$\mathcal{L}$-invariants, $p$-adic heights and factorization of $p$-adic $L$-functions

TL;DR

This paper investigates the non-critical exceptional zeros of Katz's $p$-adic $L$-functions for CM fields, redefining $ ext{L}$-invariants via $p$-adic heights and analyzing their role in the factorization of $p$-adic $L$-functions.

Contribution

It introduces a new group-ring-valued $ ext{L}$-invariant interpolated over $ ext{Z}_p$-extensions and extends factorization results for $p$-adic $L$-functions related to CM families.

Findings

Redefinition of $ ext{L}$-invariants using $p$-adic heights.

Interpolation of $ ext{L}$-invariants across $ ext{Z}_p$-extensions.

Extension of factorization theorems for $p$-adic $L$-functions.

Abstract

We continue with our study of the non-critical exceptional zeros of Katz' $p$-adic $L$-functions attached to a CM field $K$, following two threads. In the first thread, we redefine our (group-ring-valued) $\mathcal{L}$-invariant associated to each $\mathbb{Z}_{p}$-extension $K_{\Gamma}$ of $K$ in terms of $p$-adic height pairings and interpolate them as $K_{\Gamma}$ varies to a universal (multivariate) group-ring-valued $\mathcal{L}$-invariant. In the second thread, we use our results to study the exceptional zeros of the non-genuine Rankin--Selberg $p$-adic $L$-functions attached to the self-products of nearly ordinary CM families, via the factorization statements we establish. The factorization theorems are extensions of the results due to Greenberg and Palvannan.