Dissecting jets and missing energy searches using $$n$$-body extended simplified models
Abstract
Simplified Models are a useful way to characterize new physics scenarios for the LHC. Particle decays are often represented using non-renormalizable operators that involve the minimal number of fields required by symmetries. Generalizing to a wider class of decay operators allows one to model a variety of final states. This approach, which we dub the $$n$$-body extension of Simplified Models, provides a unifying treatment of the signal phase space resulting from a variety of signals. In this paper, we present the first application of this framework in the context of multijet plus missing energy searches. The main result of this work is a global performance study with the goal of identifying which set of observables yields the best discriminating power against the largest Standard Model backgrounds for a wide range of signal jet multiplicities. Our analysis compares combinations of one, two and three variables, placing emphasis on the enhanced sensitivity gain resulting from non-trivial correlations. Utilizing boosted decision trees, we compare and classify the performance of missing energy, energy scale and energy structure observables. We demonstrate that including an observable from each of these three classes is required to achieve optimal performance. In conclusion, this work additionally serves to establish the utility of $$n$$-body extended Simplified Models as a diagnostic for unpacking the relative merits of different search strategies, thereby motivating their application to new physics signatures beyond jets and missing energy.
- Authors:
-
- Univ. of Oregon, Eugene, OR (United States)
- Univ. of Melbourne (Australia)
- Johannes Gutenberg-Univ., Mainz (Germany)
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1287383
- Report Number(s):
- FERMILAB-PUB-16-122-E; arXiv:1605.01416
Journal ID: ISSN 1029-8479; 1455878
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of High Energy Physics (Online)
- Additional Journal Information:
- Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 8; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Hadron-Hadron scattering (experiments); Dark matter; supersymmetry
Citation Formats
Cohen, Timothy, Dolan, Matthew J., El Hedri, Sonia, Hirschauer, James, Tran, Nhan, and Whitbeck, Andrew. Dissecting jets and missing energy searches using $n$-body extended simplified models. United States: N. p., 2016.
Web. doi:10.1007/JHEP08(2016)038.
Cohen, Timothy, Dolan, Matthew J., El Hedri, Sonia, Hirschauer, James, Tran, Nhan, & Whitbeck, Andrew. Dissecting jets and missing energy searches using $n$-body extended simplified models. United States. https://doi.org/10.1007/JHEP08(2016)038
Cohen, Timothy, Dolan, Matthew J., El Hedri, Sonia, Hirschauer, James, Tran, Nhan, and Whitbeck, Andrew. Thu .
"Dissecting jets and missing energy searches using $n$-body extended simplified models". United States. https://doi.org/10.1007/JHEP08(2016)038. https://www.osti.gov/servlets/purl/1287383.
@article{osti_1287383,
title = {Dissecting jets and missing energy searches using $n$-body extended simplified models},
author = {Cohen, Timothy and Dolan, Matthew J. and El Hedri, Sonia and Hirschauer, James and Tran, Nhan and Whitbeck, Andrew},
abstractNote = {Simplified Models are a useful way to characterize new physics scenarios for the LHC. Particle decays are often represented using non-renormalizable operators that involve the minimal number of fields required by symmetries. Generalizing to a wider class of decay operators allows one to model a variety of final states. This approach, which we dub the $n$-body extension of Simplified Models, provides a unifying treatment of the signal phase space resulting from a variety of signals. In this paper, we present the first application of this framework in the context of multijet plus missing energy searches. The main result of this work is a global performance study with the goal of identifying which set of observables yields the best discriminating power against the largest Standard Model