June 27, 2022 to July 2, 2022
University of Ioannina (GR)
Europe/Athens timezone

Searches for baryon number violation in free neutron transformations at the European Spallation Source

Jul 1, 2022, 6:20 PM
Main Auditorium (Conference Centre “Karolos Papoulias”)

Main Auditorium

Conference Centre “Karolos Papoulias”


Bernhard Meirose (Stockholms Universitet)


Baryogenesis, the process that is theorised to have happened in the beginning of the Universe which produced the observed baryonic asymmetry, remains one of the most fundamental problems in physics. Baryon number violation (BNV) is ordinarily required for baryogenesis, but so far, all searches for it came back negative. The HIBEAM/NNBAR program is a two stage set of experiments (HIBEAM then NNBAR) to search for BNV-only processes: neutron conversions to sterile neutrons and antineutrons, using free neutrons. Due to the enormous advances in neutron reflectometry and high intensity of neutrons that will be available at the European Spallation Source, Sweden, where the measurements are to take place, the searches can achieve unprecedented sensitivity, surpassing the last search by three orders of magnitude. In this talk I will give an overview of the current stage of the experiment showing the fast progress that has been achieved, in particular in the last two years, in all areas of the experimental program.

Primary author

Bernhard Meirose (Stockholms Universitet)

Presentation materials