Constraining new resonant physics with top spin polarisation information

Englert, C. , Ferrando, J. and Nordstrom, K. (2017) Constraining new resonant physics with top spin polarisation information. European Physical Journal C, 77, 407. (doi: 10.1140/epjc/s10052-017-4964-9)

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We provide a comprehensive analysis of the power of including top quark-polarisation information to kinematically challenging top pair resonance searches, for which ATLAS and CMS start losing sensitivity. Following the general modeling and analysis strategies pur- sued by the experiments, we analyse the semi-leptonic and the di-lepton channels and show that including po-larisation information can lead to large improvements in the limit setting procedures with large data sets. This will allow us to set stronger limits for parameter choices where sensitivity from the invariant mass of the top pair is not sufficient. This highlights the importance of spin observables as part of a more comprehensive set of ob-servables to gain sensitivity to BSM resonance searches.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Ferrando, Dr James and Englert, Professor Christoph and Nordstrom, Mr Karl
Authors: Englert, C., Ferrando, J., and Nordstrom, K.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:European Physical Journal C
ISSN (Online):1434-6052
Published Online:17 June 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in European Physical Journal C 77:407
Publisher Policy:Reproduced under a Creative Commons License

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