Enhancing the discovery prospects for SUSY-like decays with a forgotten kinematic variable

Debnath, Dipsikha (0000 0004 1936 8091, Physics Department, University of Florida, Gainesville, FL, 32611, U.S.A.) (NHETC, Department of Physics and Astronomy, Rutgers, The State University of NJ, Piscataway, NJ, 08854, U.S.A.) ; Gainer, James (0000 0001 2188 0957, Department of Physics and Astronomy, University of Hawaii, Honolulu, HI, 96822, U.S.A.) ; Kilic, Can (0000 0004 1936 9924, Theory Group, Department of Physics, The University of Texas at Austin, Austin, TX, 78712, U.S.A.) ; Kim, Doojin (0000 0001 2156 142X, Theoretical Physics Department, CERN, Geneva, Switzerland) (0000 0001 2168 186X, Department of Physics, University of Arizona, Tucson, AZ, 85721, U.S.A.) ; Matchev, Konstantin (0000 0004 1936 8091, Physics Department, University of Florida, Gainesville, FL, 32611, U.S.A.) ; Yang, Yuan-Pao (0000 0004 1936 9924, Theory Group, Department of Physics, The University of Texas at Austin, Austin, TX, 78712, U.S.A.)

07 May 2019

Abstract: 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 Δ 4 which previously has been used to parameterize the boundary of the allowed four-body phase space. We highlight the advantages of using Δ 4 as a discovery variable, and present an analysis suggesting that the pairing of Δ 4 with another invariant mass variable leads to a significant improvement over more conventional variable choices and techniques.


Published in: JHEP 1905 (2019) 008
Published by: Springer/SISSA
DOI: 10.1007/JHEP05(2019)008
arXiv: 1809.04517
License: CC-BY-4.0



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