Search for lensing signatures from the latest fast radio burst observations and constraints on the abundance of primordial black holes

Understand

The possibility that primordial black holes (PBHs) form a part of dark matter has been considered for a long time but poorly constrained over a wide mass range.

• Fast radio bursts (FRBs) are bright radio transients with millisecond duration.
• Lensing effect of them has been proposed as one of the cleanest probes for constraining the presence of PBHs in the stellar mass window.
• In this paper, we first apply the normalised cross-correlation algorithm to search and identify candidates of lensed FRBs in the latest public FRB observations, i.e.