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|a Apyan, Aram
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|a Massachusetts Institute of Technology. Department of Physics
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|a Massachusetts Institute of Technology. Laboratory for Nuclear Science
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|a Ralph, Duncan Kelley
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|a Roland, Christof E
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|a Luckey Jr, P David
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|a Marini, Andrea Carlo
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|a McGinn, Christopher Francis
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|a Mironov, Camelia Maria
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|a Narayanan, Siddharth Madhavan
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|a Niu, Xinmei
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|a Paus, Christoph M. E.
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|a Ralph, Duncan Kelley
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|a Roland, Christof E
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|a Roland, Gunther M
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|a Salfeld-Nebgen, Jakob Maxillian Henry
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|a Stephans, George S. F.
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|a Sumorok, Konstanty C
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|a Varma, Mukund Madhav
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|a Velicanu, Dragos Alexandru
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|a Veverka, Jan
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|a Wang, J.
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|a Wang, Ta-Wei
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|a Wyslouch, Boleslaw
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|a Yang, Mingming
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|a Wyslouch, Victoria
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|a Measurement of top quark polarisation in t-channel single top quark production
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|b Springer-Verlag/SISSA,
|c 2017-02-07T17:04:45Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/106884
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|a A first measurement of the top quark spin asymmetry, sensitive to the top quark polarisation, in t-channel single top quark production is presented. It is based on a sample of pp collisions at a centre-of-mass energy of 8 TeV corresponding to an integrated luminosity of 19.7 fb[superscript −1]. A high-purity sample of t-channel single top quark events with an isolated muon is selected. Signal and background components are estimated using a fit to data. A differential cross section measurement, corrected for detector effects, of an angular observable sensitive to the top quark polarisation is performed. The differential distribution is used to extract a top quark spin asymmetry of 0.26 ± 0.03(stat) ± 0.10(syst), which is compatible with a p-value of 4.6% with the standard model prediction of 0.44.
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|a United States. Dept. of Energy
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|a National Science Foundation (U.S.)
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|a en_US
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|a Article
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|t Journal of High Energy Physics
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