Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 81: Eingeladene Vorträge 3

T 81.5: Semi-Invited Talk

Thursday, March 12, 2015, 15:45–16:15, M.10.12 (HS 14)

Precision measurements of top-quark properties in view of New Physics — •Alexander Grohsjean — DESY, Hamburg, Germany

The discovery of the top quark in 1995 at the Fermilab Tevatron collider completed the quark sector of the Standard Model (SM) of particle physics and was a remarkable confirmation of this theory.

Due to its high mass and its Higgs Yukawa coupling close to one, the top quark may also play a special role in electroweak symmetry breaking and it is an excellent candidate to find New Physics beyond the SM. The complete dataset of the Tevatron collider as well as the large samples collected by the LHC allow for measurements of top-quark properties to unprecedented precision, challenging the accuracy of theoretical predictions and representing a high sensitivity to sources of New Physics.

In this talk, I present high-precision measurements of top-quark properties with special emphasis on the potential to discover New Physics. Final measurements from the Tevatron collider as well as recent results from the LHC experiments at a centre-of-mass energy of 7 and 8 TeV are discussed.