Single Top production at CMS

TL;DR

This paper reports the first measurement of the single top quark production cross section in the t channel at 7 TeV using CMS data, confirming the Standard Model prediction with two complementary analyses.

Contribution

It provides the first measurement of the single top t-channel cross section at 7 TeV with CMS, using two different analysis methods on early LHC data.

Findings

Measured cross section: 83.6 pb with uncertainties.

Results are consistent with Standard Model predictions.

Confirmed the Tevatron's observation of single top production.

Abstract

A first measurement of the cross section of single top quark production in the t channel in pp collision at sqrt(s)=7 TeV is presented. The measurement is performed on a data sample corresponding to an integrated luminosity of 35.9 pb^-1 recorded at the LHC with the CMS detector. Leptonic decay channels with an electron or a muon in the final state are considered. After a selection optimized for the t-channel mode, two different and complementary analyses have been performed. Both analyses confirm the Tevatron's observation of single top, and their combination measures a cross section of sigma = 83.6 +/- 29.8(stat.+syst.) +/- 3.3 (lumi.) pb, which is consistent with the Standard Model prediction.