# Higgs Couplings without the Higgs

## TL;DR

This paper proposes a new approach to studying Higgs couplings by analyzing high-energy, off-shell processes involving longitudinal vector bosons, offering a complementary method to traditional on-shell measurements for precision tests of the Standard Model.

## Contribution

It introduces a novel high-energy, off-shell analysis method for Higgs couplings, expanding the tools for precision tests beyond on-shell measurements.

## Key findings

- High-energy effects reveal modifications in Higgs couplings.
- Off-shell channels are competitive with on-shell measurements.
- Opportunities for future refinements in Higgs coupling studies.

## Abstract

The measurement of Higgs couplings constitute an important part of present Standard Model precision tests at colliders. In this article, we show that modifications of Higgs couplings induce energy-growing effects in specific amplitudes involving longitudinally polarized vector bosons, and we initiate a novel program to study these very modifications of Higgs couplings off-shell and at high-energy, rather than on the Higgs resonance. Our analysis suggests that these channels are complementary and, at times, competitive with familiar on-shell measurements; moreover these high-energy probes offer endless opportunities for refinements and improvements.