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SUMMARY:Searches for new interactions within the SMEFT framework at the LH
 C - Luca Mantani (DAMTP)
DTSTART:20211022T150000Z
DTEND:20211022T160000Z
UID:TALK162217@talks.cam.ac.uk
CONTACT:Maeve Madigan
DESCRIPTION:The existence of Beyond Standard Model (BSM) physics is firmly
  suggested by both experimental observations (Dark Matter\, neutrino masse
 s) and theoretical arguments. In the hypothesis that the scale of new phys
 ics is considerably higher than the energies probed at colliders\, we can 
 parametrise modified interactions induced by BSM effects among SM particle
 s in a model-independent framework\, the Standard Model Effective Field Th
 eory (SMEFT). Searches for indirect evidence of new physics are conceptual
 ly different from the direct ones that have characterised the first part o
 f the LHC program\, and both experimental and phenomenological studies are
  needed in order to maximise the chances of uncovering a BSM signal. A cha
 racteristic feature of modified interactions is that they can induce unita
 rity violating effects which can be exploited to gain sensitivity. In this
  direction\, a study of the top quark electroweak sector will be presented
 \, focusing on 2 → 2 scatterings and their embeddings in physical proces
 ses at colliders. One of the key features of the SMEFT is that deviations 
 from the SM interactions are correlated and global interpretations are the
 refore of fundamental importance. A combined interpretation of the Higgs\,
  top and diboson data from the LHC will be presented and the interplay bet
 ween the various datasets discussed.
LOCATION:Virtual Seminar 
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