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SUMMARY:Higgs scattering and entanglement in SMEFT
DTSTART:20261001T113000Z
DTEND:20261001T123000Z
DTSTAMP:20261105T113900Z
UID:indico-event-1719476@indico.cern.ch
DESCRIPTION:Speakers: Hyun Min Lee (CAU - Chung-Ang University (KR))\n\nWe
  regard the weak isospin of the Higgs doublet as a qubit and classify the 
 entanglement measures for the Higgs scattering in the Standard Model Effec
 tive Field Theories (SMEFT) and their Ultra-Violet complete models. We con
 sider Higgs scattering in the unbroken phase for electroweak symmetry. Tre
 ating the final state as a momentum-isospin bipartite system\, we obtain v
 on Neumann and linear entropies to quantify momentum-isospin correlation. 
 From the momentum reduced state\, we calculate the concurrence\, which mea
 sures the entanglement between the two isospins. Both quantities are set b
 y the isospin singlet and triplet scattering amplitudes\, and hence by the
  Wilson coefficients of the dimension-6 and dimension-8 Higgs operators. W
 e find that the von Neumann entropy grows as a function of the total energ
 y in SMEFT as compared to the SM case\, but it undergoes a cancellation in
  the medium energy below the cut-off scale due to the interference effects
  between the dimension-4 and dimension-8 operators\, in particular\, when 
 the effective interactions stem dominantly from a massive graviton. Assumi
 ng the dominance of dimension-8 operators\, we find the conditions for ent
 anglement suppression in the forward or backward scatterings or across all
  the kinematics. We also show the correlations between the entanglement su
 ppression and the positivity bounds in the forward limit.\n\nhttps://indic
 o.cern.ch/event/1719476/\n\nZoom: https://cern.zoom.us/j/65562333965?pwd=V
 UcvclhVMnBkSXFlcTlCRVltd1VRUT09
LOCATION:4/2-037 - TH meeting room (CERN)
URL:https://indico.cern.ch/event/1719476/
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