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Search for the pair production of light top squarks in the e±μ∓ final state in proton-proton collisions at s√=13 TeV

Search for the pair production of light top squarks in the e±μ∓ final state in proton-proton collisions at s√=13 TeV
Search for the pair production of light top squarks in the e±μ∓ final state in proton-proton collisions at s√=13 TeV
A search for the production of a pair of top squarks at the LHC is presented. This search targets a region of parameter space where the kinematics of top squark pair production and top quark pair production are very similar, because of the mass difference between the top squark and the neutralino being close to the top quark mass. The search is performed with 35.9 fb−1 of proton-proton collisions at a centre-of-mass energy of s√=13 TeV, collected by the CMS detector in 2016, using events containing one electron-muon pair with opposite charge. The search is based on a precise estimate of the top quark pair background, and the use of the MT2 variable, which combines the transverse mass of each lepton and the missing transverse momentum. No excess of events is found over the standard model predictions. Exclusion limits are placed at 95% confidence level on the production of top squarks up to masses of 208 GeV for models with a mass difference between the top squark and the lightest neutralino close to that of the top quark.
10.1007%2FJHEP03(2019)101
1029-8479
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Adam, W.
cf28e097-e876-491a-b325-652e123da3c0
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Adam, W.
cf28e097-e876-491a-b325-652e123da3c0
Belyaev, Alexander
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

The CMS Collaboration (2019) Search for the pair production of light top squarks in the e±μ∓ final state in proton-proton collisions at s√=13 TeV. Journal of High Energy Physics. (doi:10.1007%2FJHEP03(2019)101).

Record type: Article

Abstract

A search for the production of a pair of top squarks at the LHC is presented. This search targets a region of parameter space where the kinematics of top squark pair production and top quark pair production are very similar, because of the mass difference between the top squark and the neutralino being close to the top quark mass. The search is performed with 35.9 fb−1 of proton-proton collisions at a centre-of-mass energy of s√=13 TeV, collected by the CMS detector in 2016, using events containing one electron-muon pair with opposite charge. The search is based on a precise estimate of the top quark pair background, and the use of the MT2 variable, which combines the transverse mass of each lepton and the missing transverse momentum. No excess of events is found over the standard model predictions. Exclusion limits are placed at 95% confidence level on the production of top squarks up to masses of 208 GeV for models with a mass difference between the top squark and the lightest neutralino close to that of the top quark.

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e-pub ahead of print date: 18 March 2019

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Local EPrints ID: 430154
URI: http://eprints.soton.ac.uk/id/eprint/430154
ISSN: 1029-8479
PURE UUID: 8114d9dc-efa8-4063-8fd3-36d1f201e47f
ORCID for Alexander Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 15 Apr 2019 16:30
Last modified: 23 May 2020 00:30

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Contributors

Author: A.M. Sirunyan
Author: A. Tumasyan
Author: W. Adam
Corporate Author: The CMS Collaboration

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