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)

SS 20:

Theoretical Particle Physics 2
Time and Place : Monday, 12:15 to 14:00,
                            Wednesday, 12:15 to 13:00; both times HS 1, PI (i.e., in the big lecture room).
First Lecture: April 20, 2020.
Last Lecture: July 19, 2020 (?).
Tutorials: Time and Place : The current planning is:
Group 1: Tuesday, 12:15 to 14:00; AVZ, Room 0.009; Tutor: Meng Shi.
Group 2: Friday, 16:15 to 18:00, AVZ, Room 0.009; Tutor: Bardia Najjari.
Of course, the times and location become relevant only if and when regular teaching resumes.
First session : The second week of classes.
Tutors: Meng Shi (Wegelerstr. 10, room 2021, phone 3718, email shimrac "at", and Bardia Najjari (Wegelerstr.10, room 2.023, phone 9411, email bardia "at"
The assignment sheets can be downloaded
Figures shown in class can be found here.
The identities with two-component spinors etc can be found here .

The lecture is aimed at students interested in experimental and/or theoretical particle physics. Prior knowledge of relativistic quantum mechanics, and the Standard Model of particle physics (as covered, e.g., in the Theoretical Particle Physics 1 class) 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!)

Only students who solve at least 50% of the homework problems of this class will be allowed to participate in the final exam.

VERY IMPORTANT: Currently regular lectures cannot take place. For the time being the lectures will therefore only be held electronically, via the eCampus system. In order to access the content, you first need to register for this course. Registration should be open as of now (April 9). All holders of a university ID (hence a university e-mail address) should be able to register for this course. Note that you need to register separately for the lecture and for the exercises (tutorials).
In order to access the content, click on "Contents of the lecture" on the eCampus site for this lecture (physics636), next to the cloud symbol. There you find two files for each academic hour (roughly), i.e. six files per week. The PDF files are just static files, containing something like a manuscript of the lecture, partly typed, partly in handwriting. The mp4 files show how the PDF files were written, i.e. they show "videos" (only of the "sheet of paper", not of me!), plus voice commentary. This roughly corresponds to what you would have seen on the blackboard, and heard, in a regular lecture. Of course, the mp4 files are much bigger; also, you need an mp4 player to play them, I'm using smplayer (on Ubuntu Linux), which works fine, many other players should work as well. (The standard Windows player works at well, at least on my laptop.)
In future I'll keep uploading a couple of files for each (roughly) 45 minutes lecture. The technical quality will hopefully improve as I get more practice. Of course, regular in-person lectures would be even better, and will start as soon as practical.
As I said at the beginning of the lecture (in lecture_1a.mp4), I'd like to know how many of you are currently in Bonn. Given travel restrictions and the shortage of international flights, this information may become relevant also when deciding when to switch back to normal in-person lectures. Those of you who aren't in Bonn can just send me a short e-mail (to drees "at"

Final exam: Wednesday, July 29, 10:00 to 12:00, in the AIfA lecture hall.
The exam will be written under the same rules as the exams during the pentecoast week (the delayed second round of exams for the previous winter term). Upon entering the building, you should sterilize your hands. There will be assigned seats. You'll have to wear a mask when entering or leaving the building and the lecture hall; you can (but don't have to) take it off during the exam. You must also sign a declaration that you're not feeling ill, and that you didn't have known contact with a CoVid-19 infected person in the last two weeks.
Since these admission procedures take some time, please be at the lecture hall some 10 or 15 minutes before the start of the exam. Note also that the lecture hall is in the astronomy institute, which is about 20 or 25 minutes on foot from the physics institutes.
Important: we are not allowed to admit people to the lecture hall where the exam takes place who do not satisfy the formal rules. This means that you must have registered for the exam, and you must have handed in at least 50% of your homework (or qualified to participate in a previous semester).
We have been instructed to "quarantine" the exame for a couple of weeks, so you will be told your (prelimiinary) grades later than what you are used to. You will still be given an opportunity to have a look at the exam, if you whish to.
I also remind you that failing in this (and the second) exam will not reduce the number of tries you have; of course, you'll have to wait a year before you can take this course again.

The lecture covers extensions of the Standard Model of particle physics. More specifically, the following topics will be covered:
1) Neutrino oscillations and neutrino masses
2) Grand Unification of the gauge interactions
3) Supersymmetry

G. Ross, Grand Unified Theories, discusses both supersymmetric and non-supersymmetric GUTs.
Drees, Godbole and Roy, Theory and Phenomenology of Sparticles, gives an in-depth treatment of supersymmetry, with emphasis on phenomenological aspects.
Baer, Tata, Weak scale supersymmetry: From superfields to scattering events, is similar in scope to the previous book, but uses a different notation.
S. Martin, A Supersymmetry Primer (on the arXiv), offers a down-to-earth introduction to supersymmetry.
Peskin and Schroeder, An Introduction to Quantum Field Theory, treats the underlying formalism, but also contains many particle physics applications.

