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SUMMARY:Topical seminar: Tracing new physics using EFT
DTSTART;VALUE=DATE-TIME:20221103T110000Z
DTEND;VALUE=DATE-TIME:20221103T123000Z
DTSTAMP;VALUE=DATE-TIME:20230130T043454Z
UID:indico-event-6751@indico.ific.uv.es
DESCRIPTION:The success of the Standard Model (SM) and the lack of direct
evidence of any beyond Standard Model particles impels us to look for ind
irect shreds of evidence. The effective field theory framework is just the
right tool for that. We can treat the SM as an effective theory by adding
higher dimensional terms to its Lagrangian and trying to capture the foot
print of the more complete UV theory\, this is commonly known as the botto
m-up approach. We have developed a tool named GrIP that builds higher dim
ensional operators of any mass dimension given information about the unde
rlying symmetry. On the other hand\, we can choose a complete UV theory\,
identify the heavy degrees of freedom\, integrate them out and obtain oper
ators of higher mass dimension\, known as the top-down approach. Covarian
t Derivative Expansion (CDE) is one of the methodologies that integrate ou
t heavy fields and generate the effective operator and their Wilson coeff
icient. The two most intriguing traits of CDE are\, firstly\, the method i
s manifestly gauge-invariant so the effective operators generated at the
end are also gauge-invariant. Secondly\, its applicability is universal. E
ncapsulating these features there is a formula dubbed as the universal one
-loop effective action (UOLEA) which has algorithmic essence to it. The M
athematica based package CoDEx based on the UOLEA is one of the tools that
can integrate out heavy particles from the tree as well as one-loop diagr
ams and generate effective operators of mass dimension-6. Explaining any d
eviation from the SM prediction incorporating effective operators has been
a common practice nowadays but it is difficult to trace back the origin
of those effective operators and connect them to some UV complete scenario
. We have developed a diagrammatic approach based on symmetry arguments to
address this problem.\n\nhttps://indico.ific.uv.es/event/6751/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/6751/
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