Professor Manuel Drees

I am Professor for Theoretical Particle and Astro-Particle Physics at the Rheinische Friedrich-Wilhelms-Universtät Bonn.


SS 04: Theoretical Astro-Particle Physics
WS 04/05: Theoretical Particle Physics 1
SS 05: Theoretical Particle Physics 2
         Seminar on Advanced Topics in Particle and Quantum Field Theory
WS 05/06: On sabbatical leave
SS 06: Astro-Particle Physics (together with Prof. Peter Schneider)
         Seminar on Relativistic Quantum Field Theory (together with Prof. Hans-Peter Nilles).
WS 06/07: Theoretische Physik 1
SS 07: Theoretische Physik 2b
WS 07/08: Collider Physics
SS 08: Astro-Particle Physics (together with Prof. Uli Klein)
WS 08/09: Theoretical Particle Physics 1
SS 09: Theoretical Particle Physics 2
WS 09/10: Collider Physics
SS 10: Theoretical Astroparticle Physics;
         Seminar on Astroparticle Physics (together with Prof. Marek Kowalski).
WS 10/11: On sabbatical leave
SS 11: Theoretische Physik 1
         Seminar on Astroparticle Physics (together with Prof. Marek Kowalski).
WS 11/12: Theoretische Physik 2
SS 12: Theoretical Astroparticle Physics
WS 12/13: Theoretical Particle Physics 1
SS 13: Theoretical Particle Physics 2
         Seminar on Astroparticle Physics (together with Prof. Marek Kowalski).
WS 13/14: Physics of the Higgs Particle
SS 14: Theoretische Physik 3: Quantenmechanik
WS 14/15: Advanced Quantum Theory
            Seminar on Hunting Physics beyond the Standard Model (with Profs. Dreiner, Hanhart, Krewald, Luu and Wirzba)
SS 15: Theoretical Astroparticle Physics
WS 15/16: Theoretical Particle Physics 1
SS 16: Theoretical Particle Physics 2
WS 16/17: Theoretical Astroparticle Physics
SS 17: Theoretische Physik 1
        Seminar on Quantum Field Theory (with profs. Dreiner and Nilles)
WS 17/18: Theoretical Particle Physics 1
SS 18: Theoretical Particle Physics 2
        Seminar on Evidence for Physics beyond the SM (with profs. Dreiner and Nilles)
WS18/19: Theoretical Particle Physics 1
SS 19: Theoretical Astroparticle Physics
WS19/20: Theoretische Physik 2
SS 20: Theoretical Particle Physics 2
        Seminar on Advanced Topics in Quantum Field Theory (with profs. Dreiner and Kubis)
WS20/21: Theoretical Particle Physics 1
WS 21/22: Advanced Quantum Theory

SS 22:

Theoretical Astroparticle Physics
Time and Place: Tuesday, 08:15 to 10:00, lecture hall, HISKP; Thursday, 9:15 to 10:00, lecture hall, HISKP (on the ground floor).
First Lecture: April 5, 2022.
Last Lecture: July 14, 2022.
Time and Place:
Tuesday, 3:15 to 5:00 p.m., AVZ, rm. 0.021 (Uuml;bungsroom 5); and Wednesday, 2:15 to 4:00 p.m., HISKP, seminar room 2.
Tutors: Wenbin Zhao (Wegelerstr.10, room 2.021; tel. 3718, e-mail wenbin.zhao "at" and Chenhuan Wang (Wegelerstr.10, room 2.021, tel. 3718, e-mail s6cnwang `at'

At least at the beginning of the semester the lecture will be given in hybride mode again: I'll give the lecture in the lecture hall, but it will also be live-streamed via Zoom, and a recording of the lecture will be made available on eCampus for one week; the recording will be deleted after one week, partially for reasons of data privacy issues. The Zoom link for this lecture is
here . The "coordinates" are:
Meeting ID: 661 9793 9324, Passcode: 713535
One tap mobile +496950502596,,66197939324#,,,,*713535# Germany +496971049922,,66197939324#,,,,*713535# Germany
At least for the time being it is strongly recommended that you wear a mask at least while moving inside university buildings; of course, you are free to also wear a mask during the lecture itself. (I will not wear one during the lecture, in order to be more easily understood.) As far as I know there will be no more access restrictions during the summer term (no more "3G rule").

The assignment sheets can be downloaded here.
The figures shown on the projector during class can be found here.

Only students who have done at least 50% of the homework of this class will be permitted to take the final exam! In order to check this, the tutor will pass a list at the beginning of each tutorial, in which the students will indicate which problem(s) they solved. The tutor will use this list to call someone to the board, to present the solution. The solution need not be entirely correct to be counted towards the 50%, but you must have made a serious attempt at solving the problem.
If desired, students can also hand their written solutions to the tutor, asking for it to be corrected. This may be of interest to you if your solution differs from the one being presented, and you wish to know whether your solution is also ok.

This lecture deals with particle physics aspects relevant for our (tentative) understanding of the Universe, in particular of the very early universe, i.e. the era up to and including Big Bang nucleonsynthesis. The lecture is aimed at students interested in experimental and/or theoretical (astro-)particle physics. Prior knowledge of relativistic quantum mechanics, and the Standard Model of particle physics will be assumed. I will occasionally use results from Quantum Field Theory, but one should be able to follow this class without having taken lectures in Quantum Field Theory first. (Of course, everybody interested in particle theory should take the QFT classes, too!) Similarly, I will use some results from General Relativity (chiefly, the Friedman Robertson Walker metric) without derivation. Prior knowledge of popular extensions of the Standard Model - in particular, Supersymmetry - is helpful but not essential.

The following topics will be covered:
1) Introduction: the evolution of the universe in 30 minutes
2) Friedman-Robertson-Walker metric
3) Thermodynamics in an expanding universe
4) Big Bang Nucleosynthesis as a laboratory for New Physics
5) How Dark Matter may have been made
6) Baryogenesis: making baryons
7) Inflation: basics and simple models
8) Inflation: quantum fluctuations as seed for structure formation
9) Inflation: reheating the Universe

Particle physics aspects of today's universe will not be covered. Many of these topics will be covered in a dedicated lecture next semester (i.e. in the WS 2022/23).

M.E. Turner and E.W. Kolb, The Early Universe, is still the standard text, written from a particle physics oriented perspective.
Drees, Godbole and Roy, Theory and Phenomenology of Sparticles, gives an in-depth treatment of supersymmetry, with emphasis on phenomenological aspects, and a lengthy chapter on cosmological aspects.

Seminar on Advanced Quantum Field Theory (with Prof. Claude Duhr and Dr. Florian Loebbert)
Time and Place : Wednesday, 10:15 to 12:00, PI, BCTP Seminar Room.
First Meeting: April 13, 2022 (in the second (!) week of classes).
Last possible seminar: July 13, 2022.

This seminar will cover some topics in modern quantum field theory that are typically not covered in the two regular QFT lectures covered here. We will cover both topics that are immediately relevant for phenomenology and some more formal topics.
As usual in a student seminar, students will give hour-long talks on a topic of their choice. The Literature relevant for each topic will be provided by the supervisor.
The students should give a practice talk to the advisor about one week before the real talk; the latter will be graded (for MSc students). This "practice talk" should at least include going through the material / slides together with the advisor.

Possible topics include:
R/xi gauge in theories with broken symmetry (as in the elw sector of the SM)
Radiative symmetry breaking
Running parameters and the renormalization goup
The electroweak equivalence theorem
The renormalization of the electroweak sector of the SM
Electroweak precision tests
See-saw mechanism and neutrino masses
The planar limit of Yang-Mills theory ("Large NC")
Compactification of additional spatial dimensions (Kaluza-Klein theories)
N=4 Super Yang-Mills theory
The Coleman-Mandula theorem
The Haag-Lopuszanski-Sohnius theorem

Weekly Theoretical High Energy Physics seminar

Master and Doctoral Theses

Please contact me directly regarding possible topics.
I expect a Master thesis to contain new, previously unknown, scientific results. So far nearly all Bonn Diploma and Master theses in my group have led to journal publications. While I am (nearly) always available for questions and discussions, I generally encourage students to work as independently as possible. This means that I do not require regular progress reports; I expect students who have some questions to come to me on their own initiative.
Also, students who have their own idea about a topic for a Master thesis are very welcome, if it falls in my area of expertise.

If you are interested, please contact me directly for further information. I also encourage you to talk to some of the other members of my group before committing yourself.
Group Homepage