Enhancing the discovery prospects for SUSY-like decays with a forgotten kinematic variable
- 35 Downloads
The lack of a new physics signal thus far at the Large Hadron Collider motivates us to consider how to look for challenging final states, with large Standard Model backgrounds and subtle kinematic features, such as cascade decays with compressed spectra. Adopting a benchmark SUSY-like decay topology with a four-body final state proceeding through a sequence of two-body decays via intermediate resonances, we focus our attention on the kinematic variable Δ4 which previously has been used to parameterize the boundary of the allowed four-body phase space. We highlight the advantages of using Δ4 as a discovery variable, and present an analysis suggesting that the pairing of Δ4 with another invariant mass variable leads to a significant improvement over more conventional variable choices and techniques.
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
- T. Carli, Physics highlights of ATLAS and ALICE, talk given at XXXIX international Conference on High Energy Physics (ICHEP 2018), July 4–11, Seoul, South Korea (2018).Google Scholar
- A. Rahatlou, Highlights from CMS and LHCb, talk given at XXXIX international Conference on High Energy Physics (ICHEP 2018), July 4–11, Seoul, South Korea (2018).Google Scholar
- M. Zarucki, Search for supersymmetry with a highly compressed mass spectrum in the single soft lepton channel with the CMS experiment at the LHC, PoS(EPS-HEP2017)728.
- ATLAS, CMS collaboration, Search for supersymmetry with extremely compressed spectra with the ATLAS and CMS detectors, Nucl. Part. Phys. Proc. 273-275 (2016) 631 [INSPIRE].
- G. Zevi Della Porta, Compressed and Stealth SUSY searches with ATLAS and CMS, PoS(LHCP2016)155.
- C. Lester, Mass and spin measurement techniques (for the LHC), in The dark secrets of the Terascale, T. Tait and K. Matchev eds., World Scientific, Singapore (2012).Google Scholar
- CMS collaboration, CMS Physics: technical design report. Volume 1: detector performance and software, CERN-LHCC-2006-001 (2006).