Dr. Jernej F. Kamenik: Venturing Beyond Known Physics with Top Quarks at the Tevatron and LHC
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Povzetek:
Venturing Beyond Known Physics with Top Quarks at the Tevatron and LHC
Dr. Jernej F. Kamenik, Institut Jožef Stefan, Ljubljana
The top quark is presently the heaviest known elementary particle. During the last 15 years since its discovery, its properties have been extensively studied by the CDF and D0 experiments at the Tevatron proton anti-proton collider in Fermilab. Recently, the CDF collaboration has reported the measurement of a large angular asymmetry in production of top and anti-top quark pairs, which cannot be accounted for by known production mechanisms within the standard model of elementary particles and interactions. I will discuss the significance of this signature in light of other existing precise measurements of top quark properties, which are in good agreement with standard model predictions. Then I will outline possible standard model extensions which are able to accommodate the discrepancy and at the same time address other outstanding open problems in high energy physics and cosmology, such as unification of fundamental interactions or cosmological dark matter abundance. Finally, I will discuss the implications of the CDF result for the ongoing new physics searches in the Atlas, CMS and LHCb experiments at the Large Hadron Collider in CERN. In particular I will show how these experiments are already probing the dynamics behind the intriguing CDF results.