backgrounds for a wide range of signal jet multiplicities. Our analysis compares combinations of one, two and three variables, placing emphasis on the enhanced sensitivity gain resulting from non-trivial correlations. Utilizing boosted decision trees, we compare and classify the performance of missing energy, energy scale and energy structure observables. We demonstrate that including an observable from each of these three classes is required to achieve optimal performance. In conclusion, this work additionally serves to establish the utility of $n$-body extended Simplified Models as a diagnostic for unpacking the relative merits of different search strategies, thereby motivating their application to new physics signatures beyond jets and missing energy.},
doi = {10.1007/JHEP08(2016)038},
journal = {Journal of High Energy Physics (Online)},
number = 8,
volume = 2016,
place = {United States},
year = {Thu Aug 04 00:00:00 EDT 2016},
month = {Thu Aug 04 00:00:00 EDT 2016}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 4 works
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Search for gluino mediated bottom- and top-squark production in multijet final states in pp collisions at 8 TeV
journal, October 2013
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- Physics Letters B, Vol. 725, Issue 4-5
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
journal, July 2002
- Pumplin, Jonathan; Stump, Daniel Robert; Huston, Joey
- Journal of High Energy Physics, Vol. 2002, Issue 07
Searches for supersymmetry based on events with b jets and four W bosons in pp collisions at 8 TeV
journal, May 2015
- Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
- Physics Letters B, Vol. 745
QCD radiation in the production of heavy colored particles at the LHC
journal, February 2009
- Alwall, Johan; Visscher, Simon de; Maltoni, Fabio
- Journal of High Energy Physics, Vol. 2009, Issue 02
Split supersymmetry
journal, November 2004
- Giudice, G. F.; Romanino, A.
- Nuclear Physics B, Vol. 699, Issue 1-2
Search for new phenomena in final states with large jet multiplicities and missing transverse momentum with ATLAS using proton–proton collisions
journal, June 2016
- Aad, G.; Abbott, B.; Abdallah, J.
- Physics Letters B, Vol. 757
A variable for measuring masses at hadron colliders when missing energy is expected; m T 2 : the truth behind the glamour
journal, September 2003
- Barr, Alan; Lester, Christopher; Stephens, Phil
- Journal of Physics G: Nuclear and Particle Physics, Vol. 29, Issue 10
PYTHIA 6.4 physics and manual
journal, May 2006
- Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
- Journal of High Energy Physics, Vol. 2006, Issue 05
CheckMATE: Confronting your favourite new physics model with LHC data
journal, February 2015
- Drees, Manuel; Dreiner, Herbert K.; Kim, Jong Soo
- Computer Physics Communications, Vol. 187
Search for supersymmetry in hadronic final states with missing transverse energy using the variables α T and b-quark multiplicity in pp collisions at $\sqrt{s} = 8\ \mathrm{TeV}$
journal, September 2013
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- The European Physical Journal C, Vol. 73, Issue 9
ALPGEN, a generator for hard multiparton processes in hadronic collisions
journal, July 2003
- Mangano, Michelangelo L.; Piccinini, Fulvio; Polosa, Antonio D.
- Journal of High Energy Physics, Vol. 2003, Issue 07
Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
journal, December 2007
- Alwall, J.; Höche, S.; Krauss, F.
- The European Physical Journal C, Vol. 53, Issue 3
Studies of boosted decision trees for MiniBooNE particle identification
journal, December 2005
- Yang, Hai-Jun; Roe, Byron P.; Zhu, Ji
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 555, Issue 1-2
Addressing the multi-channel inverse problem at high energy colliders: a model-independent approach to the search for new physics with trileptons
journal, June 2012
- Dube, S.; Glatzer, J.; Somalwar, S.
- Journal of Physics G: Nuclear and Particle Physics, Vol. 39, Issue 8
Gluino decays in Split Supersymmetry
journal, October 2005
- Gambino, P.; Giudice, G. F.; Slavich, P.
