Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector

Allison, Lee and Barton, Adam and Borissov, Guennadi and Bouhova-Thacker, Eva and Catmore, James and Chilingarov, Alexandre and Dearnaley, William and Fox, Harald and Grimm, Kathryn and Henderson, Robert and Hughes, Gareth and Jones, Roger William Lewis and Kartvelishvili, Vakhtang and Long, Robin and Love, Peter and Maddocks, Harvey and Smizanska, Maria and Walder, James (2014) Search for direct top-squark pair production in final states with two leptons in pp collisions at root s=8 TeV with the ATLAS detector. Journal of High Energy Physics, 2014 (6). ISSN 1029-8479

[img]
Preview
PDF (art%3A10.1007%2FJHEP06%282014%29124)
art_3A10.1007_2FJHEP06_282014_29124.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

A search is presented for direct top-squark pair production in final states with two leptons (electrons or muons) of opposite charge using 20.3 fb(-1) of pp collision data at root s = 8 TeV, collected by the ATLAS experiment at the Large Hadron Collider in 2012. No excess over the Standard Model expectation is found. The results are interpreted under the separate assumptions (i) that the top squark decays to a b-quark in addition to an on-shell chargino whose decay occurs via a real or virtual W boson, or (ii) that the top squark decays to a t-quark and the lightest neutralino. A top squark with a mass between 150 GeV and 445 GeV decaying to a b-quark and an on-shell chargino is excluded at 95% confidence level for a top squark mass equal to the chargino mass plus 10 GeV, in the case of a 1 GeV lightest neutralino. Top squarks with masses between 215 (90) GeV and 530 (170) GeV decaying to an on-shell (off-shell) t-quark and a neutralino are excluded at 95% confidence level for a 1 GeV neutralino.

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Additional Information:
JHEP is an open-access journal funded by SCOAP3 and licensed under CC BY 4.0 The original publication is available at www.link.springer.com
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
70443
Deposited By:
Deposited On:
18 Aug 2014 23:04
Refereed?:
Yes
Published?:
Published
Last Modified:
18 Sep 2020 01:57