About
An excess of top quark pair events in the dilepton channel was first reported by CMS in 2024 and later confirmed by ATLAS. CMS now presents a new measurement in the single-lepton channel, obtaining a cross section of 5.1 +/- 0.9 pb, consistent with the earlier dilepton result. The single-lepton channel is statistically independent of the dilepton channel and less sensitive to systematic uncertainties related to the jet energy scale calibration and the top quark mass. The observed excess is consistent with a simplified model of a color-singlet pseudoscalar toponium motivated by nonrelativistic quantum chromodynamics. The seminar will present the CMS measurements in both channels.
Refreshments will be served at 10h30
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The talk
Credits and licence
- Institution
- CERN
- Speaker
- Alexander Grohsjean
- Year
- 2026
- Language
- English
- Source
- CERN
- Licence
- CERN, as CERN states it. CERN's terms
- Attribution
- © CERN. CERN provides its audiovisual media free of charge for educational and informational use, credited to CERN; this lecture is shown in CERN's own player.
- Who can watch
- CERN gives no rating. Invisible Network shows it to Teens profiles and older, judged from what the source says about it. How courses are placed