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Search for direct pair production of supersymmetric partners to the τ\tau lepton in proton-proton collisions at s=\sqrt{s}= 13 TeV

Collaboration
Jul 30, 2019
52 pages
Published in:
  • Eur.Phys.J.C 80 (2020) 3, 189
  • Published: Mar 2, 2020
e-Print:
DOI:
Report number:
  • CMS-SUS-18-006,
  • CERN-EP-2019-154
Experiments:
View in:
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Abstract: (Springer)
A search is presented for τ\tau slepton pairs produced in proton-proton collisions at a center-of-mass energy of 13 TeV. The search is carried out in events containing two τ\tau leptons in the final state, on the assumption that each τ\tau slepton decays primarily to a τ\tau lepton and a neutralino. Events are considered in which each τ\tau lepton decays to one or more hadrons and a neutrino, or in which one of the τ\tau leptons decays instead to an electron or a muon and two neutrinos. The data, collected with the CMS detector in 2016 and 2017, correspond to an integrated luminosity of 77.2 fb−1^{-1}. The observed data are consistent with the standard model background expectation. The results are used to set 95% confidence level upper limits on the cross section for τ\tau slepton pair production in various models for τ\tau slepton masses between 90 and 200 GeV and neutralino masses of 1, 10, and 20 GeV. In the case of purely left-handed τ\tau slepton production and decay to a τ\tau lepton and a neutralino with a mass of 1 GeV, the strongest limit is obtained for a τ\tau slepton mass of 125 GeV at a factor of 1.14 larger than the theoretical cross section.
Note:
  • p p: colliding beams
  • stau: pair production
  • tau: pair production
  • tau: hadronic decay
  • stau: decay
  • slepton: mass
  • p p: scattering
  • slepton: decay
  • slepton: pair production
  • slepton: production
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