arXiv subjects

Giacomo Ruisi

Publications and source records attributed to Giacomo Ruisi.

3 recordsLinked to original sources

arXiv2026

Higgs Boson plus Quark Pair Production at High Energies as di-Higgs Background

We investigate the impact of high-energy QCD resummation on Higgs-boson production processes relevant for Higgs-pair studies at the Large Hadron Collider. We present the first dedicated study of Higgs boson production in association with a bottom-quark pair and two additional hard jets in the gluon-fusion channel at high energies as a background to vector-boson-fusion Higgs-pair production. The resummation can significantly modify the QCD contribution in VBF-like regions of phase space, indicating that fixed-order calculations overestimate the contamination from gluon-fusion backgrounds. We then extend existing High Energy Jets (HEJ) predictions for Higgs boson production in association with jets by including quark-pair resummation effects for the first time.

hep-ph↗

arXiv2025

Stable perturbative predictions for isolated photon production with a jet pair at large $m_{j_1 j_2}$

We present the first calculation of the high-energy corrections to the process of isolated photon production in association with two jets. These corrections both stabilise the perturbative behaviour in $m_{j_1j_2}$ and lead to a significantly improved description of data from a recent ATLAS measurement.

hep-ph↗

arXiv2025

$e^+ e^- \to μ^+ μ^-$ in the Asymptotically Safe Standard Model

We study the electron-positron to muon--anti-muon cross-section in the asymptotically safe Standard Model. In particular, we include the graviton contributions to the scattering amplitude, which is computed from momentum-dependent timelike one-particle-irreducible correlation functions. Specifically, we employ reconstruction techniques for the graviton spectral functions. We find that the full asymptotically safe quantum cross section decreases in the ultraviolet with the centre-of-mass energy, and is compatible with unitarity bounds. Importantly, our findings provide non-trivial evidence for the unitarity of the asymptotically safe Standard Model.

hep-ph↗