Quark-gluon discrimination in the search for gluino pair production at the LHC

Bhattacherjee, Biplob and Mukhopadhyay, Satyanarayan and Nojiri, Mihoko M and Sakaki, Yasuhito and Webber, Bryan R (2017) Quark-gluon discrimination in the search for gluino pair production at the LHC. In: JOURNAL OF HIGH ENERGY PHYSICS (1).

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Abstract

We study the impact of including quark- and gluon-initiated jet discrimination in the search for strongly interacting supersymmetric particles at the LHC. Taking the example of gluino pair production, considerable improvement is observed in the LHC search reach on including the jet substructure observables to the standard kinematic variables within a multivariate analysis. In particular, quark and gluon jet separation has higher impact in the region of intermediate mass-gap between the gluino and the lightest neutralino, as the difference between the signal and the standard model background kinematic distributions is reduced in this region. We also compare the predictions from different Monte Carlo event generators to estimate the uncertainty originating from the modelling of the parton shower and hadronization processes.

Item Type:	Journal Article
Publication:	JOURNAL OF HIGH ENERGY PHYSICS
Publisher:	SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	08 Mar 2017 09:08
Last Modified:	08 Mar 2017 09:08
URI:	http://eprints.iisc.ac.in/id/eprint/56288

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