Searches for Supersymmetry at the Tevatron

Meyer, A.; Collaborations, Cdf

doi:10.1007/978-3-540-32841-4_28

Cited by 2 publications

(1 citation statement)

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“…From these searches [43,44,45,46], the pair-production of neutralinos with a mass up to 105 GeV and a cross section above 20 fb; neutralino-gravitino production with the neutralino mass up to 210 GeV and a cross section above 100 fb; and sleptons with a mass up to 100 GeV regardless of their lifetime are excluded. The program of minimal GMSB searches in the photon plus missing energy channel was carried on at the Tevatron, with both CDF and D0 experiments assuming electroweak production of neutralinos and setting similar limits on the neutralino mass to the LEP results [47,48,49]. The Tevatron experiments probed delayed photons for the first time [50], as possible signals from long-lived bino-like neutralinos.…”

Section: Gmsb Searchesmentioning

confidence: 99%

Search for Supersymmetry in pp Collisions at √s = 8 TeV with a Photon, Lepton, and Missing Transverse Energy

Iiyama¹

2017

Springer Theses

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This thesis presents a search for anomalous production of events with at least one photon, one electron or muon, and large missing transverse energy in proton-proton collisions at a center-of-mass energy of 8 TeV. A data set corresponding to an integrated luminosity of 19.7 fb −1 recorded in 2012 by the Compact Muon Solenoid detector at the CERN Large Hadron Collider is analyzed. The search is motivated by a class of supersymmetric extensions of the standard model with gauge-mediated supersymmetry breaking, which predicts decays of supersymmetric particles into a W boson, a photon, and highly energetic gravitinos, which are undetected and lead to a momentum imbalance in the plane transverse to the proton beams. The expected standard model background contributions of events featuring the same final state signature is estimated by separating the background processes into categories and applying estimation techniques tailored for each category. No excess of events with large missing transverse energy is observed beyond the expectations from standard model processes. The result of this search is interpreted as 95% confidence level upper limits on the production cross section of supersymmetric particles as well as generic new-physics particles in two simplified models. The cross section upper limits set by this search pose the most stringent constraint to date on the considered supersymmetric models.

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