# Corrections to the Higgs Mode Masses in Superfluid 3He

## TL;DR

This paper refines the theoretical understanding of Higgs mode masses in superfluid 3He by incorporating recent strong-coupling corrections, aligning experimental measurements with advanced models that include sub-dominant pairing effects.

## Contribution

It introduces strong-coupling corrections to Higgs mode mass calculations in superfluid 3He, improving agreement with experimental data.

## Key findings

- Strong-coupling effects significantly alter Higgs mass predictions.
- Experimental data aligns with models including sub-dominant $f$-wave pairing.
- Theoretical corrections resolve previous discrepancies between theory and experiment.

## Abstract

Superfluid 3He has a rich spectrum of collective modes with both massive and massless excitations. The masses of these modes can be precisely measured using acoustic spectroscopy and fit to theoretical models. Prior comparisons of the experimental results with theory did not include strong-coupling effects beyond the weak-coupling-plus BCS model, so-called non-trivial strong-coupling corrections. In this work we utilize recent strong-coupling calculations to determine the Higgs masses and find consistency between experiments that relate them to a sub-dominant $f$-wave pairing strength.