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Search for standard model production of four top quarks in the lepton + jets channel in pp collisions at \( \sqrt{s}=8 \)TeV


CMS Collaboration; Canelli, M F; Chiochia, V; Kilminster, B; Robmann, P; et al (2014). Search for standard model production of four top quarks in the lepton + jets channel in pp collisions at \( \sqrt{s}=8 \)TeV. Journal of High Energy Physics:154.

Abstract

A search is presented for standard model (SM) production of four top quarks (tt⎯⎯tt⎯⎯) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb−1 recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. The expected cross section for SM tt⎯⎯tt⎯⎯ production is σSMtt⎯tt⎯≈1fb . A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background. The data are consistent with expectations of the SM, and an upper limit of 32 fb is set at a 95% confidence level on the cross section for producing four top quarks in the SM, where a limit of 32 ± 17 fb is expected.

Abstract

A search is presented for standard model (SM) production of four top quarks (tt⎯⎯tt⎯⎯) in pp collisions in the lepton + jets channel. The data correspond to an integrated luminosity of 19.6 fb−1 recorded at a centre-of-mass energy of 8 TeV with the CMS detector at the CERN LHC. The expected cross section for SM tt⎯⎯tt⎯⎯ production is σSMtt⎯tt⎯≈1fb . A combination of kinematic reconstruction and multivariate techniques is used to distinguish between the small signal and large background. The data are consistent with expectations of the SM, and an upper limit of 32 fb is set at a 95% confidence level on the cross section for producing four top quarks in the SM, where a limit of 32 ± 17 fb is expected.

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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:2014
Deposited On:24 Feb 2015 09:50
Last Modified:16 Oct 2017 07:34
Publisher:Springer
ISSN:1029-8479
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1007/JHEP11(2014)154

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