New angular (and other) cuts to improve the higgsino signal at the LHC
arXiv:2109.14030 · doi:10.1103/PhysRevD.105.095017
Abstract
Motivated by the fact that naturalness arguments strongly suggest that the SUSY-preserving higgsino mass parameter mu cannot be too far above the weak scale, we re-examine higgsino pair production in association with a hard QCD jet at the HL-LHC. We focus on \ell^+\ell^-+\eslt+j events from the production and subsequent decay, \tchi_2^0\to\tchi_1^0\ell^+\ell^-, of the heavier neutral higgsino. The novel feature of our analysis is that we suggest angular cuts to reduce the important background from Z(\to ττ)+j events more efficiently than the m_{ττ}^2<0 cut that has been used by the ATLAS and CMS collaborations. Other cuts, needed to reduce backgrounds from t\bar{t}, WWj and W/Z+\ell\bar{\ell} production, are also delineated. We plot out the reach of LHC14 for 300 and 3000~fb^{-1} and also show distributions that serve to characterize the higgsino signal, noting that higgsinos may well be the only superpartners accessible at LHC14 in a well-motivated class of natural SUSY models.
arXiv comment33 pages including 26 .png figures; version 2 has minor typo changes to coincide with published version
References in corpus (47)
- Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
- Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
- PYTHIA 6.4 Physics and Manual
- PYTHIA 6.2 Physics and Manual
- The anti-k_t jet clustering algorithm
- FastJet user manual
- DELPHES 3, A modular framework for fast simulation of a generic collider experiment
- MadGraph 5 : Going Beyond
- Quantization of Four-form Fluxes and Dynamical Neutralization of the Cosmological Constant
- Naturalness Constraints in Supersymmetric Theories with Non-Universal Soft Terms
- ISAJET 7.37: A Monte Carlo Event Generator for , , and Interactions
- Radiative natural SUSY with a 125 GeV Higgs boson
- The anthropic principle and the mass scale of the Standard Model
- Supersymmetry, Naturalness, and Signatures at the LHC
- Searches for electroweak production of supersymmetric particles with compressed mass spectra in TeV collisions with the ATLAS detector
- Radiative natural supersymmetry: Reconciling electroweak fine-tuning and the Higgs boson mass
- Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb of =13 TeV collision data with the ATLAS detector
- Hunting Quasi-Degenerate Higgsinos
- SUSY models under siege: LHC constraints and electroweak fine-tuning
- Monojet plus soft dilepton signal from light higgsino pair production at LHC14
- Hidden SUSY at the LHC: the light higgsino-world scenario and the role of a lepton collider
- How conventional measures overestimate electroweak fine-tuning in supersymmetric theory
- Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at TeV with the ATLAS detector
- Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at 13 TeV
- Anthropic considerations in multiple domain theories and the scale of electroweak symmetry breaking
- Supersymmetry Breaking in the Anthropic Landscape
- Statistical analysis of the supersymmetry breaking scale
- Supersymmetry, Naturalness, and Light Higgsinos
- Upper bounds on sparticle masses from naturalness or how to disprove weak scale supersymmetry
- Search for direct top squark pair production in events with one lepton, jets, and missing transverse momentum at 13 TeV with the CMS experiment
- Accessing the core of naturalness, nearly degenerate higgsinos, at the LHC
- Revisiting the SUSY mu problem and its solutions in the LHC era
- Radiatively-driven natural supersymmetry at the LHC
- Is natural higgsino-only dark matter excluded?
- Natural generalized mirage mediation
- Multi-channel assault on natural supersymmetry at the high luminosity LHC
- Challenging weak-scale supersymmetry at colliders
- Higgs and superparticle mass predictions from the string theory landscape
- LHC luminosity and energy upgrades confront natural supersymmetry models
- The Higgs mass and natural supersymmetric spectrum from the landscape
- The LHC higgsino discovery plane for present and future SUSY searches
- Naturalness versus stringy naturalness (with implications for collider and dark matter searches)
- The Search for Electroweakinos
- LHC SUSY and WIMP dark matter searches confront the string theory landscape
- Naturalness Under Stress
- PhD Thesis - Topics in SUSY Phenomenology at the LHC
- Angular cuts to reduce the tautaubar+jet background to the higgsino signal at the LHC