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

Bhattacherjee, Biplob; Mukhopadhyay, Satyanarayan; Nojiri, Mihoko M.; Sakaki, Yasuhito; Webber, Bryan R.

doi:10.1007/JHEP01(2017)044

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

Journal Article · Wed Jan 11 00:00:00 EST 2017 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/JHEP01(2017)044· OSTI ID:1346819

Bhattacherjee, Biplob ^[1]; Mukhopadhyay, Satyanarayan ^[2]; Nojiri, Mihoko M. ^[3]; Sakaki, Yasuhito ^[4]; Webber, Bryan R. ^[5]

Indian Institute of Science, Bangalore (India)
Univ. of Pittsburgh, Pittsburgh, PA (United States)
The Univ. of Tokyo, Kashiwa (Japan); KEK Theory Center and Sokendai, Tsukuba (Japan)
Korea Advanced Institute of Science and Technology, Yuseong-gu (Republic of Korea)
Cavendish Lab., Cambridge (United Kingdom)

Here, 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.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-95ER40896

OSTI ID:: 1346819

Journal Information:: Journal of High Energy Physics (Online), Vol. 2017, Issue 1; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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