BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Memento EPFL//
BEGIN:VEVENT
SUMMARY:Cosmological constant curiosities
DTSTART:20210503T140000
DTEND:20210503T150000
DTSTAMP:20260430T045139Z
UID:3d74006e4fee25f37e88f46119566d557964b247fee0e5d98f29e96c
CATEGORIES:Conferences - Seminars
DESCRIPTION:John Donoghue (University of Massachusetts)\nI describe two fe
 atures associated with the renormalization of the cosmological constant. T
 he first is the cancellation of the leading cutoff dependence in zero-poin
 t-energy contributions to the cosmological constant – that depending on 
 the fourth power of the cutoff. This is canceled by a term in the path int
 egral measure\, which vanishes in dimensional regularization but not when 
 cutoffs are used. The second is a non-local partner to the cosmological co
 nstant. Loops of massive particles renormalize the cosmological constant\,
  and also come with an associated non-local effect\, schematically given a
 s m^4R(“log”/Box^2)R which is of zeroth order in the derivative expans
 ion. This new operator is active above the scales of the mass of the parti
 cle.
LOCATION:https://epfl.zoom.us/j/66203815699?pwd=R1g3ZEE1bzhOeXRJZEJQZjQyRk
 cxUT09
STATUS:CONFIRMED
END:VEVENT
END:VCALENDAR