ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider

G. Aad, B. Abbott, J. Abdallah, O. Abdinov, R. Aben, M. Abolins, O. S. AbouZeid, H. Abramowicz, H. Abreu, R. Abreu, Y. Abulaiti, B. S. Acharya, L. Adamczyk, D. L. Adams, J. Adelman, S. Adomeit, T. Adye, A. A. Affolder, T. Agatonovic-Jovin, J. AgricolaJ. A. Aguilar-Saavedra, S. P. Ahlen, F. Ahmadov, G. Aielli, H. Akerstedt, T. P. A. Åkesson, A. V. Akimov, G. L. Alberghi, J. Albert, S. Albrand, M. J. Alconada Verzini, M. Aleksa, I. N. Aleksandrov, C. Alexa, G. Alexander, T. Alexopoulos, M. Alhroob, G. Alimonti, L. Alio, J. Alison, S. P. Alkire, B. M. M. Allbrooke, P. P. Allport, A. Aloisio, Alejandro Alonso Diaz, Geert-Jan Besjes, Mogens Dam, Gorm Aske Gram Krohn Galster, Jørgen Beck Hansen, Jørn Dines Hansen, Peter Henrik Hansen, Morten Dam Jørgensen, Ask Emil Løvschall-Jensen, James William Monk, Simon Stark Mortensen, Lars Egholm Pedersen, Troels Christian Petersen, Almut Maria Pingel, Graig Wiglesworth, Stefania Xella

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Abstract

This paper reviews and extends searches for the direct pair production of the scalar supersymmetric partners of the top and bottom quarks in proton–proton collisions collected by the ATLAS collaboration during the LHC Run 1. Most of the analyses use 20 fb−1of collisions at a centre-of-mass energy of √s = 8 TeV, although in some case an additional 4.7 fb−1of collision data at √s = 7 TeV are used. New analyses are introduced to improve the sensitivity to specific regions of the model parameter space. Since no evidence of third-generation squarks is found, exclusion limits are derived by combining several analyses and are presented in both a simplified model framework, assuming simple decay chains, as well as within the context of more elaborate phenomenological supersymmetric models.

OriginalsprogEngelsk
Artikelnummer510
TidsskriftThe European Physical Journal C: Particles and Fields
Vol/bind75
Antal sider48
ISSN1434-6044
DOI
StatusUdgivet - 1 okt. 2015

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