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SUMMARY:Topical Seminar: The CIPT-FOPT discrepancy for hadronic tau decays
DTSTART;VALUE=DATE-TIME:20230630T080000Z
DTEND;VALUE=DATE-TIME:20230630T095900Z
DTSTAMP;VALUE=DATE-TIME:20261017T034203Z
UID:indico-event-7125@indico.ific.uv.es
DESCRIPTION:\nThe discrepancy of the contour-improved (CIPT) and fixed-ord
 er perturbative (FOPT) expansion of moments for the hadronic tau decay inv
 ariant mass distribution has affected the uncertainty of strong coupling m
 easurements for many years. Recently\, the origin of the discrepancy has b
 een finally understood to be related to a sensitivity to infrared momenta 
 of the CIPT method that is not consistent with the operator product expans
 ion of QCD.The discrepancy can be reconciled by switching to a renormalon-
 free scheme for the dimension-4 gluon condensate matrix element\, which re
 nders CIPT to become compatible with FOPT. This will lead to a reduction o
 f the uncertainties in strong coupling determinations. In the talk review 
 the results I have obtained in a number of recent publications on this top
 ic\, elaborating on mathematical as well as conceptual aspects.\n\n\n\n\n\
 n\nA ZOOM connection is available here:\n\nhttps://dicv-csic-es.zoom.us/j/
 84735465044?pwd=\nMVltSWJ6L3ZGZSs2UitIYWM5c1dZdz09\n\n\nA recording is fou
 nd here ( password FrVx8*9$ ):\n\nhttps://dicv-csic-es.zoom.us/rec/share/m
 cKnRAXNQhluR8oaErGbYWVtZgxizvde-61WUshva3o1bANzDUEJamIimZt2EMs.hxV5LDnn4ZG
 03Fov\n\nhttps://indico.ific.uv.es/event/7125/
LOCATION:Universe 1001-Primera-1-1-1 - Paterna. Seminario
URL:https://indico.ific.uv.es/event/7125/
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