Dresden 2013 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 23: Quantenfeldtheorie 1

T 23.4: Vortrag

Dienstag, 5. März 2013, 17:40–17:55, WIL-C129

Higgs mass bounds from the functional RG — •René Sondenheimer and Holger Gies — Theoretisch-Physikalisches Institut, FSU Jena, Germany

We investigate a Top-Yukawa toy model to study Higgs mass bounds in the framework of the functional renormalization group (RG). Starting the calculations with a quartic ultraviolet (UV) potential we get a finite range of values for the Higgs mass in the infrared for a given cutoff. The bounds appear in a natural way as a consequence of the RG flow. The lower mass bound is approached for a vanishing UV quartic coupling. Furthermore, we study the influence of higher-dimensional operators on the lower Higgs mass bound. We find that even seemingly RG irrelevant interactions can take a substantial influence on the lower bound for the Higgs mass.