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SUMMARY:Top-quark pair production sensitivity to heavy new physics at the 
 FCC-ee
DTSTART;VALUE=DATE-TIME:20261020T113000Z
DTEND;VALUE=DATE-TIME:20261020T115000Z
DTSTAMP;VALUE=DATE-TIME:20261011T233459Z
UID:indico-contribution-31606@indico.ific.uv.es
DESCRIPTION:Speakers: Sergio Sanchez Cruz (Universidad de Oviedo)\nWe stud
 y the sensitivity of top-quark pair production at the FCC-ee to heavy new 
 physics\, parametrised\nin the Standard Model effective field theory\, usi
 ng discriminants based on matrix elements. The\nanalysis includes detector
  reconstruction effects\, obtained with a fast simulation of the IDEA dete
 ctor\nconcept\, and jet flavour tagging. We consider dimension-six operato
 rs that modify the electroweak\ncouplings of the top quark or generate fou
 r-fermion interactions\, at leading order and\nin diagrams with two resona
 nt top quarks. The full six-body kinematic information is employed\nto max
 imise the discrimination power against the Standard Model. Two bins per di
 mension in\nthe space of 12 discriminants\, one per operator considered\, 
 provide a simple and robust methodology\nto set nearly optimal multidimens
 ional constraints. Bounds on the new physics scale can\nreach values up to
  30 TeV in a single-operator fit and up to 5 TeV in a global multi-operato
 r fit. A\ncombination with High-Luminosity LHC prospects on top-quark oper
 ators shows complementary\nsensitivities which help lift approximate degen
 eracies.\n\nhttps://indico.ific.uv.es/event/8657/contributions/31606/
LOCATION:Delegacion del CSIC
URL:https://indico.ific.uv.es/event/8657/contributions/31606/
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