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Measurement of the tt¯ production cross section in the all-jet final state in pp collisions at s√=7 TeV


CMS Collaboration; Chatrchyan, S; Khachatryan, V; Sirunyan, A M; et al; Chiochia, V; Kilminster, B; Robmann, P (2013). Measurement of the tt¯ production cross section in the all-jet final state in pp collisions at s√=7 TeV. Journal of High Energy Physics, 05:65.

Abstract

A measurement is presented of the tt¯ production cross section (σtt¯) in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 fb−1, collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and tt¯ signal to the reconstructed mass spectrum of tt¯ candidates in the data, in which events are subjected to a kinematic fit assuming a tt¯→W+bW−b¯→6 jets hypothesis. The measurement yields σtt¯=139±10(stat.)±26(syst.)±3(lum.)pb , a result consistent with those obtained in other tt¯ decay channels, as well as with predictions of the standard model.

Abstract

A measurement is presented of the tt¯ production cross section (σtt¯) in proton-proton collisions at a centre-of-mass energy of 7 TeV, in the all-jet final state that contains at least six jets, two of which are tagged as originating from b quarks. The data correspond to an integrated luminosity of 3.54 fb−1, collected with the CMS detector at the LHC. The cross section is determined through an unbinned maximum likelihood fit of background and tt¯ signal to the reconstructed mass spectrum of tt¯ candidates in the data, in which events are subjected to a kinematic fit assuming a tt¯→W+bW−b¯→6 jets hypothesis. The measurement yields σtt¯=139±10(stat.)±26(syst.)±3(lum.)pb , a result consistent with those obtained in other tt¯ decay channels, as well as with predictions of the standard model.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:2013
Deposited On:14 Feb 2014 13:39
Last Modified:15 Dec 2017 04:01
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP05(2013)065

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