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SUMMARY:Helicity Polarization Interference in Polarized Single- and Multib
 oson Production
DTSTART:20261022T120000Z
DTEND:20261022T133000Z
DTSTAMP:20261003T123600Z
UID:indico-event-1675@indico.ifj.edu.pl
DESCRIPTION:Speakers: Richard Ruiz (IFJ PAN)\n\nAfter electroweak symmetry
  breaking\, the W and Z bosons acquire masses and possess longitudinal pol
 arizations in the on-shell limit. This is a radical departure from the phy
 sics of on-shell photons and gluons\, and motivates many measurements and 
 searchers at the Large Hadron Collider (LHC). Intriguingly\, LHC data sugg
 ests that high-energy processes with resonant\, helicity-polarized weak bo
 sons are well described by an incoherent sum of polarized contributions. I
 n other words\, the quantum mechanical interference among intermediate pol
 arization states in inclusive measurements is small. In this talk\, we sho
 w that this can be understood from current conservation and kinematics\, w
 ith high-energy W and Z bosons behaving like long-lived\, asymptotic state
 s that are distinguishable (in the quantum mechanical sense). The technica
 l parts of the talk relate to how BRST cancellations are manifestly mainta
 ined despite working directly with intermediate\, polarized bosons that ar
 e possibly (slightly) off shell.\n\nhttps://indico.ifj.edu.pl/event/1675/
URL:https://indico.ifj.edu.pl/event/1675/
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