Skip to ContentSkip to Navigation
About us Latest news News News articles

Flavours of gauge theories

14 January 2011

PhD ceremony: Mr. A. Deuzeman, 11.00 uur, Academiegebouw, Broerstraat 5, Groningen

Title: Flavours of gauge theories

Promotor(s): prof. E. Pallante

Faculty: Mathematics and Natural Sciences


The introduction of fermionic degrees of freedom in non-Abelian gauge theories has the potential of substantially altering the gauge dynamics. This dissertation present the results of studies of SU(3) gauge theories with increasing fundamental quark content by means of lattice simulations. After an introduction to the effects of including dynamical quarks in lattice simulations, results on pioneering attempts of the inclusion of dynamical charm quarks in large scale lattice simulations are reported. Subsequent chapters move beyond phenomenology of the Standard Model, to study the effects of large numbers of light quark flavours. Results from perturbation theory suggest the possible appearance of a new phase in theories possessing more than a certain critical number of quark flavours. The appearance of such a phase potentially has a large impact on physics beyond the Standard Model, but the particular critical value of quark flavours and indeed the existence of such a phase itself have been disputed. Using methods inspired by the physics of phase transitions, the absence of such a novel phase in the case of eight quark flavours is shown. At twelve flavours, however, strong indications are found that the theory is no longer in the regular phase of QCD. Preliminary results on the properties of such a theory are presented.


Last modified:13 March 2020 01.12 a.m.
View this page in: Nederlands

More news

  • 11 June 2024

    Hydrogen seeps into nooks and crannies

    Because hydrogen is a much smaller molecule than natural gas, it can easily leak. Even worse, despite its small size, hydrogen can affect larger materials and make them as brittle as glass.

  • 10 June 2024

    Swarming around a skyscraper

    Every two weeks, UG Makers puts the spotlight on a researcher who has created something tangible, ranging from homemade measuring equipment for academic research to small or larger products that can change our daily lives. That is how UG...

  • 06 June 2024

    ‘We could not have dreamed of this’

    An international team of researchers, led by Groningen PhD candidate Aditya Arabhavi, has discovered that disks around very faint young stars are very different from those around Sun-like stars.