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Searches for new physics using the tt¯ invariant mass distribution in pp collisions at s√=8  TeV


CMS Collaboration; Chatrchyan, S; Khachatryan, V; Sirunyan, A M; et al; Chiochia, V; Kilminster, B; Robmann, P (2013). Searches for new physics using the tt¯ invariant mass distribution in pp collisions at s√=8 TeV. Physical Review Letters, 111(21):211804.

Abstract

Searches for anomalous top quark-antiquark production are presented, based on pp collisions at s√=8  TeV. The data, corresponding to an integrated luminosity of 19.7  fb−1, were collected with the CMS detector at the LHC. The observed tt¯ invariant mass spectrum is found to be compatible with the standard model prediction. Limits on the production cross section times branching fraction probe, for the first time, a region of parameter space for certain models of new physics not yet constrained by precision measurements.

Abstract

Searches for anomalous top quark-antiquark production are presented, based on pp collisions at s√=8  TeV. The data, corresponding to an integrated luminosity of 19.7  fb−1, were collected with the CMS detector at the LHC. The observed tt¯ invariant mass spectrum is found to be compatible with the standard model prediction. Limits on the production cross section times branching fraction probe, for the first time, a region of parameter space for certain models of new physics not yet constrained by precision measurements.

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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:18 Feb 2014 14:04
Last Modified:05 Apr 2016 17:38
Publisher:American Physical Society
ISSN:0031-9007
Publisher DOI:https://doi.org/10.1103/PhysRevLett.111.211804
PubMed ID:24313480

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