Color-Meets-Flavor News

Second CharmInDor mini workshop on rare charm decays and CPV, Dortmund

April 23 - April 24, 2024

Scientific organizers: Prof. Gudrun Hiller & Dr. Dominik Mitzel (TU Dortmund)

Get ready for the second instance of our in-house mini workshop in Dortmund on rare charm decays and CPV from 23 Apr - 24 Apr 2024. As last year, the idea is to have an informal meeting between the experts of the Color-Meets-Flavor institutes Bonn, Jülich, Dortmund and Siegen and invited friends with plenty of time for discussions to understand where we are and identify future projects. This year we'll also look a bit at the more distant future and opportunities beyond the LHC.

More information can be found here.

First Color Meets Flavor PhD School

March 18 - March 22, 2024

The first Color Meets Flavor PhD school took place in Bad Honnef. About 70 international students, as well as 15 lecturers, supervisors and the organizers Prof. Johannes Albrecht (TU Dortmund), Prof. Florian Bernlochner (Universität Bonn) and Prof. Alexander Lenz (Universität Siegen) participated. The program contained lectures held by Alexey Petrov, Maxwell Hansen, Gino Isidori, Marie-Helen Schune and Miguel Escudero, together with two evening talks by Zoltan Ligeti (Berkeley) und Guy Wilkinson (Oxford). Furthermore, a poster session was held by the students. Another part of the school was an excursion to the nearby radio telescope and a hands-on session regarding building your own detector, which was very much enjoyed especially by theoretical physicist.

The support from the physics center was very good and pleasant - we should probably repeat that.

More information about the program and the contributions can be found here.

NRW Minister of Science and Culture Ina Brandes visits ELSA electron accelerator

March 06, 2024

The Minister of Science and Culture in North Rhine-Westphalia visited the electron accelerator ELSA, which is situated at the Campus Poppelsdorf of the University of Bonn. For the visit she was greeted by the president of the University of Bonn, Rektor Prof. Dr. Dr. h.c. Michael Hoch, and the dean of the faculty of mathematics and natural sciences, Prof. Dr. Walter Witke. In addition, the presidents of the TU Dortmund University and the University of Siegen, Prof. Dr. Manfred Bayer and Prof. Dr. Stefanie Reese, joined the visit.

A more detailed article by the University of Bonn is available here.

Ina Brandes visits ELSA thumbnail Photo credits: Volker Lannert/University of Bonn

Color-Meets-Flavor Bad Honnef Physics School - Bonn, Dortmund, Siegen

March 17 - 22, 2024

Scientific organizers: Prof. Johannes Albrecht (TU Dortmund), Prof. Florian Bernlochner (Universität Bonn), Prof. Alexander Lenz (Universität Siegen)

Physikzentrum Bad Honnef, Germany

Quark flavor physics studies the transitions of quarks via the weak interaction. Since quarks carry a color charge they do not exist as free particles, but are bound into colorless hadrons. Thus for a clear identification of the fundamental quark transitions a control of the hadronic effects is indispensable - color meets flavor.

Review lectures will provide a broad overview over current highlights of the field, accompanied by hands-on sessions on detector development and deep learning based data analysis as well as inspiring evening lectures.

Link for more description

Flavor Physics Workshop Meinerzhagen - Bonn, Dortmund, Siegen

February 7 - 9, 2024

Scientific organizers: Dr. Dominik Mitzel (TU Dortmund)

Meinerzhagen, Germany

From 7-9 February 2024, a flavor physics workshop was held in Meinerzhagen for doctoral and master's students from Aachen, Bochum, Bonn, Dortmund, Karlsruhe, and Siegen. The workshop comprised lectures on various topics in theoretical and experimental flavor physics. The program was completed with contributions on hadronic and medical physics.


MINT-EC Camp in Bonn

November 8 - 10, 2023

From 8-10 November 2023, participants will be offered an exciting and varied programme at the Physics Institute of the University of Bonn: The focus will be on building their own small particle detector. The programme also includes lectures on particle physics, a cloud chamber workshop and laboratory visits to the Research and Technology Centre for Detector Physics at the University of Bonn. There will be plenty of opportunities to ask all kinds of questions and learn more about the physics of the smallest particles and the construction of detectors that detect and measure the particles.


Link for more description and registration

Woche der Teilchenwelt: Film presentation Particle Fever and expert panel in Bonn

November 10, 2023

On November 10, the captivating film "Particle Fever" will be screened in the Wolfgang Paul Lecture Hall - an absolute must for all science enthusiasts! The film highlights the exciting world of particle physics and takes viewers on a thrilling journey into the heart of the Large Hadron Collider (LHC) at CERN. Experience the groundbreaking discoveries and fascinating stories of the researchers. After the screening, a panel of experts will be on hand to discuss and answer your questions. This is your opportunity to dive deep into the world of particle physics and learn more about the latest developments in the field.


