Measuring top-quarks with the highest precision and at record energies
using the ATLAS detector at the LHC, and "hedgehog" events at the LHC
revisited.
Dr. Leonid Serkin, ICN-UNAM
The LHC produces a vast sample of top quarks - the heaviest known
elementary particles. I will review two recent measurements of the
inclusive top quark pair production cross-section, sigma(ttbar), in which I had
a leading role within the ATLAS Collaboration. The first measurement,
chosen as the ATLAS highlight at CERN's Courier in September 2022, is the
most precise measurement of sigma(ttbar) at sqrt(s) = 5.02 TeV. In addition, I will
present the hot off the press measurement of sigma(ttbar) at the record
centre-of-mass energy of 13.6 TeV using the data collected in August 2022.
In the last part of my talk, I will focus on the work done in collaboration
with Dr. Guy Paic concerning the intriguing "hedgehog" events at the LHC,
and pave the way for their study using collision data.
Liga de Zoom:
https://cuaieed-unam.zoom.us/j/84528020176?pwd=ODRubmFxN2V1UjAyYUJvTGRFbGxaQT09