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Search for massive WH resonances decaying into the [Formula: see text] final state at [Formula: see text][Formula:
V Khachatryan1, A M Sirunyan1, A Tumasyan1
1Yerevan Physics Institute, Yerevan, Armenia.
The European Physical Journal. C, Particles and Fields
|March 11, 2017
Summary
Researchers searched for a massive resonance decaying into a W boson and a Higgs boson using CMS detector data. Exclusion limits were set on resonance production, with new mass limits established for theoretical models.
Area of Science:
- High Energy Physics
- Particle Physics
- Collider Physics
Background:
- Searches for new physics beyond the Standard Model are crucial for understanding fundamental interactions.
- Resonances decaying into W and Higgs bosons are predicted by various extensions to the Standard Model, such as little Higgs and composite Higgs models.
Purpose of the Study:
- To search for a massive resonance decaying into a W boson and a Higgs boson in proton-proton collision data.
- To set exclusion limits on the production cross section of such a resonance.
- To constrain parameters of theoretical models, including the little Higgs model and heavy vector triplet model.
Main Methods:
- Analysis of proton-proton collision data collected by the CMS detector at the LHC.
- Reconstruction of bottom quarks from Higgs boson decays as a single jet, utilizing substructure and flavour tagging.
- Statistical analysis to set exclusion limits at 95% confidence level.
Main Results:
- Exclusion limits were placed on the production cross section of a narrow resonance decaying into WH as a function of its mass.
- A lower limit of 1.4 TeV on the [Formula: see text] mass was set within the context of a little Higgs model.
- A lower limit of 1.5 TeV on the [Formula: see text] mass was set in a heavy vector triplet model, which was further improved to 1.8 TeV when combined with related searches.
Conclusions:
- The study provides stringent constraints on new physics models predicting resonances decaying to W and Higgs bosons.
- The obtained mass limits, particularly the 1.8 TeV limit for decays to Standard Model boson pairs, represent the most restrictive to date.
- This search contributes to the ongoing effort to uncover new particles and phenomena at the LHC.
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