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Search for natural supersymmetry in events with top quark pairs and photons in pp collisions at √‾s = 8 TeV

Search for natural supersymmetry in events with top quark pairs and photons in pp collisions at √‾s = 8 TeV
Search for natural supersymmetry in events with top quark pairs and photons in pp collisions at √‾s = 8 TeV
Results are presented from a search for natural gauge-mediated supersymmetry (SUSY) in a scenario in which the top squark is the lightest squark, the next-to-lightest SUSY particle is a bino-like neutralino, and the lightest SUSY particle is the gravitino. The strong production of top squark pairs can produce events with pairs of top quarks and neutralinos, with each bino-like neutralino decaying to a photon and a gravitino. The search is performed using a sample of pp collision data accumulated by the CMS experiment at √‾s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The final state consists of a lepton (electron or muon), jets, and one or two photons. The imbalance in transverse momentum in the events is compared with the expected spectrum from standard model processes. No excess event yield is observed beyond the expected background, and the result is interpreted in the context of a general model of gauge-mediated SUSY breaking that leads to exclusion of top squark masses below 650–730 GeV.
1029-8479
1-38
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. and Tumasyan, A. , The CMS Collaboration (2018) Search for natural supersymmetry in events with top quark pairs and photons in pp collisions at √‾s = 8 TeV. Journal of High Energy Physics, 2018 (167), 1-38. (doi:10.1007/JHEP03(2018)167).

Record type: Article

Abstract

Results are presented from a search for natural gauge-mediated supersymmetry (SUSY) in a scenario in which the top squark is the lightest squark, the next-to-lightest SUSY particle is a bino-like neutralino, and the lightest SUSY particle is the gravitino. The strong production of top squark pairs can produce events with pairs of top quarks and neutralinos, with each bino-like neutralino decaying to a photon and a gravitino. The search is performed using a sample of pp collision data accumulated by the CMS experiment at √‾s = 8 TeV, corresponding to an integrated luminosity of 19.7 fb−1. The final state consists of a lepton (electron or muon), jets, and one or two photons. The imbalance in transverse momentum in the events is compared with the expected spectrum from standard model processes. No excess event yield is observed beyond the expected background, and the result is interpreted in the context of a general model of gauge-mediated SUSY breaking that leads to exclusion of top squark masses below 650–730 GeV.

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Accepted/In Press date: 18 March 2018
e-pub ahead of print date: 27 March 2018
Published date: March 2018

Identifiers

Local EPrints ID: 424657
URI: http://eprints.soton.ac.uk/id/eprint/424657
ISSN: 1029-8479
PURE UUID: 0126399f-4105-4b2e-b0fa-dc17495711ab
ORCID for A. Belyaev: ORCID iD orcid.org/0000-0002-1733-4408

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Date deposited: 05 Oct 2018 11:39
Last modified: 07 Oct 2020 01:53

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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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