FPD Seminar
Observation of four-top-quark production in the multi lepton final state with the ATLAS Detector – Zhi Zheng (Stanford/SLAC)
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America/Los_Angeles
48/2-224 - Madrone (SLAC)
48/2-224 - Madrone
SLAC
28
Description
We report the observation of four-top-quark (tttt) production in the LHC collision, performed using an integrated luminosity of 140~fb-1 at a centre-of-mass energy of 13~TeV collected using the ATLAS detector.
For this new result, by leveraging developments in detector performance, new analysis techniques and a better understanding of major background processes, the significance for tttt signal improved significantly compared with previous result.
Data are also used to set limits on the three-top-quark production cross section, being an irreducible background not measured previously, and to constrain the top-Higgs Yukawa coupling and effective field theory operator coefficients that affect tttt production.
Join from PC, Mac, Linux, iOS or Android: https://stanford.zoom.us/j/98973156241?pwd=cEU5RFdlVXoyc0JTeTlDMkozKzQ5UT09
Organised by
Federico Bianchini, Yifan Chen
(fbianc@slac, cyifan@slac)
Glenna Paige