Search for (Anti-)nuclei in Cosmic Rays at AMS-02 and Study of Gluon Spin at PHENIX
Seminars
VBLHEP Specialized Seminar
A.M.Baldin Relativistic nuclear physics and polarization phenomena #781
Date and Time: Wednesday, 20 November 2019, at 11:00 AM
Venue: VBLHEP Conference Hall (bld. 3), the Veksler and Baldin Laboratory of High Energy Physics
Seminar topic: «Search for (Anti-)nuclei in Cosmic Rays at AMS-02 and Study of Gluon Spin at PHENIX»
Speaker: Amaresh Datta (Department of Physics and Astronomy, University of Hawai’i at Manoa, USA)
Abstract:
Antiparticles in the Cosmic Rays (CR) may be originated from the annihilation of Dark Matter (DM). GeV or sub-GeV anti-nuclei in CR can be the `smoking gun’ signature of the presence of DM. Using data from the AMS-02 detector, on board International Space Station (ISS), we search for (anti-)deuterons and also study the production of light (anti-)nuclei via coalescence mechanism using data from NA61/SHINE experiment.
Since the `Spin Crisis’, many experiments have been trying to probe gluon spin contribution to the proton spin. Using polarized p + p data recorded at the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC), we measured cross-sections and spin asymmetries and compared with perturbative QCD calculations to improve our knowledge of the gluon and sea-quark spin distribution inside nucleons.