Non-basic rigid packets for discrete $L$-parameters

Abstract

This article initiates the study of non-basic rigid inner forms over $p$-adic local fields, extending the basic theory developed by Kaletha. Motivated by the recent work of Bertoloni Meli--Oi on the $B(G)$-parametrization of the local Langlands conjectures, our main application is to extend the basic rigid refined local Langlands conjectures for a discrete $L$-parameter $\ddot{I}•$ of a quasi-split connected reductive group $G$. The packets of our extended construction are Weyl orbits of representations of inner forms of twisted Levi subgroups $N$ of $G$ for which $\ddot{I}•$ factors through a member of the canonical $L$-embeddings ${}^L{N}_{\pm }\to {}^{L}G$ constructed by Kaletha.

v2: submitted version, substantial revisions throughout including corrected and simplified definition of non-basic enhancements. 41 pages