Simplified Models for LHC New Physics Searches
By D. Alves, N. Arkani-Hamed, S. Arora, Yang Bai, M. Baumgart, J. Berger, Matthew R. Buckley, B. Butler, Spencer Chang, Hsin-Chia Cheng and 84 more. 2011
652 citations recorded by the source corpus.
This document proposes a collection of simplified models relevant to the design of new-physics searches at the Large Hadron Collider (LHC) and the characterization of their results. Both ATLAS and CMS have already presented some results in terms of simplified models, and we encourage them to continue and expand this effort, which supplements both signature-based results and benchmark model interpretations. A simplified model is defined by an effective Lagrangian describing the interactions of a small number of new particles. Simplified models can equally well be described by a small number of masses and cross-sections. These parameters are directly related to collider physics observables, making simplified models a particularly effective framework for evaluating searches and a useful starting point for characterizing positive signals of new physics. This document serves as an official summary of the results from the 'Topologies for Early LHC Searches' workshop, held at SLAC in September of 2010, the purpose of which was to develop a set of representative models that can be used to cover all relevant phase space in experimental searches. Particular emphasis is placed on searches relevant for the first similar to 50-500 pb(-1) of data and those motivated by supersymmetric models. This note largely summarizes material posted at http://lhcnewphysics.org/, which includes simplified model definitions, Monte Carlo material, and supporting contacts within the theory community. We also comment on future developments that may be useful as more data is gathered and analyzed by the experiments.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/e65e5c78c96e5db0030267e2f4bd0253dd45fc74
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Citations in the corpus
- Search for supersymmetry in proton-proton collisions at 13 TeV in final states with jets and missing transverse momentum (2019, methodology): “For this purpose, we use so-called simplified models [33–36].”
- Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV (2017, background): “The ~ χ þ 1 is assumed to be nearly degenerate in mass with the ~ χ1, representing the expected situation should the ~ χ1 and ~ χ 0 1 appear within the same SU(2) multiplet [26].”
- Search for electroweak production of charginos and neutralinos in multilepton final states in proton-proton collisions at s=13$$ \sqrt{s}=13 $$ TeV (2017, methodology): “The results are interpreted using simplified models [24, 25].”
- Searching for long-lived particles beyond the Standard Model at the Large Hadron Collider (2019, methodology): “In the context of searches for prompt signatures with E T, the use of simplified models has been shown to be a fruitful approach for both the experimental and theoretical communities [74, 76, 78, 87, 88, 480, 481].”
- Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at √s = 13 TeV with the ATLAS detector (2017, neutral): “For the SUSY signals, two sets of simplified models [53 – 55] are used to guide the design of the analysis: one based on direct production of Higgsino states (referred to as the Higgsino model), and the other a model involving pair production of sleptons which decay to a pure bino LSP.”
- Searches for electroweak production of supersymmetric particles with compressed mass spectra in √s = 13 TeV pp collisions with the ATLAS detector (2019, methodology): “Simplified SUSY models [10–12] are used to optimize the searches and interpret the results.”
- CheckMATE: Confronting your favourite new physics model with LHC data (2013, methodology): “The second approach employed to great effect at the LHC uses simplified models [15].”