Search for Supersymmetry with a Compressed Mass Spectrum in Events with a Soft τ Lepton, a Highly Energetic Jet, and Large Missing Transverse Momentum in Proton-Proton Collisions at √s=13 TeV
| Parent link: | Physical Review Letters Vol. 124, iss. 4.— 2020.— [041803, 19 p.] |
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| Other Authors: | , , , , , |
| Summary: | Title screen The first search for supersymmetry in events with an experimental signature of one soft, hadronically decaying τ lepton, one energetic jet from initial-state radiation, and large transverse momentum imbalance is presented. These event signatures are consistent with direct or indirect production of scalar τ leptons (˜τ) in supersymmetric models that exhibit coannihilation between the ˜τ and the lightest neutralino (˜χ01), and that could generate the observed relic density of dark matter. The data correspond to an integrated luminosity of 77.2 fb−1 of proton-proton collisions at √s=13 TeV collected with the CMS detector at the LHC in 2016 and 2017. The results are interpreted in a supersymmetric scenario with a small mass difference (Δm) between the chargino (˜χ±1) or next-to-lightest neutralino (˜χ02), and the ˜χ01. The mass of the ˜τ is assumed to be the average of the ˜χ±1 and ˜χ01 masses. The data are consistent with standard model background predictions. Upper limits at 95% confidence level are set on the sum of the ˜χ±1, ˜χ02, and ˜τ production cross sections for Δm(˜χ±1,˜χ01)=50 GeV, resulting in a lower limit of 290 GeV on the mass of the ˜χ±1, which is the most stringent to date and surpasses the bounds from the LEP experiments. Режим доступа: по договору с организацией-держателем ресурса |
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2020
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| Online Access: | https://doi.org/10.1103/PhysRevLett.124.041803 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666414 |