUKUBA)
  • Invited by: T. Wettig
  • Title: Determining Two-Pion Scattering Lengths in the O(4) Non-Linear Sigma Model
Abstract tba

Fri, 10th Jul

  • Time: 14:15
  • Speaker: Maren Käfferlein
  • Invited by: Simon Pfahler
  • Title: Investigating the analytic structure of machine-learning models for the Dirac equation
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Tue, 14th Jul

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Fri, 17th Jul

No seminar (Tag der Physik und Mathematik, tbc)

Past Seminars