ELFT HÍRADÓ

[szpl <szpl AT metal.elte.hu>]

ELTE Fizikai Intézet

                                ORTVAY KOLLOKVIUM

                    2018. szeptember 27., csütörtök, 15:00-kor
                Az ELTE Pázmány Péter s. 1/A alatti épületében
                           földszinti 0.81 előadóban

                                Trócsányi Zoltán
                        (ELTE, Elméleti Fizika Tanszék)

                All you wanted to know about the strong coupling

Kivonatos ismertetés:
The theoretical basis of our understanding of fundamental interactions is 
provided by quantum field theory (QFT). In QFTs our starting point is the 
Lagrangian density that usually contains free parameters called couplings. The 
theory of strong interaction is described by the Lagrangian of quantum 
chromodynamics (QCD) that contains the masses of the quarks and the strong 
coupling αs as free parameters. The latter controls the strength of the strong 
interactions among coloured particles. Thus, it is a fundamental parameter of 
nature that influences not only the rates of particle interactions, but also 
the fate of the universe the most significantly among the fundamental couplings
together with the mass of the heaviest quark.

In my talk I will discuss how αs can be determined and also the status of its
measurements and possible further improvements.