Woche der Teilchenwelt: Film presentation Particle Fever and get together in Siegen

November 9, 2023

From the 6th to the 12th of November 2023, Siegen becomes a hub for enthusiasts of particle physics. Join us in exploring the wonders of the particle world during this special week. Below is the schedule for the exciting activities on November 9th 2023:

  • 16:45 - Particle Physics Exhibition at the University of Siegen
  • 18:00 - Film Screening “Particle Fever” - Documentary on the discovery of the Higgs boson
  • 20:00 - Conclusion of the event with Siegerländer specialties

LHCb’s Outer Tracker Relocated to GSI for New Research Ventures

October 5, 2023

The LHCb detector's Outer Tracker (OT), a significant portion of which was constructed by the Dortmund working group, has been transported to the GSI in Darmstadt, Germany. After being replaced by the Scintillating Fibre (SciFi) sub-detector at LHCb, the OT journeyed through France and reached GSI on August 25. It's now set to play a key role in the PANDA detector at the FAIR accelerator facility, furthering research into the enigmatic strong force. The OT's intricate modular design will continue advancing particle research at its new home.

News Article

First Direct Observation of Collider Neutrinos with the FASER Experiment - PRL Journal Club. Bonn

September 26, 2023

Neutrinos are among the most abundant particles in the Universe, but they rarely interact with matter: trillions pass through us every second, but most of us will never have even a single one interact with the matter in our bodies. Nonetheless, scientists can study these particles using high-intensity neutrino sources and detectors that are large enough to overcome the rarity of neutrino interactions. In this way, neutrinos have been observed from the Sun, from cosmic-ray interactions in the atmosphere, from Earth’s interior, from supernovae and other astrophysical objects, and from artificial sources such as nuclear reactors and particle accelerators in which a beam of particles hits a fixed target. But no one had ever detected neutrinos produced in colliding beams. This feat has now been achieved by the Forward Search Experiment (FASER), located at the Large Hadron Collider (LHC) at CERN in Switzerland. Florian Bernlochner (University of Bonn) and colleagues sat down with the Physical Review Journal Club to discuss the team's exciting results, which were recently published in Physical Review Letters and summarized in Physics Magazine. Bernlochner and colleagues provided a short presentation of their experiment and observations, followed by a live question-and-answer session moderated by David Saltzberg, UCLA.


Youtube Video

Journal Article

Bonn News Article

New World Record: Thinnest Ever Pixel Detector Installed in Belle II (3. August 2023). Bonn

August 3, 2023

The Belle II cooperation project at the Japanese research center KEK is helping researchers from all over the world to hunt for new phenomena in particle physics. The international experiment has now reached a major milestone after a team successfully installed a new pixel detector in its final location in Japan. The size of a soda can, the detector was developed in order to make out the signals coming from certain types of particle decays, that can shed light on the origin of the matter-antimatter asymmetry that has been observed in the universe. The installation ran without a hitch and is a key milestone in the evolution of the experiment and German-Japanese research collaboration.

Bonn News Article
Pixel Detector Belle II

Precise measurement of the unitarity triangle angle β

June 13, 2023

Led by the Dortmund working group, the LHCb collaboration unveiled a pivotal discovery at CERN today. Analyzing the full breadth of Run 2 data, they achieved unmatched precision in measuring the sin2β observable, crucial for determining the angle β of the 'unitarity triangle'.

The initial measurements of sin2β by the BaBar and Belle experiments were instrumental in the awarding of the 2008 Nobel Prize in Physics. Today's announcement, detailing LHCb researchers' value of S/sin2β=0.716±0.013±0.008, stands as the most accurate measurement of the unitarity angle β thus far, marking a significant stride in particle physics.

News Article

LHCb Exhibition Opens at CERN

March 3, 2023

On March 3, 2023, CERN unveiled a captivating LHCb exhibition at a special event attended by LHCb collaborators and the CERN Education, Communications, and Outreach team. Located in the surface experimental hall, the exhibition gives visitors an intimate look at the LHCb experiment, with features like an immersive audio-visual experience replicating the layout of LHCb, display of upgraded detector parts, and an interactive touch screen detailing particle physics fundamentals and LHCb collaboration. Developed in partnership with the design firm Indissoluble, this new attraction will be a major stop for the CERN visit service network, and upcoming tours will further benefit from the new Science Gateway launching this autumn.

LHCb News Article