LHC Seminar

Boosting the precision of the top quark mass measurement with ATLAS

by Mark Andrew Owen (University of Glasgow (GB))

Europe/Zurich
222/R-001 (CERN)

222/R-001

CERN

200
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Description

The top quark mass is one of the key fundamental parameters of the Standard Model that must be determined experimentally. Its value is essential for testing the self-consistency of the Standard Model. This seminar presents a new measurement of the top quark mass conducted by ATLAS using the full Run 2 proton-proton dataset at 13 TeV. The measurement targets top-antitop-quark pair events where the hadronically decaying top quark has high transverse momentum and is reconstructed as a large-radius jet. A simultaneous fit is performed to the mean of the invariant mass of the large-radius jets and two additional kinematic observables that target the reduction of systematic uncertainties relating to the Jet Energy Scale and Monte Carlo modelling. This results in the most precise ATLAS top quark mass measurement from a single channel to date, with a total uncertainty of 0.53 GeV.

 

Refreshments will be served at 10h30

Organised by

Tancredi Carli, Jan Fiete Grosse-Oetringhaus and Michelangelo Mangano

Webcast
There is a live webcast for this event
Zoom Meeting ID
64374669057
Host
EP Seminars and Colloquia
Alternative host
John Cassar
Passcode
20029781
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