A search for R-parity violating supersymmetric decays of the top squark to a b-jet and a lepton in √s = 13 TeV pp collisions with the ATLAS detector · arXivDesk
2406.18367Jun 26, 202448 pages in total, author list starting page 31, 3 tables, 9 figures, published in Physical Review D. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-37/
A search for R-parity violating supersymmetric decays of the top squark to a b-jet and a lepton in s = 13 TeV pp collisions with the ATLAS detector
A search is presented for direct pair production of the stop, the supersymmetric partner of the top quark, in a decay through an R-parity violating coupling to a charged lepton and a b-quark. The dataset corresponds to an integrated luminosity of 140 fb−1 of proton-proton collisions at a center-of-mass energy of s
Nearby in the stack
= 13 TeV collected between 2015 and 2018 by the ATLAS detector at the LHC. The final state has two charged leptons (electrons or muons) and two
b
-jets. The results of the search are interpreted in the context of a Minimal Supersymmetric Standard Model with an additional
B−L
gauge symmetry that is spontaneously broken. No significant excess is observed over the Standard Model background and exclusion limits on stop pair production are set at 95% confidence level. The corresponding lower limits on the stop mass for 100% branching ratios to a
b
-quark and an electron, muon, or tau-lepton are 1.9 TeV, 1.8 TeV and 800 GeV, respectively, extending the reach of previous LHC searches.