Supercuspidal L-packets via isocrystals

Abstract

In a recent paper, DeBacker and Reeder construct and parameterize L-packets on pure inner forms of unramified p-adic groups, that consist of depth zero supercuspidal representations. We generalize their work to non-pure inner forms, by providing an alternative construction based on the theory of isocrystals with additional structure due to Kottwitz. Furthermore, we show the stability and endoscopic transfer for these L-packets.

26 pages. Revisions in section 3: exposition focused on depth-zero L-packets, proofs streamlined, restrictions on the residual characteristic relaxed to p>2