Measurement of the ttÂ¯ production cross section in the Ï„+jets channel in pp collisions at âˆšs=7 TeV

Serguei Chatrchyan; 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 J Eugster; Klaus Freudenreich; Christoph Grab; Dmitry Hits; Pierre Lecomte; Werner Lustermann; Andrea 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 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

doi:10.1140/epjc/s10052-013-2386-x

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Measurement of the ttÂ¯ production cross section in the Ï„+jets channel in pp collisions at âˆšs=7 TeV

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Measurement of the ttÂ¯ production cross section in the Ï„+jets channel in pp collisions at âˆšs=7 TeV

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

The European physical journal. C, Particles and fields, Vol.73(4), 2386

04/01/2013

DOI: 10.1140/epjc/s10052-013-2386-x

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Abstract

The top-quark pair production cross section in 7 TeV center-of-mass energy proton–proton collisions is measured using data collected by the CMS detector at the LHC. The measurement uses events with one jet identified as a hadronically decaying τ lepton and at least four additional energetic jets, at least one of which is identified as coming from a b quark. The analyzed data sample corresponds to an integrated luminosity of 3.9 fb−1 recorded by a dedicated multijet plus hadronically decaying τ trigger. A neural network has been developed to separate the top-quark pairs from the W+jets and multijet backgrounds. The measured value of σtt¯=152±12(stat.)±32(syst.)±3(lum.) pb is consistent with the standard model predictions.

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Nuclear Experiment

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Title: Subtitle: Measurement of the ttÂ¯ production cross section in the Ï„+jets channel in pp collisions at âˆšs=7 TeV
Creators: Serguei Chatrchyan - CERN
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 J Eugster
Klaus Freudenreich
Christoph Grab
Dmitry Hits
Pierre Lecomte
Werner Lustermann
Andrea 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 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
Contributors: Y Onel (Contributor) - University of Iowa, Physics and Astronomy
Resource Type: Journal article
Publication Details: The European physical journal. C, Particles and fields, Vol.73(4), 2386
DOI: 10.1140/epjc/s10052-013-2386-x
NLM abbreviation: Eur Phys J C Part Fields
ISSN: 1434-6044
eISSN: 1434-6052
Publisher: Springer
Language: English
Date published: 04/01/2013
Academic Unit: Physics and Astronomy
Record Identifier: 9984199843102771

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