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Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √‾= 13 TeV

Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √‾= 13 TeV
Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √‾= 13 TeV
A search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, Lorentz-boosted top quark. This study is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, in data recorded by the CMS detector in 2016 at the LHC, corresponding to an integrated luminosity of 36 fb−1. New substructure techniques, including the novel use of energy correlation functions, are utilized to identify the decay products of the top quark. With no significant deviations observed from predictions of the standard model, limits are placed on the production of new heavy bosons coupling to dark matter particles. For a scenario with purely vector-like or purely axial-vector-like flavor changing neutral currents, mediator masses between 0.20 and 1.75 TeV are excluded at 95% confidence level, given a sufficiently small dark matter mass. Scalar resonances decaying into a top quark and a dark matter fermion are excluded for masses below 3.4 TeV, assuming a dark matter mass of 100 GeV.
1029-8479
1-54
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3
The CMS Collaboration
Sirunyan, A.M.
846a7137-803d-49de-aae7-d6b85519e829
Tumasyan, A.
6e9fc82d-9104-48e4-8a4d-60f52fdb9ee5
Belyaev, A.
6bdb9638-5ff9-4b65-a8f2-34bae3ac34b3

Sirunyan, A.M., Tumasyan, A. and Belyaev, A. , The CMS Collaboration (2018) Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at √‾= 13 TeV. Journal of High Energy Physics, 2018 (27), 1-54. (doi:10.1007/JHEP06(2018)027).

Record type: Article

Abstract

A search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, Lorentz-boosted top quark. This study is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, in data recorded by the CMS detector in 2016 at the LHC, corresponding to an integrated luminosity of 36 fb−1. New substructure techniques, including the novel use of energy correlation functions, are utilized to identify the decay products of the top quark. With no significant deviations observed from predictions of the standard model, limits are placed on the production of new heavy bosons coupling to dark matter particles. For a scenario with purely vector-like or purely axial-vector-like flavor changing neutral currents, mediator masses between 0.20 and 1.75 TeV are excluded at 95% confidence level, given a sufficiently small dark matter mass. Scalar resonances decaying into a top quark and a dark matter fermion are excluded for masses below 3.4 TeV, assuming a dark matter mass of 100 GeV.

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More information

Accepted/In Press date: 1 May 2018
e-pub ahead of print date: 5 June 2018
Published date: June 2018

Identifiers

Local EPrints ID: 424663
URI: http://eprints.soton.ac.uk/id/eprint/424663
ISSN: 1029-8479
PURE UUID: cb55e731-eea2-444f-8670-47d4789d3a14
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

Catalogue record

Date deposited: 05 Oct 2018 11:39
Last modified: 26 Nov 2021 02:52

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Contributors

Author: A.M. Sirunyan
Author: A. Tumasyan
Author: A. Belyaev ORCID iD
Corporate Author: The CMS Collaboration

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