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Monojetlike Searches for Top Squarks with a b Tag

Spot the stop with a b-tag

Gabriele Ferretti (Institutionen för fundamental fysik) ; Christoffer Petersson (Institutionen för fundamental fysik) ; Riccardo Torre ; Roberto Franceschini
Physical Review Letters (0031-9007). Vol. 114 (2015), 20, p. Art. no. 201801.
[Artikel, refereegranskad vetenskaplig]

The LHC searches for light compressed stop squarks have resulted in considerable bounds in the case where the stop decays to a neutralino and a charm quark. However, in the case where the stop decays to a neutralino, a bottom quark and two fermions via an off-shell W-boson, there is currently a significant unconstrained region in the stop-neutralino mass plane, still allowing for stop masses in the range 90-140 GeV. In this paper we propose a new monojet-like search for light stops, optimized for the four-body decay mode, in which at least one b-tagged jet is required. We show that, already by using the existing 8 TeV LHC data set, such a search would cover the entire unconstrained region. Moreover, in the process of validating our tools against an ATLAS monojet search, we show that the existing limit can be extended to exclude also stop masses below 100 GeV.

Nyckelord: Supersymmetry, Stop squark, LHC

Denna post skapades 2015-06-11. Senast ändrad 2017-11-29.
CPL Pubid: 218238


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Denna publikation är ett resultat av följande projekt:

Sökandet efter ny fysik vid partikelacceleratorn Large Hadron Collider efter upptäckten av en higgs-lik partikel (VR//2013-475)