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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/30475

Title: Model-independent measurement of the top quark polarisation
Authors: Aguilar-Saavedra, Juan Antonio
Herrero-Hahn, R. V.
Issue Date: 2013
Abstract: We introduce a new asymmetry in the decay t -> W b -> l nu b, which is shown to be directly proportional to the polarisation of the top quark along a chosen axis, times a sum of W helicity fractions. The latter have already been precisely measured at the Tevatron and the Large Hadron Collider. Therefore, this new asymmetry can be used to obtain a model-independent measurement of the polarisation of top quarks produced in any process at hadron or lepton colliders.
Sponsorship: This work has been supported by MICINN by projects FPA2006-05294 and FPA2010-17915, Junta de Andalucía (FQM 101, FQM 03048 and FQM 6552) and Fundação para a Ciência e Tecnologia (FCT) project CERN/FP/123619/2011.
Publisher: Elsevier
Keywords: Top quark
Polarisation
URI: http://hdl.handle.net/10481/30475
ISSN: 0370-2693
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Aguilar-Saavedra, J.A.; Herrero-Hahn, R.V. Model-independent measurement of the top quark polarisation. Physics Letters B, 718(3): 983-987 (2013). [http://hdl.handle.net/10481/30475]
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