(Hyper-)nuclei and exotica production measured with ALICE at the LHC

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Trogolo, Stefano^1

Dipartimento di Fisica, Università degli Studi di Torino, Via P. Giuria 1, Torino

10125, Italy^1

关键词: Collision energies;    Elliptic flows;    Light nuclei;    Particle identifications;    Production mechanisms;    Time projection chambers;    Time-of-flight detectors;    Transverse momenta;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012061/pdf
DOI  :  10.1088/1742-6596/832/1/012061

来源: IOP

【 摘 要 】

The high collision energies reached at the LHC open the possibility to study extensively the production of light (anti-)(hyper-)nuclei and exotic bound states in proton-proton (pp), proton-lead (p-Pb) and lead-lead (Pb-Pb) collisions. ALICE has excellent particle identification (PID) capability which allows the detection of these rarely produced particles. PID is perfomed using several techniques, namely by exploiting the measurement of the specific ionization energy loss in the Time Projection Chamber (TPC) and the information of the Time-Of-Flight (TOF) detector. The transverse momentum spectra and the yields (dN/dy) of light nuclei and anti-nuclei were obtained and results are discussed here, and the first measurement of deuteron elliptic flow is presented. Furthermore, the study of the production of (anti-)hypertriton and the status of the searches for exotic bound states, i.e. Λ-Λ and Λ-n, are discussed. Results are compared to predictions from thermal and coalescence models in order to enquire into the production mechanisms of nuclei, hypernuclei and exotic bound states.