WS 19/20:

Theoretische Physik 2
Ort und Zeit : Dienstag, 10:15 bis 12:00, und Donnerstag, 10:15 bis 12:00, jeweils im HS 1, PI (d.h., im grossen Hörsaal des PI)
Erste Vorlesung: 8. Oktober 2019.
Letzte Vorlesung: 30. Januar 2020.

Diese Vorlesung behandelt die klassische Elektrodynamik, sowie die spezielle Relativitätstheorie. Gegen Ende des Semester wird, falls die Zeit das zulässt, die Beschreibung der Elektrodynamik durch eine Lagrange-Funktion behandelt werden.

Übungen: Es sind bis zu 15 Gruppen vorgesehen; bis auf Eine finden sie am Freitag Nachmittag statt, eine Gruppe ist am Donnerstag Nachmittag von 13 bis 16 Uhr.
Zusätzlich wird ein `Drop-In Center' organisiert, wo Studierende Fragen zur Vorlesung und/oder zu den Übungen stellen können. Termin: Mittwochs, 12:30 bis 14:00 Uhr, AVZ HS118 (Raum 1.019).
Der reguläre Übungsbetrieb beginnt in der 2. Vorlesungswoche.
Organisation der Übungen: Dominik Köhler (Wegelerstr. 10, Zimmer 2.013, Email dkoehler 'at'

Nur Studierende, die mindestens 50% der Hausaufgaben bearbeitet haben, werden zur Abschlussklausur zugelassen! Bitte geben Sie die bearbeiteten Hausaufgaben jeweils dienstags in der (Pause der) Vorlesung ab; bitte keine Abgabe in Gruppen von mehr als zwei Personen (was nicht ausschliesst, dass Sie die Aufgaben gemeinsam mit mehreren KomilitonInnen lösen). Die neuen Haus- und Anwesenheitsaufgaben werden ebenfalls dienstags verteilt.
Die Zettel können auch hier herunter geladen werden.

1. Klausur: 6.2.2020, 9 bis 12 Uhr
Die Klausureinsicht findet statt am Mittwoch, den 12.2.2020 von 14:00 bis 16:00 im Konferenzraum 2 des PI (PI 1.049).

Die Nachklausur wird am 4.6.2020 von 9 bis 12 Uhr stattfinden. Es werden strenge Hygieneregeln gelten. Insbesondere werden Sie einen Mund-Nasen-Schutz (z.B. eine Gesichtsmaske) benötigen. Bitte beachten Sie auch die E-Mail die Ihnen zu diesen Thema am 8.5. zugegangen ist.
Da die Anzahl der angemeldeten TeilnehmerInnen die Corona-Kapazität des WP Hörsaals übersteigt, müssen wir die Klausur parallel in zwei Hörsälen schreiben. Die Aufteilung erfolgt alphabetisch per Nachnamen. Studierende, deren Nachname zwischen A und R liegt, schreiben im WP; Studierende mit Nachnamen zwischen S und Z schreiben im Hörsaal 1.
Wegen des etwas komplizierten Verfahrens zum Einlass (s. meine Mail vom 29.5.) werden wir die Türen bereits um 8:30 öffnen. Bitte seien Sie rechtzeitig zur Stelle!
Nach dem 4.6. werden die Klausuren zunächst für zwei Wochen in Quarantäne geschickt, d.h. die Korrektur beginnt erst zwei Wochen später. Entsprechend werden die Ergebnisse natürlich auch erst mit Verspätung vorliegen. Sie werden dann auch über die Modalitäten der möglichen Klausureinsicht informiert werden.

Inhalt :
0) Motivation: Gründe für die Behandlung der Elektrodynamik
1) Elektrostatik
2) Potenzialproblem
3) Elektrostatische Felder in Materie
4) Magnetostatik
5) Die Maxwell-Gleichungen
6) Lösung der Maxwell-Gleichungen
7) Spezielle Relativitätstheorie
8) Relativistische Behandlung der Felder
9) Lagrange-Beschreibung der Elektrodynamik

J.D. Jackson, Classical Electrodynamics, ist der Klassiker (auch auf Deutsch erhältlich), auf hohem Niveau; geht Einiges über den Stoff der Vorlesung hinaus.
D.J. Griffiths, Introduction to Electrodynamics , trifft das Niveau der Vorlesung recht gut (auch auf Deutsch erhältlich).
D. Landau und E.M. Lifschitz, Lehrbuch der Theoretischen Physik: Band 2 (klassiche Feldtheorie), Band 8 (Elektrodynamik der Kontinua), ist ebenfalls ein Klassiker auf hohem Niveau.
W. Greiner, Theoretische Physik, Band III , ist sehr expliziert.

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. In particular, students who have their own idea about a Master topic 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.
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