Project Overview

Project starts!

The project has officially started on October the 1st, and the first Warsaw-Bergen meeting was held.


Project description

In this project we shall pursue a number of conrete novel approaches and tasks, that in our opinion should bring us (as the whole research community) closer to the ultimate goal of finding the extension of the SM that will explain the puzzles of the early universe. The guiding principle for our choice of the objectives is the existing observational puzzles that Standard Model is not able to explain that is existence of Dark Matter, the need for additional source of CP violation to explain the observed matter-antimatter asymmetry and, considering the EW baryogenesis to be an interesting option, the characteristic of the EW phase transition.

Our identification of New Physics signatures of interest which structure our research programme in its experimental and theoretical aspects is A) Mono-jet signature, B) Mono-Higgs signature, C) Di-Higgs production, CP state of p p -> t tbar h and h -> tau+ tau-, D) Multi-jet signatures.

Team members:

  • Trygve Buanes
  • Bertrand Martin dit Latour
  • Zygmunt Lalak
  • Inaki Lara
  • Anna Lipniacka
  • Marek Olechowski
  • Stefan Pokorski
  • Krzysztof Rolbiecki
  • Janusz Rosiek
  • Kazuki Sakurai
  • Therese Berge Sjursen
  • Bjarne Stugu
  • Konrad Tywoniuk

Team expansion in 2021:

  • Amit Adhikary (Warsaw)
  • Ayuki Kamada (Warsaw)
  • Fotis Koutroulis (Warsaw)
  • Nikolai Fomin (Bergen)
  • Erlend Aakvaag (Bergen)

Team expansion in 2023:

  • Priyanka Lamba (Warsaw)
  • Rafał Masełek (Warsaw)
  • Marco Merchand (Warsaw)
  • Dibyakrupa Sahoo (Warsaw)
  • Jan Kalinowski (Warsaw)

We also collaborate with:

  1. the team members of the project led by Therese Sjursen at the Western Norway University of Applied Science: Use Artificial Intelligence to pinpoint Dark Matter at the LHC
    • post-doc Igor Slazek mentored by Therese Sjursen, Trygve Buanes and Bertrand Martin Dit Latour
    • PhD student: Aurora Grefsrud mentored by Therese Sjursen, Trygve Buanes, Anna Lipniacka
    • PhD student: Tarje Solberg Hillersoy mentored by Therese Sjursen, Bertrand Martin Dit Latour, Trygve Buanes.
  2. Norwegian Center for CERN Research (NorCC) This project employs team member Bertrand Martin Dit Latour and provides ATLAS Collaboration membership fee for all project members in Norway, both at the University of Bergen and at the Western Norway University of Applied Science.

Research objectives:

  1. Machine learning assisted mono-jet anlysis in search for Dark Matter and new electricaly neutral stable particles and its theoretical interpretation.
    [ K. Sakurai, B. M. dit Latour, I. Lara, K. Rolbiecki, M. Olechowski, S. Pokorski, T. Buanes, A. Lipniacka, K. Tywoniuk, R. Masełek]

  2. Discriminating theories by joint mono-jet and mono-Higgs analysis.
    [ K. Rolbiecki, T. B. Sjursen, I. Lara, J. Rosiek, T. Buanes, A. Lipniacka]

  3. Constraining the mechanism of the Electroweak Phase Transition by di-Higgs boson production, p p -> h h.
    [ M. Olechowski, A. Lipniacka, S. Pokorski, Z. Lalak, B. Stugu]

  4. Probing new sources of CP violation in the Higgs-fermion sector.
    [ J. Rosiek, B. Stugu, K. Rolbiecki, K. Sakurai, A. Lipniacka]

  5. Investigating the sphaleron and mini-black hole production at the LHC and its dependence on the mechanism of EWPT.
    [ S. Pokorski, T. Buanes, I. Lara, K. Sakurai, M. Olechowski, Z. Lalak, A. Lipniacka, K. Tywoniuk, R. Masełek]

In-person meetings

Warsaw meeting photo.

Our first joint conference was held at the University of Warsaw, Faculty of Physics, on 17-18 October 2022. Because of the COVID-19 global pandemic, the conference was the first time when both teams from Warsaw and Bergen could meet. During the event, progress in all 5 research objectives was discussed, as well as some other interesting topics. In total, 25 people participated, and 8 talks were given.

Bergen meeting photo.

The second time we met in-person was at the University of Bergen, Physics Department, on 14-15 June 2023. During the two days of the workshop, multiple talks were given, discussing the progress in realisation of the project tasks.

CERN meeting photo.

The third GRIEG meeting was held at the CERN, on 3rd April 2024. During the meeting final conclusions on each of the five tasks were formulated.

Meeting with Francois Englert.

The final GRIEG meeting was held at the University of Warsaw, on 23-25 April 2024. The event was combined with a ceremony of awarding Honoric Causa Doctorate to the Nobel Prize laureate Francois Englert. It was also an opportunity to discuss plans for the post-project collaboration between Norwegian and Polish scientists.

Some on-line meetings

full list available here

Throughout the project, we held multiple online meetings to discuss our progress and address any challenges encountered with our tasks. These meetings served as essential platforms for effective communication and problem-solving, ensuring the smooth execution of our project goals.

Three-body Entanglement in Particle Decays

Lecture by K. Sakurai on "Three-body Entanglement in Particle Decays" at GGI Workshop