Measurement of the inclusive $\mathrm{t}\overline{\mathrm{t}}$ cross section in pp collisions at $\sqrt{s} =$ 5.02 TeV using final states with at least one charged lepton

TL;DR

This paper reports the first measurement of the top quark pair production cross section in proton-proton collisions at 5.02 TeV, using CMS data with at least one charged lepton, confirming Standard Model predictions.

Contribution

It provides the first measurement of $ ext{t}ar{ ext{t}}$ cross section at 5.02 TeV and explores its implications for gluon distribution functions.

Findings

Measured cross section: 69.5 pb with 12% total uncertainty.

Result consistent with Standard Model expectations.

Implications for gluon distribution functions are analyzed.

Abstract

The top quark pair production cross section ($\sigma_{\mathrm{t}\overline{\mathrm{t}}}$) is measured for the first time in pp collisions at a center-of-mass energy of 5.02 TeV. The data were collected by the CMS experiment at the LHC and correspond to an integrated luminosity of 27.4 pb$^{-1}$. The measurement is performed by analyzing events with at least one charged lepton. The measured cross section is $ \sigma_{\mathrm{t}\overline{\mathrm{t}}} = 69.5 \pm 6.1$ (stat) $\pm 5.6$ (syst) $\pm 1.6$ (lumi) pb, with a total relative uncertainty of 12%. The result is in agreement with the expectation from the standard model. The impact of the presented measurement on the determination of the gluon distribution function is investigated.