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2024. 02. 20 -

Particle Physics and LHCb Detector at CERN: Observation of Hypermatter

Dr. Gediminas Šarpis. Photo from personal archive
The seminar will be held by Dr. Gediminas Šarpis, Postdoctoral Researcher at the University of Edinburgh, LHCb Outreach Convener.
The production of helium and anti-helium nuclei is studied for the first time with the LHCb detector in pp collisions at √s =13 TeV. The used dataset was collected between the years 2016 to 2018 and corresponds to an integrated luminosity of L = 5.5 fb^-1. The helium nuclei are identified using ionization losses in the silicon sensors of the VELO and ST detectors, alongside timing measurements in the OT drift tubes. A total of 10^5 prompt helium and anti-helium are identified with negligible background contamination.
First application of this method is the reconstruction of hypertritons via the 2-body decay into Helium-3 and a charged pion. A total of 10^2 hypertriton candidates are found. This example proves the feasibility of a rich program of measurements of QCD and astrophysics interest involving light nuclei.

Date and time: 20 February, 16:00

Location: A101 Conference Room, Saulėtekio al. 3.