Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 101: Cosmic Ray 6
T 101.9: Vortrag
Donnerstag, 24. März 2022, 18:15–18:30, T-H33
Results from a Pilot Study on Measurement of Fragmentation of Intermediate Mass Nuclei with NA61/SHINE at CERN — •Neeraj Amin for the NA61/SHINE collaboration — Institute for Astroparticle Physics, Karlsruhe Institute of Technology, Karlsruhe, Germany
Cosmic-ray propagation in the Galaxy can be constrained by modeling the secondary-to-primary cosmic-ray flux ratios, like the Boron-to-Carbon flux ratio that reaches Earth. While these fluxes are currently measured with high precision (<5%) by space-based detectors like AMS-02 and CALET, insufficient knowledge of nuclear fragmentation cross sections hinders the precision with which we can constrain cosmic-ray propagation. Therefore, new laboratory measurements of fragmentation cross-sections above 10 A GeV/c are needed.
In this talk, we report on the analysis of pilot data on fragmentation taken in 2018 with the NA61/SHINE experimental facility at CERN with 12C projectiles at a pbeam = 13.5 A GeV/c. The main aim of this pilot run was to demonstrate the ability of NA61/SHINE to measure nuclear fragmentation cross sections in C+p interactions. Two fixed targets, polyethylene (C2H4) and graphite were used to achieve this. We present a preliminary measurement of Boron production in C+p interactions including the contribution from the short-lived ‘ghost nucleus’ 11C.