Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Bakhshiansohi, Hamed;Bondu, Olivier;Brochet, Sébastien;Bruno, Giacomo;CMS Collaboration;et.al.
(2018) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B782, p. 440-467 (2018)

Files

arXiv180101846.pdf
  • Open Access
  • Adobe PDF
  • 1.61 MB

Details

Authors
  • Bakhshiansohi, HamedUCLouvain
    Author
  • Bondu, OlivierUCLouvain
    Author
  • Brochet, SébastienUCLouvain
    Author
  • Author
  • Caputo, ClaudioUCLouvain
    Author
  • Caudron, AdrienUCLouvain
    Author
  • David, PieterUCLouvain
    Author
  • De Visscher, SimonUCLouvain
    Author
  • Author
  • Delcourt, MartinUCLouvain
    Author
  • Author
  • Author
  • Krintiras, GeorgiosUCLouvain
    Author
  • Author
  • Magitteri, AlessioUCLouvain
    Author
  • Mertens, AlexandreUCLouvain
    Author
  • Musich, MarcoUCLouvain
    Author
  • Piotrzkowski, KrzysztofUCLouvain
    Author
  • Author
  • Saggio, AlessiaUCLouvain
    Author
  • Vidal Marono, MiguelUCLouvain
    Author
  • Wertz, SébastienUCLouvain
    Author
  • Zobec, JozeUCLouvain
    Author
  • CMS Collaboration
    Author
  • et. al.
Show more
Abstract
A search is presented for new physics in events with two low-momentum, oppositely charged leptons (electrons or muons) and missing transverse momentum in proton-proton collisions at a centre-of-mass energy of 13 TeV. The data collected using the CMS detector at the LHC correspond to an integrated luminosity of 35.9 fb−1 . The observed event yields are consistent with the expectations from the standard model. The results are interpreted in terms of pair production of charginos and neutralinos ( χ˜1± and χ˜20 ) with nearly degenerate masses, as expected in natural supersymmetry models with light higgsinos, as well as in terms of the pair production of top squarks ( t˜ ), when the lightest neutralino and the top squark have similar masses. At 95% confidence level, wino-like χ˜1±/χ˜20 masses are excluded up to 230 GeV for a mass difference of 20 GeV relative to the lightest neutralino. In the higgsino-like model, masses are excluded up to 168 GeV for the same mass difference. For t˜ pair production, top squark masses up to 450 GeV are excluded for a mass difference of 40 GeV relative to the lightest neutralino.
Affiliations

Citations

Bakhshiansohi, H., Bondu, O., Brochet, S., Bruno, G., Caputo, C., Caudron, A., David, P., De Visscher, S., Delaere, C., Delcourt, M., François, B., Giammanco, A., Krintiras, G., Lemaitre, V., Magitteri, A., Mertens, A., Musich, M., Piotrzkowski, K., Quertenmont, L., et al. (2018). Search for new physics in events with two soft oppositely charged leptons and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B782, 440-467. https://doi.org/10.1016/j.physletb.2018.05.062 (Original work published 2018)