NLO + parton-shower generator for Wc production in the POWHEG BOX RES

TL;DR

This paper introduces a next-to-leading-order plus parton-shower event generator for Wc production in proton-proton collisions, incorporating detailed effects and comparing results with CMS data at 13 TeV.

Contribution

The paper presents the first implementation of a NLO+PS generator for Wc production in the POWHEG BOX RES framework with comprehensive physical effects included.

Findings

Particle-level results match CMS data at 13 TeV.

Inclusion of off-shell, spin-correlation, and CKM effects improves accuracy.

Interfacing with Herwig7.2 and Pythia8.3 demonstrates versatility.

Abstract

We present the implementation of a next-to-leading-order plus parton-shower event generator for the hadronic production of a heavy charm quark accompanied by a leptonically-decaying $W$ boson in the POWHEG BOX RES framework. We consider both signatures, i.e. $pp\to c\, \ell^- \bar{\nu}_{\ell}$ and $pp\to \bar{c} \,\ell^+ {\nu}_{\ell}$, and we include exactly off-shell and spin-correlation effects, as well as off-diagonal Cabibbo-Kobayashi-Maskawa contributions. We present particle-level results, obtained interfacing our code with the Herwig7.2 and Pythia8.3 shower Monte Carlo event generators, including hadronization and underlying-event effects, and compare them against the data collected by the CMS Collaboration at $\sqrt{s}=13$ TeV.