Marino Missiroli | Searcharxiv

arXiv2026

Simulations and flavour-scheme studies for Higgs-boson production in association with charm quarks

We present a detailed NLO+PS study of Higgs-boson production in association with charm and bottom quarks, with particular focus on the modelling of the H+c final state. We systematically compare predictions in massive and massless flavour schemes, quantify scale and flavour-scheme uncertainties, and assess the impact of interference and loop-induced contributions. Special emphasis is placed on the Higgs production via charm Yukawa fusion, for which we compare NLO+PS predictions with a NNLO+PS calculation of $c\bar{c}H$ production in the four-flavour scheme at 13.6 TeV. Based on these results, we provide the first practical recommendations for the simulation of $c\bar{c}H$ production in LHC analyses.

hep-ph↗

arXiv2016

Searches for top-antitop quark resonances at $\sqrt{s}=13~\mathrm{TeV}$ with the CMS detector

We present the first results on searches for new massive resonances decaying to a top-antitop quark ($t\bar{t}$) pair with the CMS detector at the LHC in proton-proton collisions with a center of mass energy of $\sqrt{s}=13~\mathrm{TeV}$. The data set considered corresponds to an integrated luminosity of $2.6~\mathrm{fb}^{-1}$ recorded during the the first year of the LHC Run-2. Searches are performed by measuring the invariant mass distribution of the $t\bar{t}$ system in semileptonic and fully-hadronic final states. Dedicated techniques are used to identify the decay of highly-boosted top quarks in order to maximize the analyses' sensitivity for $t\bar{t}$ resonances with a mass above the TeV scale. No significant excess is observed in the data compared to the expected SM background and exclusion limits are set on the cross section of a $t\bar{t}$ resonance in various new physics scenarios.

hep-ex↗