2026/6/21
Seddigheh Tizchang

Seddigheh Tizchang

Academic rank: Assistant Professor
ORCID: https://orcid.org/ 0000-0002-9034-598X
Education: PhD.
H-Index:
Faculty: Science
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E-mail: s-tizchang [at] araku.ac.ir
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Research

Title
Search for heavy neutral Higgs bosons A and H in the tt¯Z channel in proton-proton collisions at 13 TeV
Type
JournalPaper
Keywords
CMS- Higgs boson
Year
2025
Journal Physical letter B
DOI
Researchers CMS Collaboration ، Aram Hayrapetyan ، Armen Tumasyan ، Wolfgang Adam ، Janik Walter Andrejkovic ، Seddigheh Tizchang

Abstract

A direct search for new heavy neutral Higgs bosons Image 1 and Image 2 in the Image 3 channel is presented, targeting the process Image 4 with Image 5. For the first time, the channel with decays of the Image 6 boson to muons or electrons in association with all-hadronic decays of the Image 7 system is targeted. The analysis uses proton-proton collision data collected at the CERN LHC with the CMS experiment at s=13TeV, which correspond to an integrated luminosity of 138fb−1. No signal is observed. Upper limits on the product of the cross section and branching fractions are derived for narrow resonances Image 8 and Image 9 with masses up to 2100 and 2000 GeV, respectively, assuming Image 10 boson production through gluon fusion. The results are also interpreted within two-Higgs-doublet models, where Image 11 and Image 12 are CP-odd and CP-even states, respectively, complementing and substantially extending the reach of previous searches.