Speaker
Benjamin Doenigus
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Description
The excellent particle identification capabilities of the ALICE experiment allow the studies of (anti) matter and hyper-matter production. (Anti) deuterons, tritons, 3He and 4He as well as the corresponding antinuclei can be cleanly identified based on their specific energy loss in the Time Projection Chamber and velocity information in the Time-Of-Flight detector. The (anti) hyper-triton signal can be extracted from the study of its mesonic decay (3_lambda_H -> 3He + pion) via the topological identification of secondary vertices.
The (3He, pion) invariant mass spectrum will be shown, and the measurement of production yield will be provided. Transverse momentum (pt) spectra of (anti) nuclei along with their production yield and mean pt will be presented.
In addition to this, searches for even lighter hyper-matter systems, i.e. lambda-lambda and lambda-n bound states will be discussed. The results will also be compared with the expectations from the thermal and coalescence models.
Primary author
Collaboration ALICE
(CERN, Geneva, Switzerland)
Co-author
Benjamin Doenigus
(GSI - Helmholtzzentrum fur Schwerionenforschung GmbH (DE))
Peer reviewing
Paper
Paper files:
