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From the LHC to the Cosmos: recent anti-matter measurements with impact for astrophysics
Speaker Speaker: Dr Bellini Francesca (CERN)
Affiliato Affiliato: CERN
Data Evento Giovedì 02 Maggio , alle ore 15:30 - Aula Seminari - Dipartimento di Fisica
Abstract. The Large Hadron Collider can be used as “anti-matter factory”: in proton-proton, proton-nucleus
and nucleus-nucleus collisions at the TeV collision energy scale, light nuclei and their antimatter
counterparts are produced in equal amounts for a given species. In addition to providing unique information
to characterise the system produced in high-energy collisions, accelerator data on anti-nuclei production
can be used to constrain production models such as coalescence, with implications for cosmic ray physics
and indirect dark matter searches. In recent years, the observation of anti-deuteron and anti-helium in
cosmic rays has been suggested as a smoking gun in indirect searches for Dark Matter in the Galaxy, under
the hypothesis that the background from secondary astrophysical production is negligible. Constraining
predictions for the secondary cosmic-ray flux of anti-helium and anti-deuteron with data is therefore crucial
to the experimental searches. The most recent LHC results on anti-matter production, including antiprotons,
d, 3 He and 4 He, will be presented as well as the perspectives for future measurements during the high-
luminosity phase of the LHC (2021-2029).