Search for the pair production of light top squarks in the e(+/-)mu(-/+) final state in proton-proton collisions at root s=13 TeV



Sirunyan, AM, Tumasyan, A, Adam, W, Ambrogi, F, Asilar, E, Bergauer, T, Brandstetter, J, Dragicevic, M, Eroe, J, Del Valle, A Escalante
et al (show 2298 more authors) (2019) Search for the pair production of light top squarks in the e(+/-)mu(-/+) final state in proton-proton collisions at root s=13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2019 (3). 101-.

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Abstract

<jats:title>A<jats:sc>bstract</jats:sc> </jats:title> <jats:p>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<jats:sup>−1</jats:sup> of proton-proton collisions at a centre-of-mass energy of <jats:inline-formula> <jats:alternatives> <jats:tex-math>$$ \sqrt{s}=13 $$</jats:tex-math> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> </mml:math> </jats:alternatives> </jats:inline-formula> 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 <jats:italic>M</jats:italic> <jats:sub>T2</jats:sub> 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. </jats:p>

Item Type: Article
Uncontrolled Keywords: Hadron-Hadron scattering (experiments), Supersymmetry, top squark
Depositing User: Symplectic Admin
Date Deposited: 09 May 2019 10:35
Last Modified: 17 Mar 2024 03:29
DOI: 10.1007/JHEP03(2019)101
Open Access URL: http://10.0.3.239/JHEP03(2019)101
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3040423