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Determining the quantum numbers of simplified models in tt¯X production at the LHC.

Dolan, Matthew J. and Spannowsky, Michael and Wang, Qi and Yu, Zhao-Huan (2016) 'Determining the quantum numbers of simplified models in tt¯X production at the LHC.', Physical review D., 94 (1). 015025.


Simplified models provide an avenue for characterizing and exploring new physics for large classes of UV theories. In this article we study the ability of the LHC to probe the spin and parity quantum numbers of a new light resonance X which couples predominantly to the third generation quarks in a variety of simplified models through the t¯tX channel. After evaluating the LHC discovery potential for X, we suggest several kinematic variables sensitive to the spin and CP properties of the new resonance. We show how an analysis exploiting differential distributions in the semileptonic channel can discriminate among various possibilities. We find that the potential to discriminate a scalar from a pseudoscalar or (axial) vector to be particularly promising.

Item Type:Article
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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review D 94, 015025 © (2016) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:13 June 2016
Date deposited:26 January 2017
Date of first online publication:21 July 2016
Date first made open access:26 January 2017

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