Antihelium identification and antihypertriton observation with LHCb
Antihelium identification and antihypertriton observation with LHCb
- Event time: 4:00pm until 5:00pm
- Event date: 19th January 2024
- Speaker: Dr Gediminas Sarpis (School of Physics & Astronomy, University of Edinburgh)
- Location: Higgs Centre Seminar Room, Room 4305, James Clerk Maxwell Building (JCMB) (James Clerk Maxwell Building (JCMB)) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
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. 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.
About Experimental Particle Physics seminars
The experimental particle physics seminar series invites speakers from all over Europe to discuss the latest developments at the LHC, accelerator and non-accelerator based neutrino physics, hardware R&D and astroparticle physics. .