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CATEGORIES:HEP phenomenology joint Cavendish-DAMTP seminar
SUMMARY:Searches for new interactions within the SMEFT fra
 mework at the LHC - Luca Mantani (DAMTP)
DTSTART;TZID=Europe/London:20211022T160000
DTEND;TZID=Europe/London:20211022T170000
UID:TALK162217AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/162217
DESCRIPTION:The existence of Beyond Standard Model (BSM) physi
 cs is firmly suggested by both experimental observ
 ations (Dark Matter\, neutrino masses) and theoret
 ical arguments. In the hypothesis that the scale o
 f new physics is considerably higher than the ener
 gies probed at colliders\, we can parametrise modi
 fied interactions induced by BSM effects among SM 
 particles in a model-independent framework\, the S
 tandard Model Effective Field Theory (SMEFT). Sear
 ches for indirect evidence of new physics are conc
 eptually different from the direct ones that have 
 characterised the first part of the LHC program\, 
 and both experimental and phenomenological studies
  are needed in order to maximise the chances of un
 covering a BSM signal. A characteristic feature of
  modified interactions is that they can induce uni
 tarity 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 embeddi
 ngs in physical processes at colliders. One of the
  key features of the SMEFT is that deviations from
  the SM interactions are correlated and global int
 erpretations are therefore of fundamental importan
 ce. A combined interpretation of the Higgs\, top a
 nd diboson data from the LHC will be presented and
  the interplay between the various datasets discus
 sed.
LOCATION:Virtual Seminar 
CONTACT:Maeve Madigan
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