Wochenübersicht

Wochenübersicht für die Woche vom

18 Oct 2021 bis 24 Oct 2021 (KW 42)

KW41 - KW42 - KW43 - KW44

19 Oct 2021

Theorie-Palaver

Institut für Physik

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

Matthias Neubert, JGU Mainz
Jet cross sections at high-energy colliders exhibit intricate patterns of logarithmically enhanced higher-order corrections. In particular, so-called non-global logarithms emerge from soft radiation emitted off energetic partons inside jets. While this is a single-logarithmic effect at lepton colliders, at hadron colliders phase factors in the amplitudes lead to double-logarithmic corrections starting at four-loop order. This effect was discovered a long time ago, but not much is known about the higher-order behavior of these terms and their process dependence. We derive, for the first time, the all-order structure of these "super-leading logarithms" for generic \(2\to l\) scattering processes at hadron colliders and resum them in closed form.
at Zoom

Physikalisches Kolloquium

Institut für Kernphysik, Hybrid Seminar

Sonderseminar: 16 Uhr c.t., Staudinger-Hörsaal, Ackermannweg 10, MPI-P

Kirill Melnikov, TTP, Karlsruher Institute of Technology
To be announced

Sonderseminar

The location of the first colloquium is Staudinger-Hörsaal, Ackermannweg 10, MPI-P

20 Oct 2021

Seminar über Theorie der kondensierten Materie / TRR146 Seminar

K. Binder/ A. Nikoubashman / F. Schmid / G. Settanni / T. Speck / M. Sulpizi / P. Virnau

17:00 Uhr s.t., None

Thomas M Truskett,, Department of Chemical Engineering, The University of Texas at Austin
Linked-colloidal nanocrystal gels
at Zoom

IRTG Lecture

SPICE-Spin+X Seminar

TUK and JGU

15:00 Uhr s.t., None

Achim Rosch, University of Cologne
Archimedean screw and time quasi-crystals in driven chiral magnets
at Zoom and SPICE YouTube Channel

Theorie-Palaver

Institut für Physik

15:00 Uhr s.t., Staudingerweg 7, 05-427

Frank Saueressig, Nijmegen
The asymptotic safety program strives for a high-energy completion of gravity and gravity-matter systems by an interacting renormalization group fixed point, the Reuter fixed point. The fixed point renders the theory safe from unphysical divergences at high energies and equips the construction with predictive power. In this talk I will give a pedagogical introduction to the program. In particular, I will argue that the inclusion of form factors - generalizing the running couplings encountered in quantum field theory to curved spacetime - is essential for investigating questions related to the causality and unitarity of Asymptotic Safety. Moreover, I will outline how form factors provide a concrete perspective for formulating various quantum gravity programs in a unifying language.

aktuell

21 Oct 2021

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

Institut für Physik

14:00 Uhr s.t., None

Prof. Tanya Zelevinsky, Columbia University
Techniques for controlling quantum states of atoms have led to extremely precise metrology and studies of degenerate gases.  Extending such techniques to various types of molecules further enriches the understanding of fundamental physics, basic chemical processes, and many-body science.  Samples of diatomic molecules can be created by binding laser-cooled atoms, or by direct molecular laser cooling.  We explore both approaches and demonstrate high-precision metrology with an optical-lattice based molecular clock, as well as photo-chemistry in the highly nonclassical domain.
at Zoom