Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7  TeV

Serguei Chatrchyan; Felix Bachmair; Lukas Bäni; Pierluigi Bortignon; Marco A Buchmann; Bruno Casal Laraña; Nicolas Chanon; Amanda Deisher; Günther Dissertori; Michael Dittmar; Mauro Donegà; Marc Dünser; Philipp Eller; Jürg Eugster; Klaus Freudenreich; Christoph Grab; Dmitry Hits; Pierre Lecomte; Werner Lustermann; Andrea C Marini; Pablo Martinez Ruiz Del Arbol; Niklas Mohr; Filip Moortgat; Christoph Nägeli; Pascal Nef; Francesca Nessi-Tedaldi; Francesco Pandolfi; Luc Pape; Felicitas Pauss; Marco Peruzzi; Frédéric J Ronga; Marco Rossini; Leonardo Sala; Ann-Karin Sanchez; Andrey Starodumov; Benjamin Stieger; Maiko Takahashi; Ludwig Tauscher; Alessandro Thea; Konstantinos Theofilatos; Daniel Treille; Christina Urscheler; Rainer Wallny; Hannsjörg A Weber; Lukas Wehrli; CMS Collaboration

doi:10.1103/PhysRevLett.110.172002

Back

Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7 TeV

Journal article

Open access

Peer reviewed

Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7 TeV

Serguei Chatrchyan, Felix Bachmair, Lukas Bäni, Pierluigi Bortignon, Marco A Buchmann, Bruno Casal Laraña, Nicolas Chanon, Amanda Deisher, Günther Dissertori, Michael Dittmar, …

Physical review letters, Vol.110(17), 172002

04/01/2013

DOI: 10.1103/PhysRevLett.110.172002

Files and links (1)

url

https://doi.org/10.1103/PhysRevLett.110.172002View

Published (Version of record) Open Access

Abstract

The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at √s=7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity of 5.0 fb−1, recorded by the CMS detector at the LHC in 2011. The measurement is performed in two independent channels through a trilepton analysis of t¯tZ events and a same-sign dilepton analysis of t¯tV (V=W or Z) events. In the trilepton channel a direct measurement of the t¯tZ cross section σt¯tZ=0.28+0.14−0.11 (stat)+0.06−0.03 (syst) pb is obtained. In the dilepton channel a measurement of the t¯tV cross section yields σt¯tV=0.43+0.17−0.15 (stat)+0.09−0.07 (syst) pb. These measurements have a significance, respectively, of 3.3 and 3.0 standard deviations from the background hypotheses and are compatible, within uncertainties, with the corresponding next-to-leading order predictions of 0.137+0.012−0.016 and 0.306+0.031−0.053 pb. ISSN:0031-9007 ISSN:1079-7114

Details

Title: Subtitle: Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7 TeV
Creators: Serguei Chatrchyan
Felix Bachmair
Lukas Bäni
Pierluigi Bortignon
Marco A Buchmann
Bruno Casal Laraña
Nicolas Chanon
Amanda Deisher
Günther Dissertori
Michael Dittmar
Mauro Donegà
Marc Dünser
Philipp Eller
Jürg Eugster
Klaus Freudenreich
Christoph Grab
Dmitry Hits
Pierre Lecomte
Werner Lustermann
Andrea C Marini
Pablo Martinez Ruiz Del Arbol
Niklas Mohr
Filip Moortgat
Christoph Nägeli
Pascal Nef
Francesca Nessi-Tedaldi
Francesco Pandolfi
Luc Pape
Felicitas Pauss
Marco Peruzzi
Frédéric J Ronga
Marco Rossini
Leonardo Sala
Ann-Karin Sanchez
Andrey Starodumov
Benjamin Stieger
Maiko Takahashi
Ludwig Tauscher
Alessandro Thea
Konstantinos Theofilatos
Daniel Treille
Christina Urscheler
Rainer Wallny
Hannsjörg A Weber - RWTH Aachen University
Lukas Wehrli
CMS Collaboration
Contributors: Y Onel (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: Physical review letters, Vol.110(17), 172002
DOI: 10.1103/PhysRevLett.110.172002
ISSN: 0031-9007
eISSN: 1079-7114
Publisher: American Physical Society
Grant note: DOI: 10.13039/100000015, name: U.S. Department of Energy; DOI: 10.13039/100000001, name: National Science Foundation
Language: English
Date published: 04/01/2013
Academic Unit: Physics and Astronomy
Record Identifier: 9984199747702771

Metrics

8 Record Views

45 Times Cited - Web of Science