Measurement of the top quark pair production cross section in <em>pp</em> collisions at √s=7 TeV in dilepton final states with ATLAS

ATLAS Collaboration

doi:10.1016/j.physletb.2011.12.055

Scientific article

English

Measurement of the top quark pair production cross section in pp collisions at √s=7 TeV in dilepton final states with ATLAS

Contributors

ATLAS Collaboration

Published in

Physics letters. B, vol. 707, no. 5, p. 459-477

Publication date

2012

Abstract

A measurement of the production cross section of top quark pairs (tt) in proton–proton collisions at a center-of-mass energy of 7 TeV recorded with the ATLAS detector at the Large Hadron Collider is reported. Candidate events are selected in the dilepton topology with large missing transverse energy and at least two jets. Using a data sample corresponding to an integrated luminosity of 35 pb−1, a tt production cross section σtt=177±20(stat.)±14(syst.)±7(lum.) pb is measured for an assumed top quark mass of mt=172.5 GeV. A second measurement requiring at least one jet identified as coming from a b quark yields a comparable result, demonstrating that the dilepton final states are consistent with being accompanied by b-quark jets. These measurements are in good agreement with Standard Model predictions.

Keywords

Top physics
Heavy quark production
Total cross section

UNIGE affiliation entities

Faculté des sciences / Section de physique / Département de physique nucléaire et corpusculaire

Citation (ISO format)

ATLAS Collaboration. Measurement of the top quark pair production cross section in pp collisions at √s=7 TeV in dilepton final states with ATLAS. In: Physics letters. B, 2012, vol. 707, n° 5, p. 459–477. doi: 10.1016/j.physletb.2011.12.055

Article (Published version)

Identifiers

PID : unige:40824
DOI : 10.1016/j.physletb.2011.12.055

Additional URL for this publication

http://www.sciencedirect.com/science/article/pii/S0370269311015231#

Journal ISSN

0370-2693

612views

462downloads

Creation

10/10/2014 11:20:00

First validation

10/10/2014 11:20:00

Update

13/10/2025 22:20:44

Status update

14/03/2023 21:50:28

Last indexation

10/11/2026 17:10:07