Announcements

• Bethe-Colloquium by Yuval Grossman (Cornell University, LEPP), July 4th, 2019
• Bethe Forum "Number Theoretic Methods in Quantum Physics", July 15th - 19th, 2019
  Organizers: H. Jockers (PI Bonn, bctp), A. Klemm (PI Bonn, bctp), H. Monien (PI Bonn, bctp), G. Oberdieck (HIM Bonn) and D. Zagier (MPIfM, Bonn)
• Bethe Forum "Multihadron Dynamics in a Box", Sept. 9th - 13th, 2019
  Organizers: M. Mai (Washington, DC), U.-G. Meißner (Bonn / Jülich), A. Rusetsky and C. Urbach (both Bonn)
• Lecture Series "Machine Learning and its Applications" by Fabian Ruehle (CERN), Oct. 7th - 10th, 2019

Further information will be given as soon as it is available.

As a major outcome of the work on nuclear lattice effective field theory in the DFG-funded project CRC 110 "Symmetries and the emergence of Structure in QCD", a monograph was just published by Timo A. Lähde (associated scientist) and by Ulf-G. Meißner in the Springer Lecture Notes in Physics Series as volume 957 (May 2019).

Members of the DFG Research Unit 2239 will get together for a final meeting at the bctp. The goal of the DFG Research Unit 2239 was to provide theoretical calculations, numerical tools and analyses for the systematic study of new physics phenomena in the context of the LHC. Results have been discussed in regular meetings.

Further information about the Research Unit and the program of the meeting can be found here.

The last Bethe Colloquium of summer term 2019 is scheduled for Thursday, July 4th, 2019, at 4:15 pm in Hörsaal I.

• Yuval Grossman (Cornell University, LEPP)
• Neutrinos as the key to the universe as we know it
• Hörsaal I, Physikalisches Institut

Abstract: There are three open questions in physics which seem unrelated: Why is there only matter around us? How do neutrinos acquire their tiny masses? Why do all particles in nature have integer electric charges? It turns out that these open questions are related. In this talk I will explain these open questions, the connection between them, and describe the ongoing theoretical and experimental efforts in understanding them.

We are happy to announce the Bethe Forum on "Number Theoretic Methods in Quantum Physics", July 15th to 139h, in the Bethe Center for Theoretical Physics in Bonn. The Forum is organized by H. Jockers (PI Bonn, bctp), A. Klemm (PI Bonn, bctp), H. Monien (PI Bonn, bctp), G. Oberdieck (HIM Bonn) and D. Zagier (MPIfM, Bonn).

For more information as well as the registration form please see the event webpage.

From September 9 - 13, 2019, the Bethe Forum "Multihadron Dynamics in a Box" will take place in the Bethe Center for Theoretical Physics in Bonn. The Forum is organized by M. Mai (Washington, DC), U.-G. Meißner (Bonn / Jülich), A. Rusetsky and C. Urbach (both Bonn).

For more information as well as the registration form please see the event webpage.

Recent years have witnessed a growing interest in the study of three-particle systems in lattice QCD. Substantial progress has been achieved both in the development of the methods that enable one to extract infinite-volume observables from lattice data produced on finite-size lattices, as well as in Monte-Carlo calculations of the three-particle systems, but important recent developments in the two-particle sector will also be addressed, since these questions are inherently related to each other.
In particular, it is planned to discuss the following questions:

• What is the best strategy in the analysis of data in the three-particle sector?
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• What are the quantities to extract form the finite-volume sector?
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• How the further progress in the field looks like after the derivation of the quantization condition (analysis of the data on the Roper resonance, three-particle decay matrix elements, etc.)?
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• What are the present status and immediate perspectives of lattice simulations in the three-particle sector? For example, can one expect the calculation of the excited levels in the three-particle sector? Are the calculations in many-body (four and more) systems feasible in a forseeable future?

Fabian Ruehle (CERN, Geneva) will give a Lecture Series on "Machine Learning and its Applications" from October 3 - 11, 2019, in the Bethe Center for Theoretical Physics in Bonn.

Abstract: Machine Learning techniques, in particular neural networks, have become an integral part of our lives. Due to their versatile nature, they are applied in the private and academic sector with tremendous success. In these lectures, I will first review the basic building blocks of neural networks and how they are trained. I will then discuss popular neural network architectues and how they are used in unsupervised, semi-supervised and supervises machine learning. I will also intrudce other common machine learning techniques and present example applications to problems in Physics (ranging from Astrophysics and Cosmology to Particle Physics, Mathematical Physics and String Theory). In the exercises, I will use the techniques introduced in the lectures to solve simple problems in real time.

For more information please check the event webpage.