- Nuclear Physics B, Vol. 726, Issue 1-2
On the existence of angular correlations in decays with heavy matter partners
journal, May 2007
- Kilic, Can; Wang, Lian-Tao; Yavin, Itay
- Journal of High Energy Physics, Vol. 2007, Issue 05
Fastlim: a fast LHC limit calculator
journal, November 2014
- Papucci, Michele; Sakurai, Kazuki; Weiler, Andreas
- The European Physical Journal C, Vol. 74, Issue 11
Boosted decision trees as an alternative to artificial neural networks for particle identification
journal, May 2005
- Roe, Byron P.; Yang, Hai-Jun; Zhu, Ji
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 543, Issue 2-3
Search for supersymmetry in the multijet and missing transverse momentum final state in pp collisions at 13 TeV
journal, July 2016
- Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
- Physics Letters B, Vol. 758
Supersymmetric unification without low energy supersymmetry and signatures for fine-tuning at the LHC
journal, June 2005
- Arkani-Hamed, Nima; Dimopoulos, Savas
- Journal of High Energy Physics, Vol. 2005, Issue 06
Measuring masses of semi-invisibly decaying particle pairs produced at hadron colliders
journal, September 1999
- Lester, C. G.; Summers, D. J.
- Physics Letters B, Vol. 463, Issue 1
Dijet Searches for Supersymmetry at the Large Hadron Collider
journal, November 2008
- Randall, Lisa; Tucker-Smith, David
- Physical Review Letters, Vol. 101, Issue 22
Multi-lepton signals of multiple Higgs bosons
journal, February 2013
- Craig, Nathaniel; Evans, Jared A.; Gray, Richard
- Journal of High Energy Physics, Vol. 2013, Issue 2
Search for supersymmetry using razor variables in events with -tagged jets in collisions at
journal, March 2015
- Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
- Physical Review D, Vol. 91, Issue 5
Jet substructure by accident
journal, March 2013
- Cohen, Timothy; Izaguirre, Eder; Lisanti, Mariangela
- Journal of High Energy Physics, Vol. 2013, Issue 3
Learning how to count: a high multiplicity search for the LHC
journal, August 2013
- El Hedri, Sonia; Hook, Anson; Jankowiak, Martin
- Journal of High Energy Physics, Vol. 2013, Issue 8
Jet substructure templates: data-driven QCD backgrounds for fat jet searches
journal, May 2014
- Cohen, Timothy; Jankowiak, Martin; Lisanti, Mariangela
- Journal of High Energy Physics, Vol. 2014, Issue 5
Search for massive supersymmetric particles decaying to many jets using the ATLAS detector in collisions at
journal, June 2015
- Aad, G.; Abbott, B.; Abdallah, J.
- Physical Review D, Vol. 91, Issue 11
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014
- Alwall, J.; Frederix, R.; Frixione, S.
- Journal of High Energy Physics, Vol. 2014, Issue 7
Heavy squarks at the LHC
journal, March 2011
- Fan, JiJi; Krohn, David; Mosteiro, Pablo
- Journal of High Energy Physics, Vol. 2011, Issue 3
Semivisible Jets: Dark Matter Undercover at the LHC
journal, October 2015
- Cohen, Timothy; Lisanti, Mariangela; Lou, Hou Keong
- Physical Review Letters, Vol. 115, Issue 17
On jet mass distributions in Z+jet and dijet processes at the LHC
journal, October 2012
- Dasgupta, Mrinal; Khelifa-Kerfa, Kamel; Marzani, Simone
- Journal of High Energy Physics, Vol. 2012, Issue 10
Towards an understanding of jet substructure
journal, September 2013
- Dasgupta, Mrinal; Fregoso, Alessandro; Marzani, Simone
- Journal of High Energy Physics, Vol. 2013, Issue 9
Evidence for Production of Single Top Quarks and First Direct Measurement of
journal, May 2007
- Abazov, V. M.; Abbott, B.; Abolins, M.
- Physical Review Letters, Vol. 98, Issue 18
Stochastic gradient boosting
journal, February 2002
- Friedman, Jerome H.
