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SUMMARY:A novel approach to Higgs boson mass reconstruction in four-jet fi
 nal states from e+e- collisions in CEPC at sqrt(s)=240 GeV
DTSTART;VALUE=DATE-TIME:20261030T073000Z
DTEND;VALUE=DATE-TIME:20261030T074500Z
DTSTAMP;VALUE=DATE-TIME:20261027T213531Z
UID:indico-contribution-6180@cern.ch
DESCRIPTION:Speakers: Anna Staritsyna (LPI RAS\, MIPT)\nThe measurement of
  the Higgs boson parameters constitutes a significant part of the CEPC pro
 gram. This work is devoted to studying the process e-e+->ZH at sqrt(s) = 2
 40 GeV with all-hadronic\, four-jet final states. The CEPC detector fast s
 imulation and event reconstruction using the Delphes package have been per
 formed for the signal and different background processes. A novel approach
  to four-jet final state analysis has been implemented\, which allows bett
 er reconstruction of boson mass by combining information from dijet invari
 ant mass and recoil mass to another dijet. The cut-based approach was appl
 ied to reject leptonic and semileptonic backgrounds. For effective suppres
 sion of the four-jet background\, a Transformer-based classifier was train
 ed using the PyTorch framework for binary classification on the mixed data
 set before or after kinematic cuts. Different combinations of signal effic
 iencies and purities are considered and their impact on the accuracy of Hi
 ggs boson mass measurement is estimated.\n\nhttps://indico.particle.mephi.
 ru/event/626/contributions/6180/
LOCATION: Conference Hall 2
URL:https://indico.particle.mephi.ru/event/626/contributions/6180/
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