Ulrik Egede


Accepting PhD Students

PhD projects

Title: Searching for CP violation in electroweak penguin decays Data analysis has in recent years shown up a number of surprising measurements in the decays of b-hadrons with leptons in the final state. The so-called electroweak penguin decays are very sensitive to as-yet undiscovered new heavy particles and the measurements might be the sign of the next break-through in particle physics. A new method of analysing the data (Eur.Phys.J. C78 (2018) 453, https://inspirehep.net/record/1623024), has a very large sensitivity to CP violation that has not yet been explored. In the project, you will analyse data from the LHCb experiment at the Large Hadron Collider. Advanced computational techniques involving multi-threading, machine learning and multi-dimensional optimisation will be tools that you will become familiar with. Travel to CERN in Geneva will also be a part of the PhD. ================ Title: Artificial Intelligence algorithms for real-time processing at the Large Hadron Collider The LHCb experiment located at the Large Hadron Collider has been an incredibly successful. It has in recent years revealed hints for that the Standard Model of particle physics might not describe all phenomena. In particular there are signs that we do not have what is called lepton universality and that muons and electrons might behave differently. In order to understand this better, the LHCb experiment will go through a set of upgrades that will increase the available data by 2 orders of magnitude. The data processing requirements for this is a challenge that does not yet have a solution. In the project you will investigate how Artificial Intelligence algorithms might be implemented in Field Programmable Gate Arrays (FPGAs) that form the boundary between software and hardware. In particular you will look at how the data coming from an upgraded calorimeter can be translated into energies and arrival times of electrons in real-time at a processing rate of 40 MHz. Travel to CERN in Geneva will also be a part of the PhD.


Research activity per year

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Personal profile

Research interests

  • Experimental High Energy Physics
  • Search for phenomena not described by the Standard Model of particle physics
  • Application of artificial intelligence in real-time processing and data selection
  • Development of Big Data processing tools
  • Phenomenology of electroweak penguin decays
  • Analysis of lepton non-universality in the decays of b-hadrons
  • Detector developments for upgrades of the LHCb detector

Supervision interests

  • Data analysis using data from the LHCb experiment
  • Detector upgrades for the future pf particle physics
  • Machine learning for real time data processing


My full publication list can be found at https://inspirehep.net/author/profile/U.Egede.1. My h-index as taken from Inspire is 110. My most important publications are given below

  1. LHCb collaboration, Determination of the quark coupling strength |V ub | using baryonic decays, Nature Phys. 11 (2015) 743, arXiv:1504.01568. 97 citations. This paper arose from discussions with theorists in 2012. By developing new techniques for reconstruction of semileptonic decays and working in close collaboration with the leader of the associated Lattice QCD calculation a world leading measurement of |V ub | was made with completely different systematic effects compared to the existing ones.
  2. U. Egede, T. Hurth, J. Matias, M. Ramon, and W. Reece, On the new physics reach of the decay mode B 0 → K ∗0 ` + ` − , JHEP 11 (2008) 032, arXiv:0807.2589 220 citations. In collaboration with theorists from CERN and Barcelona, I led an effort on new methods for extracting Wilson Coefficients in the B 0 → K ∗0 μ + μ − decay. The paper was important to this area as it for the first time made a systematic evaluation of how to combine theoretical and experimental information in the most optimal way to further the understanding of how contributions to physics beyond the Standard Model might affect the decay.
  3. U. Egede, T. Hurth, J. Matias, M. Ramon, and W. Reece, New observables in the decay mode B 0 → K ∗0 ` + ` − , JHEP 10 (2010) 032, arXiv:1005.0571 122 citations. In this paper we identified analytically the symmetries in the angular distribution that are fundamental for any derivation of new observables in the decay. This also paved the way for any analysis that is unbinned in q2 such as the B + → K + μ + μ − analysis below.
  4. LHCb collaboration, Differential branching fraction and angular analysis of the decay B 0 → K ∗0 μ + μ − , JHEP 08 (2013), 131, arXiv:1304.6325 218 citations. The measurement of the angular B 0 → K ∗0 μ + μ − with the full dataset collected from the LHC in 2011 was a major milestone for the analysis of Flavour Changing Neutral Current decays. The paper was the first analysis to measure the zero crossing point in the forward-backward asymmetry and prepared the ground for precision measurements in this decay.
  5. LHCb collaboration, Measurement of the phase difference between short- and long-distance amplitudes in the B+→ K + μ + μ − decay, EPJ C77 (2017), 161, arXiv:1612.06764 30 citations. The potential signs for New Physics in electroweak penguin decays relies on an understanding of the QCD effects induced by charm loops. This paper is the first one to show that the effect in the B + → K + μ + μ − are minimal and that this can’t explain that the branching fraction is below the SM expectation in this decay.


Education/Academic qualification

Experimental High Energy Physics, PhD, Lund Universitet (Lund University)

Award Date: 19 Jan 1998

Research area keywords

  • Particle Physics
  • Machine Learning
  • Hardware Implementation of Neural Networks


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