- Computational Statistics & Data Analysis, Vol. 38, Issue 4
ROOT — An object oriented data analysis framework
journal, April 1997
- Brun, Rene; Rademakers, Fons
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 389, Issue 1-2
Factors associated with sufficient knowledge of antibiotics and antimicrobial resistance in the Japanese general population
journal, February 2020
- Tsuzuki, Shinya; Fujitsuka, Niina; Horiuchi, Keisuke
- Scientific Reports, Vol. 10, Issue 1
Searches for supersymmetry based on events with b jets and four W bosons in pp collisions at 8 TeV
text, January 2015
- Khachatryan, Vardan; Sirunyan, Albert M.; Tumasyan, Armen
- RWTH Aachen University
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
text, January 2014
- Alwall, J.; Frederix, R.; Frixione, S.
- Springer
Search for supersymmetry in the multijet and missing transverse momentum final state in pp collisions at 13 TeV
text, January 2016
- Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
- North-Holland
Search for supersymmetry in hadronic final states with missing transverse energy using the variables αT and b-quark multiplicity in pp collisions at √s=8 TeV
text, January 2013
- Collaboration, Cms; Chatrchyan, Serguei; Bachmair, Felix
- ETH Zurich
Search for gluino mediated bottom- and top-squark production in multijet final states in pp collisions at 8 TeV
text, January 2013
- Collaboration, Cms; Chatrchyan, S.; Khachatryan, V.
- Elsevier
QCD radiation in the production of heavy colored particles at the LHC
text, January 2008
- Alwall, Johan; de Visscher, Simon; Maltoni, Fabio
- arXiv
Multi-Lepton Signals of Multiple Higgs Bosons
text, January 2012
- Craig, Nathaniel; Evans, Jared A.; Gray, Richard
- arXiv
Jet Substructure by Accident
text, January 2012
- Cohen, Timothy; Izaguirre, Eder; Lisanti, Mariangela
- arXiv
Methods and Results for Standard Model Event Generation at $\sqrt{s}$ = 14 TeV, 33 TeV and 100 TeV Proton Colliders (A Snowmass Whitepaper)
preprint, January 2013
- Avetisyan, Aram; Campbell, John M.; Cohen, Timothy
- arXiv
Search for supersymmetry using razor variables in events with b-tagged jets in pp collisions at sqrt(s) = 8 TeV
text, January 2015
- Collaboration, Cms
- arXiv
Semi-visible Jets: Dark Matter Undercover at the LHC
text, January 2015
- Cohen, Timothy; Lisanti, Mariangela; Lou, Hou Keong
- arXiv
Evidence for production of single top quarks and first direct measurement of |Vtb|
text, January 2006
- Collaboration, D0; Abazov, V. M.
- arXiv
New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
text, January 2002
- Pumplin, J.; Stump, D. R.; Huston, J.
- arXiv
Gluino Decays in Split Supersymmetry
text, January 2005
- Gambino, P.; Giudice, G. F.; Slavich, P.
- arXiv
On the Existence of Angular Correlations in Decays with Heavy Matter Partners
text, January 2007
- Kilic, Can; Wang, Lian-Tao; Yavin, Itay
- arXiv
Supersymmetric Unification Without Low Energy Supersymmetry And Signatures for Fine-Tuning at the LHC
text, January 2004
- Arkani-Hamed, Nima; Dimopoulos, Savas
- arXiv
Works referencing / citing this record:
Likelihood analysis of supersymmetric SU(5) GUTs
text, January 2017
- Bagnaschi, E.; Costa, J. C.; Sakurai, K.
- Deutsches Elektronen-Synchrotron, DESY, Hamburg
Likelihood analysis of supersymmetric SU(5) GUTs
journal, February 2017
- Bagnaschi, E.; Costa, J. C.; Sakurai, K.
- The European Physical Journal C, Vol. 77, Issue 2
Likelihood analysis of supersymmetric SU(5) GUTs
text, January 2017
- Bagnaschi, E.; Costa, J. C.; Sakurai, K.
- Springer
(Machine) Learning to Do More with Less
text, January 2017
- Cohen, Timothy; Freytsis, Marat; Ostdiek, Bryan
- arXiv