• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Determining the structure of the Higgs sector by precisely evaluating constraints of perturbative unitarity

Research Project

Project/Area Number 20K14474
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 15010:Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research InstitutionNihon University (2021-2023)
Kitakyushu National College of Technology (2020)

Principal Investigator

KIKUCHI Mariko  日本大学, 工学部, 助教 (20824642)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords量子補正 / 拡張ヒッグス模型 / 崩壊分岐比 / ヒッグスポテンシャル / 付加的ヒッグスボソン / 量子効果 / 理論的制限 / 素粒子現象論 / ヒッグスセクター / 新物理模型 / 摂動ユニタリティ / 高次補正計算
Outline of Research at the Start

実験値との照合でボトムアップ的にヒッグスセクターを決定する方法では、精密測定実験、ヒッグス崩壊過程の精密理論計算、理論的制限の高精度評価が必要不可欠である。本研究では、有力な新物理模型において理論的制限(摂動ユニタリティ)を高精度で評価する計算を完成させプログラムコードを作成する。そして、現在公開されているヒッグス粒子過程精密計算プログラムと結合させ、将来の精密測定との照合によりヒッグス構造を決定するための理論的準備を整える。また、完成したプログラムコードを用いて「ヒッグス場の数」と「理論の対称性」を決める方法を研究し、ヒッグスセクターの構造決定、標準理論を超えた新物理理論解明に迫る。

Outline of Final Research Achievements

The Higgs boson (h) measurements at the LHC are consistent with the predictions of the Standard Model. It indicates the near-alignment in extended Higgs models. We have systematically studied radiative corrections quantum on decay branching ratios of additional Higgs bosons in extended Higgs models. We have published numerical program code for the decay branching ratios of all two-body decay processes of all additional Higgs bosons in several extended Higgs models (THDM, HSM and IDM). We also have shown the importance of model verification from three directions: precise measurement of h, direct search for additional Higgs bosons and theoretical restrictions such as perturbative unitarity.

Academic Significance and Societal Importance of the Research Achievements

本研究で作成・ヴァージョンアップさせたH-COUPを使えば誰しもがh及び付加的ヒッグスボソンのすべての2体崩壊の分岐比を高次補正を含めて高精度で理論計算でき、また理論的制限も評価できる。H-COUPを用いることで、今後の直接探索、間接探索、理論的制限を用いた複数の拡張ヒッグス模型におけるシナジー的検証方法によりヒッグスセクターの構造決定の研究が促進される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021 Other

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Journal Article] Probing extended Higgs sectors by the synergy between direct searches at the LHC and precision tests at future lepton colliders2021

    • Author(s)
      Aiko Masashi、Kanemura Shinya、Kikuchi Mariko、Mawatari Kentarou、Sakurai Kodai、Yagyu Kei
    • Journal Title

      Nuclear Physics B

      Volume: 966 Pages: 115375-115375

    • DOI

      10.1016/j.nuclphysb.2021.115375

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Exploring new physics by comprehensive studies of loop corrected decays of various Higgs bosons Mariko Kikuchi2023

    • Author(s)
      Mariko Kikuchi
    • Organizer
      HPNP2023 - The 6th International Workshop on "Higgs as a Probe of New Physics 2023"
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Comprehensive studies of loop-corrected decays of various Higgs bosons2023

    • Author(s)
      Mariko Kikuchi
    • Organizer
      Scalars 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Investigating new physics effects by loop corrected decays of the heavier CP-even Higgs boson2022

    • Author(s)
      Mariko Kikuchi
    • Organizer
      Physics in LHC and Beyond
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] H-COUPの進展: 重いヒッグス粒子の崩壊に関するNLO計算の包括的研究2022

    • Author(s)
      菊地真吏子
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 拡張ヒッグス模型におけるHiggs to Higgs崩壊に対する 量子効果 II2021

    • Author(s)
      菊地真吏子
    • Organizer
      2021年日本物理学会秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 拡張ヒッグス模型における Higgs to Higgs 崩壊に対する量子効果2021

    • Author(s)
      菊地真吏子
    • Organizer
      日本物理学会第76回年次大会(2021年)
    • Related Report
      2020 Research-status Report
  • [Remarks] H-COUP

    • URL

      http://www-het.phys.sci.osaka-u.ac.jp/~hcoup/

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi