Search for invisible particles produced in association with single-top-quarks in proton–proton collisions at √s=8 TeV with the ATLAS detector

, The ATLAS collaboration (2015) Search for invisible particles produced in association with single-top-quarks in proton–proton collisions at √s=8 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 75 (2). ISSN 1434-6044

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Abstract

A search for the production of single-top-quarks in association with missing energy is performed in proton–proton collisions at a centre-of-mass energy of s√=8 TeV with the ATLAS experiment at the large hadron collider using data collected in 2012, corresponding to an integrated luminosity of 20.3 fb−1. In this search, the W boson from the top quark is required to decay into an electron or a muon and a neutrino. No deviation from the standard model prediction is observed, and upper limits are set on the production cross-section for resonant and non-resonant production of an invisible exotic state in association with a right-handed top quark. In the case of resonant production, for a spin-0 resonance with a mass of 500 GeV, an effective coupling strength above 0.15 is excluded at 95% confidence level for the top quark and an invisible spin-1/2 state with mass between 0 and 100 GeV. In the case of non-resonant production, an effective coupling strength above 0.2 is excluded at 95% confidence level for the top quark and an invisible spin-1 state with mass between 0 and 657 GeV.

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Additional Information:
© CERN for the benefit of the ATLAS collaboration 2015. This article is published with open access at Springerlink.com
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
74391
Deposited By:
Deposited On:
18 Jun 2015 14:26
Refereed?:
Yes
Published?:
Published
Last Modified:
21 Oct 2020 03:22