Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC
Abstract
The purpose of this review is to investigate what kind of physics can be extracted at the Large Hadron Collider (LHC), assuming a discovery is made in events with missing transverse momentum, as generically expected in supersymmetry (SUSY) with R-parity conservation. To set the scene, we first discuss the collider phenomenology of the six possible electroweakino benchmark scenarios, as they provide valuable insight into what one might be facing at the LHC. We review the existing methods for mass reconstruction from measured kinematic endpoints in the distributions of suitable variables, e.g. the invariant masses of various sets of visible decay products, as well as the MT2 and the M2 types of variables. We propose to extend the application of these methods to the various topologies of fully hadronic final states, possibly with hadronically reconstructed massive bosons (W, Z or h). We test the idea with a simplified simulation of events in the main electroweakino benchmark scenarios. We find that the fully hadronic events allow the complete determination of the relevant mass spectrum. For comparison, we also review the potential of the standard kinematic endpoint methods for final states involving leptons from the decays of (on-shell or off-shell) sleptons. We findmore »
- Authors:
-
- Univ. of Florida, Gainesville, FL (United States). Inst. for Fundamental Theory. Physics Dept.
- European Organization for Nuclear Research (CERN), Geneva (Switzerland); Ghent Univ. (Belgium)
- European Organization for Nuclear Research (CERN), Geneva (Switzerland)
- Publication Date:
- Research Org.:
- Univ. of Florida, Gainesville, FL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1802076
- Grant/Contract Number:
- SC0010296
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Physics. G, Nuclear and Particle Physics
- Additional Journal Information:
- Journal Volume: 46; Journal Issue: 11; Journal ID: ISSN 0954-3899
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Matchev, Konstantin T., Moortgat, Filip, and Pape, Luc. Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC. United States: N. p., 2019.
Web. doi:10.1088/1361-6471/ab3bb8.
Matchev, Konstantin T., Moortgat, Filip, & Pape, Luc. Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC. United States. https://doi.org/10.1088/1361-6471/ab3bb8
Matchev, Konstantin T., Moortgat, Filip, and Pape, Luc. Tue .
"Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC". United States. https://doi.org/10.1088/1361-6471/ab3bb8. https://www.osti.gov/servlets/purl/1802076.
@article{osti_1802076,
title = {Dreaming awake: disentangling the underlying physics in case of a SUSY-like discovery at the LHC},
author = {Matchev, Konstantin T. and Moortgat, Filip and Pape, Luc},
abstractNote = {The purpose of this review is to investigate what kind of physics can be extracted at the Large Hadron Collider (LHC), assuming a discovery is made in events with missing transverse momentum, as generically expected in supersymmetry (SUSY) with R-parity conservation. To set the scene, we first discuss the collider phenomenology of the six possible electroweakino benchmark scenarios, as they provide valuable insight into what one might be facing at the LHC. We review the existing methods for mass reconstruction from measured kinematic endpoints in the distributions of suitable variables, e.g. the invariant masses of various sets of visible decay products, as well as the MT2 and the M2 types of variables. We propose to extend the application of these methods to the various topologies of fully hadronic final states, possibly with hadronically reconstructed massive bosons (W, Z or h). We test the idea with a simplified simulation of events in the main electroweakino benchmark scenarios. We find that the fully hadronic events allow the complete determination of the relevant mass spectrum. For comparison, we also review the potential of the standard kinematic endpoint methods for final states involving leptons from the decays of (on-shell or off-shell) sleptons. We find that with 300 fb-1, the statistics for the leptonic events is very marginal and they look less promising than the fully hadronic channels. This corresponds to a complete reversal of the usual paradigm, where leptonic events comprised the gold-plated SUSY channels. Finally, we put together all available information and summarize what level of understanding of the underlying physics can be achieved. We show that, as a by-product of the mass reconstruction, it is also possible to determine the production cross sections and decay branching ratios, which in turn enable us to pinpoint the underlying model.},
doi = {10.1088/1361-6471/ab3bb8},
journal = {Journal of Physics. G, Nuclear and Particle Physics},
number = 11,
volume = 46,
place = {United States},
year = {Tue Sep 24 00:00:00 EDT 2019},
month = {Tue Sep 24 00:00:00 EDT 2019}
}
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