Optimizing Higgs factories by modifying the recoil mass
| Autor: | Ying-Ying Li, Jiayin Gu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Nuclear and High Energy Physics
Particle physics lepton FOS: Physical sciences Higgs particle 01 natural sciences 7. Clean energy Measure (mathematics) High Energy Physics - Experiment law.invention High Energy Physics - Experiment (hep-ex) effective field theory Recoil High Energy Physics - Phenomenology (hep-ph) law 0103 physical sciences ddc:530 010306 general physics Collider Instrumentation Physics background 010308 nuclear & particles physics Higgs-factory recoil [mass] Astronomy and Astrophysics High Energy Physics - Phenomenology Higgs boson High Energy Physics::Experiment Center of mass Higgs [coupling] Energy (signal processing) Lepton Bar (unit) |
| Zdroj: | Chinese physics / C 42(3), 033102-(2018). doi:10.1088/1674-1137/42/3/033102 |
| DOI: | 10.1088/1674-1137/42/3/033102 |
| Popis: | It is difficult to measure the $WW$-fusion Higgs production process ($e^+e^- \to \nu \bar{\nu} h$) at a lepton collider with a center of mass energy of 240-250 GeV due to its small rate and the large background from the Higgsstrahlung process with an invisible $Z$ ($e^+e^- \to hZ,\,Z\to \nu\bar{\nu}$). We construct a modified recoil mass variable, $m^p_{\rm recoil}$, defined using only the 3-momentum of the reconstructed Higgs particle, and show that it can better separate the $WW$-fusion and Higgsstrahlung events than the original recoil mass variable $m_{\rm recoil}$. Consequently, the $m^p_{\rm recoil}$ variable can be used to improve the overall precisions of the extracted Higgs couplings, in both the conventional framework and the effective-field-theory framework. We also explore the application of the $m^p_{\rm recoil}$ variable in the inclusive cross section measurements of the Higgsstrahlung process, while a quantitive analysis is left for future studies. Comment: 25 pages, 8 figures |
| Databáze: | OpenAIRE |
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