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SUMMARY:Froggatt-Nielsen Models Meet the SMEFT - Eetu Loisa (Cambridge U.)
DTSTART:20240503T150000Z
DTEND:20240503T160000Z
UID:TALK216031@talks.cam.ac.uk
CONTACT:Nico Gubernari
DESCRIPTION:The Froggatt-Nielsen (FN) mechanism is one of the oldest and s
 implest attempts at explaining the striking hierarchies observed in the fe
 rmion masses and mixings. Given that FN models give rise to the correct fe
 rmion masses and mixings by construction and that the new particles predic
 ted by the models are typically assumed to be heavy\, it is not clear if t
 he models are experimentally falsifiable. In this talk\, we try to shed li
 ght on the question of falsifiability by analysing the infrared features o
 f FN models whilst staying maximally agnostic about the fine details of th
 e model. We achieve our goal by writing down a FN effective field theory\,
  capturing all the local interactions allowed in the ultraviolet\, and mat
 ching it to the Standard Model effective field theory (SMEFT) at the tree-
  and 1-loop-level. Our results indicate a rich and non-trivial signature o
 f FN models on the SMEFT Wilson coefficients\, leaving us with falsifiable
  predictions that could be studied at current and future colliders.
LOCATION:MR19 (Potter Room\, Pavilion B)\, CMS
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