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

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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Indian Institute of Science, Bangalore (India)
  2. Univ. of Pittsburgh, Pittsburgh, PA (United States)
  3. The Univ. of Tokyo, Kashiwa (Japan); KEK Theory Center and Sokendai, Tsukuba (Japan)
  4. Korea Advanced Institute of Science and Technology, Yuseong-gu (Republic of Korea)
  5. Cavendish Lab., Cambridge (United Kingdom)
Publication Date:
Grant/Contract Number:
FG02-95ER40896
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; jets; supersymmetry phenomenology
OSTI Identifier:
1346819

Bhattacherjee, Biplob, Mukhopadhyay, Satyanarayan, Nojiri, Mihoko M., Sakaki, Yasuhito, and Webber, Bryan R.. Quark-gluon discrimination in the search for gluino pair production at the LHC. United States: N. p., Web. doi:10.1007/JHEP01(2017)044.
Bhattacherjee, Biplob, Mukhopadhyay, Satyanarayan, Nojiri, Mihoko M., Sakaki, Yasuhito, & Webber, Bryan R.. Quark-gluon discrimination in the search for gluino pair production at the LHC. United States. doi:10.1007/JHEP01(2017)044.
Bhattacherjee, Biplob, Mukhopadhyay, Satyanarayan, Nojiri, Mihoko M., Sakaki, Yasuhito, and Webber, Bryan R.. 2017. "Quark-gluon discrimination in the search for gluino pair production at the LHC". United States. doi:10.1007/JHEP01(2017)044. https://www.osti.gov/servlets/purl/1346819.
@article{osti_1346819,
title = {Quark-gluon discrimination in the search for gluino pair production at the LHC},
author = {Bhattacherjee, Biplob and Mukhopadhyay, Satyanarayan and Nojiri, Mihoko M. and Sakaki, Yasuhito and Webber, Bryan R.},
abstractNote = {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.},
doi = {10.1007/JHEP01(2017)044},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2017,
place = {United States},
year = {2017},
month = {1}
}