# Measurement of the t t-bar production cross section using events with one lepton and at least one jet in pp collisions at sqrt(s) = 13 TeV

## TL;DR

This paper reports a measurement of the top-antitop quark pair production cross section at 13 TeV using CMS data, and determines the top quark mass from the cross section dependence.

## Contribution

It provides a new measurement of the t t-bar production cross section and top quark mass at 13 TeV with improved precision.

## Key findings

- Measured cross section: 888 pb with uncertainties
- Top quark mass: 170.6 GeV with uncertainties
- Results agree with Standard Model predictions

## Abstract

A measurement of the t t-bar production cross section at sqrt(s) = 13 TeV is presented using proton-proton collisions, corresponding to an integrated luminosity of 2.2 inverse femtobarns, collected with the CMS detector at the LHC. Final states with one isolated charged lepton (electron or muon) and at least one jet are selected and categorized according to the accompanying jet multiplicity. From a likelihood fit to the invariant mass distribution of the isolated lepton and a jet identified as coming from the hadronization of a bottom quark, the cross section is measured to be sigma(t t-bar) = 888 +/- 2 (stat) +26 -28 (syst) +/- 20 (lumi) pb, in agreement with the standard model prediction. Using the expected dependence of the cross section on the pole mass of the top quark (m[t]), the value of m[t] is found to be 170.6 +/- 2.7 GeV.