Johannes Henn

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Johannes Henn (born August 28, 1980 in Munich ) is a German theoretical particle physicist.

Research activities

Johannes Henn deals, among other things, with scattering amplitudes in quantum field theory , with which accelerator experiments can be precisely described. This research field combines theoretical and experimental physics and aims to research elementary particles as the basic building blocks of matter and to understand the laws of nature according to which they interact with one another.

Together with Jan Plefka and David Drummond he discovered a hidden Yang symmetry of the N = 4 supersymmetric Yang-Mills theory . This symmetry explains many simple properties of scattering amplitudes and suggests that this theory is the first nontrivial quantum field theory in four dimensions that is exactly solvable. In particular, Henn succeeded in proving an exact formula for 4- and 5-particle scattering processes in the N = 4 supersymmetric Yang-Mills theory. Furthermore, he showed that bound states in this theory can be exactly solved due to hidden conformal symmetries, similar to the quantum mechanical Kepler problem (with the Runge-Lenz vector as the conservation quantity ) and the hydrogen atom .

Henn also developed an innovative method for calculating Feynman integrals based on differential equations . This allows the properties of the special functions that occur to be better understood. The new method has now become the standard and has found many applications, for example in the phenomenology of elementary particles.

Scientific career

Henn began his scientific career with a degree in physics, which he completed at the University of Augsburg , the Université de Savoie and the École normal supérieure de Lyon . After completing his doctorate at the Laboratoire d'Annecy-Le-Vieux de Physique Théorique, he spent three years researching as a postdoc at the Humboldt University in Berlin . In 2011 he moved to the Institute for Advanced Study (IAS) in Princeton . From there he was appointed W3 professor at Johannes Gutenberg University Mainz in 2015 , where he headed a scientific working group for theoretical physics. Since October 2018 he has been director at the Max Planck Institute for Physics and honorary professor at the Ludwig Maximilians University in Munich .

Awards and memberships

For his research activities, Johannes Henn received an ERC Consolidator Grant worth around 2 million. Since 2018 he has been coordinating a Franco-German doctoral college with his physicist colleagues Benjamin Basso (Laboratoire de Physique) and David Kosower (Institut de Physique Théorique, CEA Saclay).

Publications

Web links

Individual evidence

  1. ↑ Yangian symmetry of scattering amplitudes in N = 4 super Yang-Mills theory, D. Drummond J. Henn, J. Plefka
  2. ^ Conformal Ward identities for Wilson loops and a test of the duality with gluon amplitudes
  3. ↑ Solvable Relativistic Hydrogenlike System in Supersymmetric Yang-Mills Theory
  4. ↑ Multiloop integrals in dimensional regularization made simple
  5. ↑ Physicist Johannes Henn receives ERC Consolidator Grant. January 31, 2017
  6. ^ German-French doctoral college
personal data
SURNAME Henn, Johannes
BRIEF DESCRIPTION German theoretical particle physicist
DATE OF BIRTH August 28, 1980
PLACE OF BIRTH Munich