# H+1 jet production revisited

## TL;DR

This paper revisits NNLO calculations for Higgs plus one jet production, comparing jettiness slicing with subtraction methods, highlighting improvements and remaining power corrections, especially at high transverse momentum.

## Contribution

It provides a detailed comparison of jettiness slicing and subtraction methods for NNLO Higgs+jet calculations, introducing an improved jettiness definition to reduce power corrections.

## Key findings

- Jettiness slicing results agree with subtraction methods at benchmark points.
- Boosted 1-jettiness definition improves performance.
- Power corrections are significant but reduced at high transverse momentum.

## Abstract

We revisit the next-to-next-to-leading order (NNLO) calculation of the Higgs boson+1~jet production process, calculated in the $m_t \to \infty$ effective field theory. We perform a detailed comparison of the result calculated using the jettiness slicing method, with published results obtained using subtraction methods. The results of the jettiness calculation agree with the two previous subtraction calculations at benchmark points. The performance of the jettiness slicing approach is greatly improved by adopting a definition of 1-jettiness that accounts for the boost of the Born system. Nevertheless, the results demonstrate that power corrections in the jettiness slicing method remain significant. At large transverse momentum the effect of power corrections is much reduced, as expected.