Karlsruhe 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 114: Standard model 4 (strong/QCD)
T 114.2: Talk
Friday, March 8, 2024, 09:15–09:30, Geb. 30.23: 2/0
Observation of antihelium and antihypertriton in pp collisions with LHCb — •Hendrik Jage, Dan Moise, Valery Zhukov, and Stefan Schael — I. Physikalisches Institut B, RWTH Aachen
The first observation at the LHCb experiment of hypertritons and antihypertritons is reported. The used dataset consists of pp collisions at √s = 13 TeV, collected between 2016 and 2018, and corresponds to an integrated luminosity of 5.5 fb−1. The hypertriton candidates are reconstructed via the two-body decay into helium-3 and a charged pion. The corresponding helium nuclei are identified with a technique that is innovative at the LHCb experiment and mainly exploits ionisation losses in the LHCb silicon sensors. A total of 1.1×105 prompt helium and antihelium candidates are identified with negligible background contamination and 107±11 hypertriton candidates are found, paving the way for a rich programme of precise measurements of QCD and astrophysical interest to be performed on the available data.
Keywords: Hypertriton; Helium; Particle Identification; LHCb