TUM – Technical University of Munich Menü

Prof. Dr. Björn Garbrecht



Academic Career and Research Areas

The group of Professor Garbrecht (b. 1977) performs research on particle physics processes in the early universe. The challenge is that often these cannot be considered as isolated scattering processes. This may be due to the finite temperature after the Big Bang or due to the strongly curved space-time at this time. For this purpose, Professor Garbrecht's group develops methods of describing high-energy reactions out of thermal equilibrium as well as quantum fields in expanding space-times. An important application is the dynamical generation of the matter-antimatter asymmetry of the universe, for which a deviation from thermal equilibrium is a necessary condition. Of particular interest are models that establish a connection with experimental tests of charge-parity violation, of electroweak symmetry breaking and neutrino oscillations.
Björn Garbrecht studied physics in Heidelberg and at the University of Massachusetts, Amherst. After obtaining his doctorate from Heidelberg in 2005 he went on to become a postdoctoral researcher in Manchester, UK, and at the University of Wisconsin–Madison. From 2009 to 2012 he held the position of assistant professor and led a research group at RWTH Aachen. In 2012, he was appointed professor at TUM.

Key Publications (all publications)

Garbrecht B : “Baryogenesis from Mixing of Lepton Doublets.” Nucl. Phys. B. 2013; 868(3): 557-576.


Garbrecht B, Herranen M: “Effective Theory of Resonant Leptogenesis in the Closed-Time-Path Approach.” Nucl. Phys. B. 2012; 861(1): 17-52.


Beneke M, Garbrecht B, Fidler C, Herranen M, Schwaller P: “Flavoured Leptogenesis in the CTP Formalism.” Nucl. Phys. B. 2011; 843(1): 177-212.


Chung DJH, Garbrecht B, Ramsey-Musolf MJ, Tulin S: “Yukawa Interactions and Supersymmetric Electroweak Baryogenesis.” Phys. Rev. Lett. 2009; 102(6): 061301.


Battye RA, Garbrecht B, Moss A: “Constraints on Supersymmetric Models of Hybrid Inflation.” JCAP. 2006; 09(2006): 007.