DEPARTMENT OF PHYSICS / HIP JOINT COLLOQUIA / SEMINARS 2025

    • Tuesday 25 November 2025 at 10:15 in A315 and using Zoom : Mikael Myllymäki (Helsinki)
      Precision Top Quark Mass Measurement at CMS Using the Profile Likelihood Method
      Abstract:       The most precise top quark mass measurements at the LHC are based on the kinematic reconstruction of the decay products from top and antitop quark production, especially in the decay channel with a single lepton and multiple jets. The most precise individual top quark mass measurement to date is determined from a profile likelihood fit using data recorded in 2016 with the CMS detector [1]. The profile likelihood method enables systematic uncertainties to be constrained, so that the total precision of the measurement can be improved by including more data, even when the measurement is almost exclusively limited by systematic uncertainties. In this talk, an extension of the CMS 2016 measurement is presented using data from 2016–2018, which is projected to significantly improve the total uncertainty of the measurement through the profile likelihood fit. [1] CMS Collaboration, Eur. Phys. J. C 83 (2023) 963, arXiv:2302.01967.
    • Tuesday 9 December 2025 at 10:15 in A315 and using Zoom : Tuomas Lappi (Jyväskylä)
      TBA
      Abstract:       TBA
    • Tuesday 20 January 2025 at 10:15 in A315 and using Zoom: Michal Heller (Ghent)
      TBA
      Abstract:       TBA
    • Thursday 22 January 2025 at 10:15 in A315 and using Zoom : René Meyer (Würzburg)
      TBA
      Abstract:       TBA
    • Tuesday 24 March 2025 at 10:15 in A315 and using Zoom: Lotta Jokiniemi (Darmstadt)
      TBA
      Abstract:       TBA

Hopefully the up to 50 min + 10 min discussion long seminar/colloquium will be understandable to a wide audience.
Contacts: Keijo Kajantie (keijo kajantie at helsinki fi) [ HIP seminar],
Tushar Gupta  (tushar.gupta at helsinki fi) [cosmo seminar]

Other related seminars

Friday 10-12 seminar series in D114:Astrophysics seminar
Mathematical Physics Seminar and Workshop series Wed 14-16 in Exactum C123.
InstituteQ Events and Seminars