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SUMMARY:Alessio  Maiezza - Renormalons and Resurgence applied to the QCD -
  Alessio  Maiezza
DTSTART:20220211T160000Z
DTEND:20220211T170000Z
UID:TALK168266@talks.cam.ac.uk
CONTACT:Rene Poncelet
DESCRIPTION:*The seminar will take place via Zoom "here":https://maths-cam
 -ac-uk.zoom.us/j/95215212460?pwd=TWN5cjJ3azErSUYremw5UWRKL0NKUT09.*\n\nAbs
 tract: \nWe discuss both conceptual and phenomenological aspects of the QF
 T and the renormalization group. A focus on\nthe ambiguities of the renorm
 alization group\, the renormalons\, is provided. We show that these can be
  described with a resurgent approach\, although their resummation is quant
 itatively non-unique. However\, the result can be written in a determined 
 analytical\nexpression and parameterized with a single\, arbitrary constan
 t. In particular\, we apply the theory to the QCD\, describing the\nAdler 
 function in the IR limit through the contribution of the resummed renormal
 ons. The resurgent expression reproduces well the behavior\nof the "experi
 mental" Adler function. With this tool at hand\, we deal with the current 
 muon g-2 discrepancy\, investigating the possibility that it can be satura
 ted by the QCD vacuum polarization function\, without the need for new par
 ticles.\n\n
LOCATION:Potter Room (B1.19)
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